TWM493483U - Bicycle wheel rim - Google Patents

Description

Bicycle rim

This creation is about bicycle rims.

Bicycles are becoming more and more popular as a form of leisure or movement. In addition, bicycles are becoming more popular in competitive sports, both in amateur competitions and in professional competitions. In the bicycle industry, various bicycle components are continuously being improved, regardless of the type of bicycles for leisure, mobile, and competitive bicycles. A bicycle rim according to one of the known bicycle components has a rotating shaft center and includes two side walls facing each other and an annular connecting portion for connecting the two side walls.

This creation wants to provide: lightweight bicycle rims.

[1] One of the bicycle rims according to the present creation The bicycle rim having a rotating shaft center includes a first side wall, a second side wall facing the first side wall, and an annular first connection for connecting the first side wall and the second side wall The first connecting portion includes a spoke attachment hole for mounting the spoke, and the first surface of the first side wall facing the axially outward side, the second surface of the second side wall facing outward in the axial direction, and At least one groove is formed on at least one of the third faces of the first joint portion facing the radially inner side, and the width of the groove portion is smaller than the diameter of the spoke attachment hole.

[2] According to one aspect of the bicycle rim, the at least one groove portion extends in the circumferential direction.

[3] In one aspect of the bicycle rim, the at least one groove portion is formed on at least one of the first surface, the second surface, and the third surface. On the entire circumference.

[4] According to one aspect of the bicycle rim, the width of at least one of the grooves is in a range of 0.5 mm to 1.0 mm.

[5] According to one aspect of the bicycle rim, the depth of at least one of the grooves is in a range of 0.4 mm to 1.0 mm.

[6] According to one aspect of the bicycle rim, the diameter of the spoke mounting hole is in the range of 2.0 mm to 3.0 mm.

[7] According to one aspect of the bicycle rim, the at least one groove portion includes a first groove portion and a second groove portion, and the first portion The groove portion and the second groove portion are substantially parallel.

[8] According to one aspect of the bicycle rim, the distance between the first groove portion and the second groove portion is in a range of 1.8 mm to 2.0 mm.

[9] According to one aspect of the bicycle rim, the first groove portion and the second groove portion are formed on the third surface, and at least one of the first groove portion and the second groove portion is attached to the spoke. The holes form a cross.

[10] According to one aspect of the bicycle rim, the at least one groove portion includes a first groove portion, a second groove portion, and a third groove portion, and the first groove portion, the second groove portion, and the third groove portion are substantially Parallel.

[11] According to one aspect of the bicycle rim, the first groove portion, the second groove portion, and the third groove portion are formed on the third surface, among the first groove portion, the second groove portion, and the third groove portion. A groove portion intersects with a central axis of the aforementioned spoke mounting hole.

[12] The bicycle rim according to the aspect of the invention, further comprising: a second connecting portion that is connected to the first side wall and the second side wall and that faces the first connecting portion, and faces the diameter A tire mounting portion for mounting a tire is formed on the fourth surface side of the second connecting portion on the outer side.

[13] According to one aspect of the bicycle rim, the first connecting portion is disposed radially inward of the second connecting portion.

[14] According to one aspect of the bicycle rim, at least one of the grooves is formed by an extrusion molding method.

[15] According to one aspect of the bicycle rim, at least one of the groove portions described above is formed by cutting.

[16] According to one aspect of the bicycle rim, the bicycle rim includes at least a metal material.

[17] According to one aspect of the bicycle rim, diamond cut surface processing is performed on at least one of the first surface, the second surface, and the third surface.

[18] In one aspect of the bicycle rim according to the present invention, the bicycle rim having a rotating shaft center includes: a first side wall and a second side wall facing the first side wall, and facing the shaft At least one of the first surface of the first side wall and the second surface of the second side wall facing outward in the axial direction is formed with at least one groove.

[19] One aspect of the bicycle rim according to the present invention is a bicycle rim having a rotation axis, comprising: a first side wall and a second side wall facing the first side wall for connecting the aforementioned The first first connecting portion of the first side wall and the second side wall is a first surface of the first side wall facing outward in the axial direction, a second surface facing the second side wall facing outward in the axial direction, and a facing surface At least one of the third faces of the first connecting portions on the radially inner side is subjected to diamond cut surface processing.

[20] One aspect of the bicycle rim according to the present invention is a bicycle rim having a rotation axis, comprising: a first side wall; and a second side wall facing the first side wall, facing the shaft to At least one of the first surface of the first side wall on the outer side and the second surface of the second side wall facing the outer side in the axial direction is subjected to diamond cut surface processing.

Any of the embodiments of the bicycle rim of the present invention contributes to weight reduction.

10‧‧‧ rims

14‧‧‧ spokes

16‧‧‧ tires

26‧‧‧1st side wall

28‧‧‧ second side wall

30‧‧‧1st link

32‧‧‧2nd link

34‧‧‧1st

36‧‧‧2nd

38‧‧‧3rd

40‧‧‧4th

42‧‧‧ Tire installation

46‧‧‧ spoke mounting holes

50‧‧‧1st ditch

52‧‧‧2nd ditch

54‧‧‧3rd ditch

Fig. 1 is a perspective view of a wheel set of an embodiment.

Fig. 2 is a cross-sectional view taken along the line Z2-Z2 in Fig. 1.

Fig. 3 is a perspective view of a rim of the embodiment.

Fig. 4 is a plan view showing a first connecting portion of the rim of the embodiment.

Fig. 5 is a perspective view of a rim of a modification.

The structure of the front wheel 1 for bicycles will be described with reference to Fig. 1 .

The front wheel group 1 includes a bicycle rim (hereinafter referred to as "rim 10") having a rotation axis, and a hub 12 disposed on the rotation axis of the rim 10 for connecting the rim 10 and A plurality of spokes 14 of the hub 12, and a tire 16 mounted on the rim 10. Front wheel set 1 Further, there is provided a brake device 18 for braking the rotation of the front wheel set 1.

The hub 12 is a front fork 20 that is supported by a part of a body frame of a bicycle (not shown) so as to be rotatable relative to each other. One example of the spokes 14 is aero-spoke.

The brake device 18 includes a brake disc 22 that is fixed to the hub 12 so as to be rotatable integrally with the hub 12, and a brake caliper 24 for braking the rotation of the brake disc.

One example of the material of the brake disc 22 is stainless steel. The brake disc 22 is fixed to the hub 12 by a fixing ring (not shown) or the like. A groove portion 22A is formed on the outer circumference of the brake disc 22 .

The brake caliper 24 is connected to the brake handle (not shown). A brake block (not shown) is attached to the inner surface of the brake caliper 24. When the brake caliper 24 is operated, the brake caliper 22 is clamped by the brake block to brake the rotation of the brake disk 22. Thereby, the rotation of the front wheel set 1 is stopped by braking.

Next, the structure of the rim 10 will be described with reference to Fig. 2 .

The material of the rim 10 is preferably a material containing a lightweight and high-strength metal material, one of which is aluminum. The rim 10 includes a first side wall 26, a second side wall 28 that faces the first side wall 26, and a first connecting portion 30 that connects the one end of the first side wall 26 and the second side wall 28, and Used to connect the other end of the first side wall 26 and the second side wall 28 The second connecting portion 32 that is annular. The first connecting portion 30 is disposed further inward in the radial direction of the rim 10 than the second connecting portion 32.

The first surface 34 of the first side wall 26 of the rim 10 facing the axially outer side and the second surface 36 of the second side wall 28 of the rim 10 facing outward in the axial direction are curved surfaces that are smoothly bulged . Further, the end portion of the tire 16 (see FIG. 3) on the first surface 34, that is, the first end portion 34A and the end on the tire 16 side of the second surface 36 may be used. The portion, that is, the second end portion 36A, is subjected to diamond cut surface processing in the entire circumferential direction. In this case, the width of the first end portion 34A and the second end portion 36A is preferably in the range of 2.0 mm to 3.0 mm.

The third surface 38 of the first joint portion 30 of the rim 10 facing the radially inner side is subjected to diamond cut surface processing. The tire mounting portion 42 on which the tire 16 is attached is formed on the fourth surface 40 side of the second connecting portion 32 of the rim 10 facing radially outward. On the fourth surface 40, a plurality of openings 44 are formed.

As shown in FIGS. 2 and 3, the third surface 38 is formed with a plurality of spoke attachment holes 46 for arranging the plurality of spokes 14 in the circumferential direction. One end of the spoke 14 is engaged with a hole (not shown) formed in the hub 12 (please refer to FIG. 1), and the other end of the spoke 14 formed as a male thread is engaged via the spoke mounting hole 46. In the spoke nut 48 formed as a female thread. Thereby, the spokes 14 are fixed to the rim 10. Further, the spoke nut 48 is placed inside the rim 10 from the opening 44 formed in the fourth face 40.

Here, the groove portions 50, 52, and 54 will be described with reference to FIG. Structure.

The first groove portion 50, the second groove portion 52, and the third groove portion 54 are formed to extend in the circumferential direction on the third surface 38. The first groove portion 50 is formed between the second groove portion 52 and the third groove portion 54 at the center in the width direction of the third surface 38. Each of the grooves 50, 52, 54 is formed over the entire circumference and is substantially parallel to each other.

At least one central axis of the plurality of spoke attachment holes 46 intersects with the first groove portion 50. Further, at least one central axis of the plurality of spoke attachment holes 46 may intersect the second groove portion 52 or may intersect the third groove portion 54. Further, the diameter of the spoke attachment hole 46 is preferably in the range of 2.0 mm to 3.0 mm. One of the diameters of the spoke mounting holes 46 is exemplified by 2.5 mm.

The width of each of the groove portions 50, 52, 54 is smaller than the diameter of the spoke attachment hole 46. The width of each of the groove portions 50, 52, 54 is preferably in the range of 0.5 mm to 1.0 mm. One of the widths of the groove portions 50, 52, 54 is 0.5 mm. Further, the width of each of the groove portions 50, 52, 54 may be the same or different.

The depth of each of the groove portions 50, 52, 54 is preferably in the range of 0.4 mm to 1.0 mm. One example of the depth of each of the groove portions 50, 52, 54 is 0.5 mm. Further, the depths of the respective groove portions 50, 52, 54 may be the same or different.

The interval between the first groove portion 50 and the second groove portion 52 and the interval between the first groove portion 50 and the third groove portion 54 are preferably in the range of 1.8 mm to 2.0 mm. The distance between the first groove portion 50 and the second groove portion 52, and the first groove An example of the interval between the portion 50 and the third groove portion 54 is 1.8 mm. Further, the interval between the first groove portion 50 and the second groove portion 52 and the interval between the first groove portion 50 and the third groove portion 54 may be the same or different.

Next, an example of a manufacturing process of the rim 10 will be described with reference to FIGS. 1 to 4 .

The manufacturing process of the rim 10 (refer to FIG. 1) includes a first process, a second process, a third process, and a fourth process.

In the first step, the aluminum material is extruded by an extrusion molding machine (not shown) to produce a rod-shaped member which is the basis of the rim 10 . In this extrusion process, the rod-like members are manufactured, and each of the groove portions 50, 52, and 54 (refer to FIG. 3) is formed in the rod-shaped member corresponding to the third surface 38 (please Refer to section 3).

In the second step, the rod-shaped members manufactured in the first step are bent into a ring shape, and one of the end portions is welded to the other end portion.

In the third step, the diamond cut surface processing is performed on the portion corresponding to the third surface 38 (see FIG. 2) among the rod-shaped members. Further, in the third step, the first end portion 34A corresponding to the first surface 34 (see FIG. 2) and the second surface corresponding to the second surface 36 may be used for the rod-shaped member. At the end 36A (please refer to Figure 2), the diamond cut surface is processed.

In the fourth step, as shown in FIG. 4, the central axis intersects with the first groove portion 50 formed in the rod-shaped member. To form the spoke mounting holes 46. The rim 10 is manufactured by the above-described first to fourth steps (please refer to FIG. 1).

The rim 10 can achieve the following effects and effects.

(1) The rim 10 is formed with the respective groove portions 50, 52, and 54 on the third surface 38. Therefore, it is lighter in weight than the structure in which the respective groove portions 50, 52, and 54 are not formed.

(2) The third surface 38 of the rim 10 is formed with the respective groove portions 50, 52, 54 whose width is smaller than the diameter of the spoke attachment hole 46. These grooves 50, 52, 54 visually give the viewer an intelligent and wise impression. Therefore, the design feeling of the rim 10 can be improved.

(3) The third surface 38 of the rim 10 is formed to extend in the circumferential direction, and each of the grooves 50, 52, and 54 is formed over the entire circumference. According to this configuration, the design feeling of the rim 10 can be improved without depending on the rotational position of the rim 10.

(4) The width of each of the groove portions 50, 52, 54 is in the range of 0.5 mm to 1.0 mm. Therefore, compared with the structure in which the width of each of the groove portions 50, 52, and 54 does not fall within the range of 0.5 mm to 1.0 mm, the viewer is visually presented with a smart and wise impression. Therefore, the design feeling of the rim 10 can be improved.

Further, when the width of each of the groove portions 50, 52, and 54 is, for example, 0.5 mm or more, when the width of each of the groove portions 50, 52, and 54 is less than 0.5 mm, the former groove portions 50 and 52, 54 is more eye-catching. Further, according to the configuration in which the width of each of the groove portions 50, 52, and 54 is 1.0 mm or less, the width of each of the groove portions 50, 52, and 54 is different. When the structure is larger than 1.0 mm, the soil or the like adhering to the rim 10 is less likely to enter the respective groove portions 50, 52, and 54. Therefore, the aesthetic appearance of the rim 10 can be easily maintained.

(5) The depth of each of the groove portions 50, 52, 54 is in the range of 0.4 mm to 1.0 mm. Therefore, if the depth of each of the groove portions 50, 52, and 54 does not fall within the range of 0.4 mm to 1.0 mm, it is visually attractive to the viewer. Therefore, the design feeling of the rim 10 can be improved.

(6) The diameter of the spoke mounting hole 46 is in the range of 2.0 mm to 3.0 mm. The structure in which the diameter of the spoke mounting hole 46 is, for example, 2.0 mm or more can be made more lightweight when compared with a structure in which the diameter of the spoke mounting hole 46 is less than 2.0 mm. Further, according to the structure in which the diameter of the spoke mounting hole 46 is 3.0 mm or less, the spoke mounting hole 46 visually gives the viewer a clever comparison with the structure in which the diameter of the spoke mounting hole 46 is larger than 3.0 mm. The impression of wisdom. Therefore, the design feeling of the rim 10 can be improved.

(7) Each of the groove portions 50, 52, and 54 is substantially parallel in nature. Therefore, comparing the structures in which the respective groove portions 50, 52, and 54 are not parallel, visually gives the viewer an intelligent and wise impression. Therefore, the design feeling of the rim 10 can be improved.

(8) The interval between the first groove portion 50 and the second groove portion 52 and the interval between the first groove portion 50 and the third groove portion 54 are in the range of 1.8 mm to 2.0 mm. Therefore, the interval between the first groove portion 50 and the second groove portion 52 and the interval between the first groove portion 50 and the third groove portion 54 do not fall. A comparison of the structures in the range of 1.8mm to 2.0mm will visually give the viewer an intelligent and wise impression. Therefore, the design feeling of the rim 10 can be improved.

(9) The central axis of the plurality of spoke attachment holes 46 intersects with the first groove portion 50. Therefore, this intersection will visually give the viewer an intelligent and wise impression. Therefore, the design feeling of the rim 10 can be improved.

(10) According to the manufacturing process of the rim 10, when the extrusion molding is performed, a rod-shaped member which is the foundation of the rim 10 is produced, and each of the grooves 50, 52, and 54 is also formed. Therefore, when the structure of each of the groove portions 50, 52, and 54 is formed by machining by cutting or the like, the productivity of the rim 10 can be improved.

(11) The material of the rim 10 is aluminum. Therefore, a lightweight and high-strength rim 10 can be obtained.

(12) The third face 38 of the rim 10 is subjected to diamond cut surface processing. Therefore, the design feeling of the rim 10 can be improved. In addition, when the rim 10 is coated with a paint or the like on the third surface 38 of the rim 10, for example, a structure for improving the design feeling can be compared, and the design feeling can be improved without increasing the weight.

(13) The spoke nut 48 is disposed inside the rim 10. Therefore, the aerodynamic performance can be improved. Moreover, the design of the rim 10 can be improved.

(14) A groove portion 22A is formed on the outer circumference of the brake disc 22 . Therefore, weight reduction can be achieved. In addition, this groove portion 22A, visually, will Bring the viewer a smart and wise impression. Therefore, the design feeling of the front wheel set 1 can be improved.

(15) The brake device 18 brakes the rotation of the front wheel set 1 by sandwiching the brake disc 22 with the brake caliper 24. According to this configuration, water, mud, and the like originally attached to the tire 16 are less likely to adhere to the brake caliper 24, and therefore it is difficult to reduce the braking property of the front wheel group 1.

The specific form that can be obtained by the bicycle rim is not limited to the form exemplified in the above embodiment. The bicycle rim can be obtained in various forms different from the above embodiment. A modification of the above-described embodiment shown below is an example of various forms that can be obtained by the bicycle rim.

According to the rim 10 of the modification, as shown in FIG. 5, the fourth groove portion 56 and the fifth groove portion 58 are formed so as to extend in the circumferential direction, and are formed on the first surface 34 and the second surface in the entire circumferential direction. 36 (Please refer to Figure 2). The fourth groove portion 56 and the fifth groove portion 58 visually give the viewer an intelligent and wise impression. Therefore, the design feeling of the rim 10 can be improved. Further, in the rim 10 of this modification, at least one of the first groove portion 50, the second groove portion 52, and the third groove portion 54 can be omitted.

Further, the structure of the rim 10 according to this modification is, for example, a case in which the brake caliper 24 clamps the rim 10 to brake the rotation of the front wheel set 1, and the brake caliper 24 clamps the rim 10 The frictional heat is easily dissipated from the fourth groove portion 56 and the fifth groove portion 58.

According to the rim 10 of the modification, the diamond cut surface processing surface is formed on the entire surface of the first surface 34 and the second surface 36.

According to the manufacturing process of the rim 10 according to the modification, in the third step, diamond cut surface processing is performed on one or both of the first surface 34, the second surface 36, and the third surface 38. Moreover, according to the manufacturing process of the rim 10 of another modification, the 3rd process is abbreviate|omitted.

The material of the rim 10 of the modification is an aluminum alloy.

According to the manufacturing process of the rim 10 according to the modification, in the first step, each of the groove portions 50, 52, and 54 is formed by cutting. Further, according to the manufacturing process of the rim 10 according to another modification, each of the grooves 50, 52, and 54 is formed by etching in the first step. Further, in the manufacturing process of the rim 10 according to another modification, in the first step, one or both of the groove portions 50, 52, and 54 are formed in a rod shape as a base of the rim 10. The member is formed at the same time, and then the remaining groove portion is formed by cutting or etching.

According to the rim 10 of the modification, at least one of the groove portions 50, 52, 54 is formed to be meandered or curved.

According to the rim 10 of the modification, the interval between the first groove portion 50 and the second groove portion 52 and the interval between the first groove portion 50 and the third groove portion 54 are less than 1.8 mm or more than 2.0 mm.

According to the rim 10 of the modification, the diameter of the spoke mounting hole 46 is less than 2.0 mm or more than 3.0 mm.

According to the rim 10 of the modification, the depth of each of the grooves 50, 52, 54 is less than 0.4 mm or more than 1.0 mm.

According to the rim 10 of the modification, the width of each of the grooves 50, 52, 54 is less than 0.5 mm or more than 1.0 mm.

According to the rim 10 of the modification, at least one of the grooves 50, 52, 54 is formed to have regularity or irregularity and is intermittent. For example, according to the rim 10 of the modification, the first groove portion 50 is intermittently formed between the adjacent spoke attachment holes 46 so as not to intersect with the plurality of spoke attachment holes 46.

According to the rim 10 of the modification, in addition to the respective groove portions 50, 52, and 54, on the third surface 38, at least one groove portion is additionally formed.

According to the rim 10 of the modification, at least one of the grooves 50, 52, 54 is omitted. For example, the rim 10 of the modification omits the third groove portion 54. According to this modification, the first groove portion 50 is formed in the second surface 36 of the third surface 38 such that the distance between the first groove portion 50 and the second groove portion 52 falls within the range of 1.8 mm to 2.0 mm. On the side, the second groove portion 52 is formed on the first surface 34 side of the third surface 38. Moreover, according to this modification, the plurality of spoke attachment holes 46 are formed to intersect at least one of the first groove portion 50 and the second groove portion 52. For example, the plurality of spoke attachment holes 46 of the modified example intersect with both the first groove portion 50 and the second groove portion 52.

The brake disc 22 of the modification is such that the groove portion 22A is omitted.

The brake device 18 according to the modification is configured such that the brake caliper 24 clamps the rim 10 to brake the rotation of the front wheel set 1, instead of gripping the brake disc 22 with the brake caliper 24 for the front wheel set 1 The structure of the rotating brake.

The spokes 14 of the modification are flat spokes.

The rim 10 of the modification is used to constitute a rear wheel group (not shown).

One of the methods for improving the design feeling of the rim is a method of applying a coating to the rim. The rim that uses this method to enhance the design feel will increase in weight depending on the amount of paint applied. Therefore, the above method has the disadvantage of hindering the weight reduction of the rim.

On the other hand, according to the rim 10 according to the modification, at least one of the first surface 34, the second surface 36, and the third surface 38 is subjected to diamond cut surface processing, thereby improving the design thereof. sense. That is, the configuration of the rim 10 of this modification corresponds to the fact that each of the grooves 50, 52, and 54 is omitted from the rim 10 of the embodiment, and the first surface 34, the second surface 36, and the third surface are At least one of the faces 38 is structured to have a diamond cut surface. According to this rim 10, the paint for enhancing the design feeling is not applied, and therefore, the weight is lighter than the rim to which the paint is applied.

30‧‧‧1st link

38‧‧‧3rd

46‧‧‧ spoke mounting holes

50‧‧‧1st ditch

52‧‧‧2nd ditch

54‧‧‧3rd ditch

Claims (20)

A bicycle rim is a bicycle rim having a rotating shaft center, and includes: a first side wall; a second side wall facing the first side wall; and a ring shape for connecting the first side wall and the second side wall In the first connecting portion, the first connecting portion includes a spoke mounting hole for attaching the spoke, and the first surface of the first side wall facing the axially outward side and the second side wall facing the outer side in the axial direction At least one groove is formed on at least one of the two faces and the third face of the first joint portion facing the radially inner side, and the width of the groove portion is smaller than the diameter of the spoke attachment hole. The bicycle rim according to claim 1, wherein the at least one groove portion extends in a circumferential direction. The bicycle rim according to claim 2, wherein the at least one groove portion is formed on at least one of the first surface, the second surface, and the third surface The entire circumference of the face. The bicycle rim according to claim 1, wherein the width of at least one of the grooves is in a range of 0.5 mm to 1.0 mm. The bicycle rim according to claim 1, wherein the depth of at least one of the grooves is in a range of 0.4 mm to 1.0 mm. The bicycle rim according to claim 1, wherein the diameter of the spoke mounting hole is in a range of 2.0 mm to 3.0 mm. The bicycle rim according to claim 1, wherein the at least one groove portion includes a first groove portion and a second groove portion, and the first groove portion and the second groove portion are substantially parallel. The bicycle rim according to claim 7, wherein the distance between the first groove portion and the second groove portion is in a range of 1.8 mm to 2.0 mm. The bicycle rim according to claim 7, wherein the first groove portion and the second groove portion are formed on the third surface, and at least one of the first groove portion and the second groove portion is The aforementioned spoke mounting holes constitute an intersection. The bicycle rim according to the first aspect of the invention, wherein the at least one groove portion includes a first groove portion, a second groove portion, and a third groove portion, the first groove portion, the second groove portion, and the third portion The grooves are substantially parallel. The bicycle rim according to claim 10, wherein the first groove portion, the second groove portion, and the third groove portion are formed on the third surface, the first groove portion, the second groove portion, and the third groove portion. One of the grooves is formed to intersect the central axis of the spoke mounting hole. A bicycle rim according to claim 1, wherein Further, the second connecting portion that is connected to the first side wall and the second side wall and that faces the first connecting portion, and the fourth surface of the second connecting portion that faces outward in the radial direction On the side, a tire mounting portion for mounting a tire is formed. The bicycle rim according to claim 12, wherein the first connecting portion is disposed radially inward of the second connecting portion. The bicycle rim according to claim 1, wherein the at least one groove portion is formed by an extrusion molding method. The bicycle rim according to claim 1, wherein the at least one groove portion is formed by cutting. The bicycle rim according to claim 1, wherein the bicycle rim includes at least a metal material. The bicycle rim according to claim 1, wherein the diamond cut surface is processed on at least one of the first surface, the second surface, and the third surface. A bicycle rim is a bicycle rim having a rotating shaft center, and includes a first side wall and a second side wall facing the first side wall, and the first side wall facing the axially outer side At least one of the surface and the second surface of the second side wall facing the axially outer side is formed with at least one groove. Bicycle rim, which is used for bicycles with a rotating shaft The rim includes a first side wall, a second side wall facing the first side wall, and an annular first connecting portion for connecting the first side wall and the second side wall, and the outer surface facing the axial direction Diamond is implemented on at least one of the first surface of the first side wall, the second surface of the second side wall facing the axially outer side, and the third surface of the first connecting portion facing the radially inner side. Cut surface processing. A bicycle rim is a bicycle rim having a rotating shaft center, and includes a first side wall and a second side wall facing the first side wall, and the first side wall facing the axially outer side At least one of the surface and the second surface of the second side wall facing the axially outer side is subjected to diamond cut surface processing.