The design consists of the features of shape, pattern and configuration of the bicycle cuff lock as shown in the drawings.Drawings of the design are included, in which:Fig. 1 is a perspective view of a bicycle cuff lock showing the new design;Fig. 2 is a right view of the bicycle cuff lock of Fig. 1;Fig. 3 is a front end view of the bicycle cuff lock of Fig. 1;Fig. 4 is a bottom view of the bicycle cuff lock of Fig. 1;Fig. 5 is a back end view of the bicycle cuff lock of Fig. 1;Fig. 6 is a left view of the bicycle cuff lock of Fig. 1;Fig. 7 is a top view of the bicycle cuff lock of Fig. 1;Fig. 8 is a perspective view of a bicycle cuff lock shown in Fig. 1 showing the cuff locks engaged;Fig. 9 is a right view of the bicycle cuff lock of Fig. 8;Fig. 10 is a front end view of the bicycle cuff lock of Fig. 8;Fig. 11 is a bottom view of the bicycle cuff lock of Fig. 8;Fig. 12 is a back end view of the bicycle cuff lock of Fig. 8;Fig. 13 is a left view of the bicycle cuff lock of Fig. 8;Fig. 14 is a top view of the bicycle cuff lock of Fig. 8;Fig. 15 is a perspective view of a second variant of a bicycle cuff lock showing the new design;Fig. 16 is a right view of the bicycle cuff lock of Fig. 15;Fig. 17 is a front end view of the bicycle cuff lock of Fig. 15;Fig. 18 is a bottom view of the bicycle cuff lock of Fig. 15;Fig. 19 is a back end view of the bicycle cuff lock of Fig. 15;Fig. 20 is a left view of the bicycle cuff lock of Fig. 15;Fig. 21 is a top view of the bicycle cuff lock of Fig. 15;Fig. 22 is a perspective view of a bicycle cuff lock shown in Fig. 15 showing the cuff locks engaged;Fig. 23 is a right view of the bicycle cuff lock of Fig. 22;Fig. 24 is a front end view of the bicycle cuff lock of Fig. 22;Fig. 25 is a bottom view of the bicycle cuff lock of Fig. 22;Fig. 26 is a back end view of the bicycle cuff lock of Fig. 22;Fig. 27 is a left view of the bicycle cuff lock of Fig. 22;Fig. 28 is a top view of the bicycle cuff lock of Fig. 22;Fig. 29 is a perspective view of a third variant of a bicycle cuff lock showing the new design;Fig. 30 is a right view of the bicycle cuff lock of Fig. 29;Fig. 31 is a front end view of the bicycle cuff lock of Fig. 29;Fig. 32 is a bottom view of the bicycle cuff lock of Fig. 29;Fig. 33 is a back end view of the bicycle cuff lock of Fig. 29;Fig. 34 is a left view of the bicycle cuff lock of Fig. 29;Fig. 35 is a top end view of the bicycle cuff lock of Fig. 29;Fig. 36 is a perspective view of a fourth variant of a bicycle cuff lock showing the new design;Fig. 37 is a right view of the bicycle cuff lock of Fig. 36;Fig. 38 is a front end view of the bicycle cuff lock of Fig. 36;Fig. 39 is a bottom view of the bicycle cuff lock of Fig. 36;Fig. 40 is a back end view of the bicycle cuff lock of Fig. 36;Fig. 41 is a left view of the bicycle cuff lock of Fig. 36; andFig. 42 is a top view of the bicycle cuff lock of Fig. 36.