Bicycle crank assembly

摘要

A bicycle crank assembly includes a crank arm and at least one sprocket. The sprocket includes a set of regular teeth and a set of first and second teeth. The first teeth have a first chain engaging tooth width for engaging outer links of a bicycle chain. The second teeth have a second chain engaging tooth width for engaging inner links of the bicycle chain. The first chain engaging tooth width is greater than the second chain engaging tooth width. The regular teeth have a third chain engaging tooth width being smaller than the first chain engaging tooth width. The regular teeth are disposed along at least one of top and bottom dead center areas with respect to the crank arm. The first and second teeth are disposed along at least between the top and bottom dead center areas with respect to the crank arm.

主权项

1. A bicycle crank assembly comprising:
a crank arm; and at least one sprocket having a rotational center axis and a plurality of teeth formed about a periphery of the at least one sprocket, the plurality of teeth including a set of regular teeth and a set of first and second teeth, the first teeth having a first chain engaging tooth width for engaging with an outer link of a bicycle chain, the second teeth having a second chain engaging tooth width for engaging with an inner link of the bicycle chain, the first chain engaging tooth width being greater than the second chain engaging tooth width, the regular teeth having a third chain engaging tooth width being smaller than the first chain engaging tooth width, the regular teeth including at least three consecutive teeth centered in at least one of a top dead center area and a bottom dead center area with respect to the crank arm, the first and second teeth being disposed between the top dead center area and the bottom dead center area with respect to the crank arm.