I don't know the name of it but there is a part on single speed bikes. The gear? I think right where the crank is connected. Well on bmx bikes and especially dirt jumping bikes it is really small and ...
How can I get a replacement crankset gear for Dahon P8? It is a 52 T with 5 screws. I searched shops here in Belgium, but they have only an expensive whole assembly.
I am looking at these components and am wondering what does double and triple gear shifting mean? Shimano R221 Double Gear Shifters 8 Speed ...