Mountain Bike Race No Chain. Mountain bikes have chains that allow them to withstand grits of the rocks. They have special coatings that make their cleaning easier which will prevent the buildup of debris that results in rusts.
If you race or ride very aggressively you can use a chain device for even more security. A majority of BMX bike chains are much narrower than road or mountain bikes; BMX chains measure at ⅛" width. We build XC machines that are not only ultralight, but also ultra-capable, because you're faster when you're in total control.
The rules for most races depend on the type of race you're signing up for.
Its often been said that riding chainless.
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A majority of BMX bike chains are much narrower than road or mountain bikes; BMX chains measure at ⅛" width. The thick viscosity and synthetic additives to help reduce friction, to obtain a smooth shifting and extend the life of the drive train. Higher end chains last longer and come in a variety of colors for a clean ride and stylish look.