The original Bottom Bracket for BMX, also referred to as a Pro size. The bearing rests in a cup that is pressed into the frame. The bearings are large and durable, but typically heavier than other types. 2" .
The bottom bracket or ‘BB’ is the engine room of your bike’s chainset and one of the two most important bearings on your machine (the other being the headset). Your BB is located at the junction of your frame’s seat- and down-tubes (in a hollow tube referred to as the ‘BB shell’) and.
NewThe Answer BMX Slider Bottom Bracket is one of the most popular and functional bottom bracket kits available in BMX racing. It is an adjustable bottom bracket that allows you View full product details».
Schlumpf makes a bottom bracket that incorporates a two-speed epicyclic transmission. Interface types. As well as the different means to fit the bottom bracket into the frame, there are a number of ways of connecting the crank arms to the bottom bracket spindle. Shimano introduced a proprietary splined interface named "Octalink".