They may also be employed on bicycles that do not have an adjustable rear wheel position, due to vertical dropouts or a rear disc brake , and that do not have an external rear derailleur such as single-speeds or bikes with an internal-geared hub. The cylinder, bearing and spindle are placed in the shell and held in place by the bearing cups, each of which has a narrow flange that bears against the edge of the shell. Schlumpf makes a bottom bracket that incorporates a two-speed epicyclic transmission.
Due to fixed spindle length and diameter, cranksets designed for one pressed standard may not be compatible with another. Archived copy as title Pages with URL errors Articles needing additional references from October All articles needing additional references. One is Truvativ's Power Spline interface.
This is known as a three-piece crankset. There are a number of versions of this design available:
Phil Wood uses a similar splined design to the Shimano bottom bracket. Snow bikes use a mm shell.
In late , Campagnolo announced that it was abandoning the square taper interface for double chainsets in favor of an outboard bearing design called Ultra-Torque , which uses a splined interface between spindle halves. Views Read Edit View history.