We manufacture our square taper bottom brackets for nearly all square taper cranks. Our spindles are made out of either US-produced heat-treated stainless steel for our Classicmodels, or aerospace grade titanium for our Promodels. Standard spindle lengths range from 102 mm to 185 mm. The spindles are sold as either a plain spindle (for use with press-fit style bottom bracket shells) or assembled in a cartridge with bearings. Cartridge widths are available for bottom bracket shells in 63, 68, 73, or 100 mm to accommodate the target frame. Custom spindle lengths and cartridge widths are available upon special request.
Our cups (also known as mounting rings) are sold separately from the bottom brackets and are available in all the threadings (British, Italian, Raleigh Super Corsa, French, Swiss, Chater Lea and T47). Extended cups with a left-hand lock ring are available in British threading for use with E-Type derailleurs or to hold a bracket to mount a chain guard.