Square Taper Bottom Brackets

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 Classic models, or aerospace grade titanium for our Pro models. 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. Occasionally, when British threads are damaged, mechanics have been known to salvage the frame by tapping the damaged side for Italian threading and installing an Italian cup on that side. Phil Wood cups are also available in singles to accommodate these needs.
 
Please Note: In order to install our square taper bottom bracket cups you will need either our Portable Square Taper Bottom Bracket Installation Tool or Professional Shop Square Taper Bottom Bracket Installation Tool. These tools are unchanged since their original release by us in 1971. So if you already have this tool you do not need to purchase a new one.
 
INSTRUCTIONS
 
Square Taper Bottom Bracket Installation (pdf)
T47 Square Taper Bottom Bracket Installation (pdf)