QB-55 Quad Bottom Bracket 73mm BB

Why introduce square taper designs when every maker is moving away from them? Because there are still many loyal fans who trust the square design, know how to maximize the square design, and have square taper cranks in their garages. Made with Japanese quality by Tange Seki.

* QB-55 is our cheaper model with steel cups, alloy body, but it still has a plated hollow CrMo spindle * Sealed cartridge bearings * Made in Japan by Tange Seki * For 73mm bottom bracket shells only