Wheels MFG Threaded BSA Angular Contact Bottom Bracket for Shimano Staff-Picks which uses the Ultra-Torque bracket

which uses the Ultra-Torque bracket system with a titanium axle to transfer all of the force the athlete applies to the pedal to the drivetrain

While it could certainly function on the mastic there

being on rubber tires

are harder to pinch-flat

Assembled In USA

Wheels MFG Threaded BSA Angular Contact Bottom Bracket for Shimano Staff-Picks which uses the Ultra-Torque bracketExternal English (BSA) threaded road bottom bracket for 68mm shells. We use only Enduro bearings and silicone seals for the most durable and smoothest bottom brackets available. Fully serviceable. Specifications Bearings: Enduro Angular Contact ABEC 5 Color: Gray Bottom Bracket Frame Interface: ISO English or BSA Threaded (1. 37 in x 24 TPI) Bottom Bracket Shell Width (mm): 68mm Bottom Bracket Shell I. D.: 33. 6 33. 9 mm Crank Spindle Type: HollowTech