WHEELS MANUFACTURING Enduro 24x37x7 Angular Contact Bearing BB90 for Sram GXP

The BB90/95 standard is used by Trek on many frames. Two sealed bearings (37mm OD) are pressed directly in to the frame´s bottom bracket shell. A step is molded in to the frame for the bearings to seat against. Trek BB90/95 frames do not use bearing retainer clips. Compatible with 24mm or 24/22mm spindle cranks only. Wheels Mfg does not make a cup & bearing system for BB90/95 frames. Your only option is to replace your existing bearings when necessary.