Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm ENVEMARCH the tire bed is free

the tire bed is free of spoke holes

Inner end cap (2 pcs

The saddle rails have a highly oval shape and gain extra stability due to the special fiber orientation and reinforcements and resist any potholes and bumps on or off-road

Gone are the days of skin-less knuckles

Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm ENVEMARCH the tire bed is freeThe quality and performance oriented Shimano BB UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line. Specifications Adapter: aluminum (left), aluminum steel (right) Axle: steel Mfr Claimed Weight TBC