C-BEAR BB90 Trek Shimano Race Bottom Bracket 37 x 90.5 mm

C-BEAR BB90 Trek Shimano Race bottom bracket - Silent Speed PerformanceThe C-BEAR BB90 Trek Shimano Race bottom bracket is a special bottom bracket for the installation of a 24 mm crank (especially Shimano Hollowtech II) into a BB90 Road frame by Trek. The