Shimano Dura-Ace R9100 Hollowtech II English Bottom Bracket ModelNumber=MDTSWISS21 Integrated air assist for progressivity

Integrated air assist for progressivity and bottom out control

}Full Speed Ahead Pro Track Chainring 53t x 144mm 1/2x1/8" Black

Tool-free handlebar or helmet mount

Spoke Interface J-Bend Defined Color Black Color Black Flange Diameter Right 42 Flange Diameter Left 57 Weight 176 Hub Drilling 28 Bearing Type Sealed Cartridge Front Axle 15mm Thru x 110mm Hub/Brake Compatibility 6-Bolt Disc Center to Flange Right 42

8-speed Brakes Tektro M275 hydraulic disc

Shimano Dura-Ace R9100 Hollowtech II English Bottom Bracket ModelNumber=MDTSWISS21 Integrated air assist for progressivityShimano Dura Ace R9100 Hollowtech II English Bottom Bracket. Shimano Dura Ace BB92 BB9000 Hollowtech II Bottom Brackets TECH SPECS Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 68 Weight 65 Spindle Interface Type Shimano Hollowtech II Defined Color Black