NEW Shimano GRX SM-RT64-M Disc Brake Rotor with External Lockring - 180mm, Center Lock, Silver shifter_12speed Safe for use on carbon

Safe for use on carbon fiber parts

Shimano Deore BB52 Hollowtech II Bottom Bracket

Seat Collar to Center of Rails —180 mm

Functionalized GRAPHENE 2

NEW Shimano GRX SM-RT64-M Disc Brake Rotor with External Lockring - 180mm, Center Lock, Silver shifter_12speed Safe for use on carbonThe Shimano GRX SM RT64 disc rotor delivers powerful and consistent braking performance in all riding conditions. The Center Lock mounting system makes installing and removing rotors quick and easy, thanks to the spine mount and lock ring design. Compatible with both resin or metal pads Includes external type rotor lockring Rotor Size (mm): 180 Hub Disc Compatibility: Center Lock Disc Pad Compatibility: All Pad Compounds Rotor Type: Two Piece