NEW Shimano GRX SM-RT64-M Disc Brake Rotor with External Lockring - 180mm, Center Lock, Silver variant-size-43-eu-mens Grippy tread design for optimum

Grippy tread design for optimum cornering

and dynamo cable routing

Simple on/off lever controls the internal clapper

68x110mm steel cups

Center and intermediate knobs on the Raddler are slightly taller than those on the original Riddler

NEW Shimano GRX SM-RT64-M Disc Brake Rotor with External Lockring - 180mm, Center Lock, Silver variant-size-43-eu-mens Grippy tread design for optimumThe 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