Shimano 105 FC-RS520 12 Speed Crankset Size:172.5mm Rotor Thickness: 1

Rotor Thickness: 1

Please take the time to properly read the instructions to ensure the best performance

Additional M4x16mm cap screw is required

Improves climbing efficiency and reduces weight (~10 grams)

Keeping the EVA bulk to a minimum helps keep the overall weight of the Cobra9 SemiPro to a minimum – 30% less than most standard cycling devices

Shimano 105 FC-RS520 12 Speed Crankset Size:172.5mm Rotor Thickness: 1The elegant shape and the chic finish round off the overall high quality impression of this Shimano FC RS520 2 x 12 speed 2 PIECE crankset. Matches the new 105 Di2 R7100 group. Features The Science of Speed: Shimano 2x12 speed Crank FC RS520 The next generation: Shimano 105 featuring Di2 draws on the design philosophy The Science of Speed bringing fresh momentum, comfort and control. It lets you embrace an open road, full of infinite possibilities. Go