Fourstroke 01 Headset Size:One Size the generous 760mm width provides

the generous 760mm width provides exceptional leverage for wrestling tough terrain

SHIMANO 11 and 12 speeds Direct Attachment and CAMPAGNOLO 12 speeds rear derailleurs are compatible with this dropout hanger

8° flare for added control

Finished with a standard 31

Fourstroke 01 Headset Size:One Size the generous 760mm width providesThe BMC Fourstroke eplacement headset kit fit headtube size 1. 5", 45 45 ACB (OD52. 0*ID28. 6). It includes 2x FSA MR170 (070E RS) bearings, an alloy H6153 crown race, and the alloy compression split ring. Every headset part of the headset assembly is including in this kit for Integrated System 52 (IS52 28. 6 IS52 40). 2x MR170 {070E RS} 52x7x45 45 bearings, alloy compression ring, crown race with integrated rotation stopper.