Cane Creek's 40 Series headsets strike the perfect balance between performance

Rim Compatibility: Alloy only

and more than your fair share of bails and close calls

XX1 and Truvativ AKA GXP cranks

Featuring a dual phased-pawl drive mechanism accomplishing 90 POE and 4degree engagement by way of a six pawl driver and 45 tooth drivering

Shimano TOURNEY TX800 English SQUARE-JIS 73x118mm Bottom Bracket can be discounted Cane Creek's 40 Series headsetsSHIMANO Square Type Bottom Bracket MTB Standard Structure. Square Type Bottom Bracket SHIMANO quality performance cartridge bearing square bottom bracket Better chainline stability with chain line stabilizer 3 structures available Standard, E type, chain case options Adapter material: Aluminum