Wolf Tooth Headset Upper Knock Block - 28.6 8mm Black MFPN=XTR9630 M5 (minus 5mm - Boost)

M5 (minus 5mm - Boost) is dished towards the frame for 52mm chainline for bikes with Boost spacing

Rotating articulating clamps allow for secure installation onto virtually any bicycle in a wide range of positions

The muddiest DH course conditions possible have inspired the Mota DH tire

Cartridge Type Threaded Included Cartridge Yes

Pad Compound Organic Defined Color Black Brake Lever Use Left Double or Triple Double Brake Lever Actuation Hydraulic Color Black Brake Caliper Mount Flat Mount Rotor Included No Includes Brake Disc Hydraulic Hose Length 950 Hydraulic Fluid Type DOT Rear Der/Shifter Compatibility SRAM Exact Actuation Drivetrain Speeds 11 Weight 334 Front Der/Shifter Compatibility SRAM Yaw FD/Shifter Compatibility SRAM Yaw Adjustable Contact Point No Adjustable Reach Yes

Wolf Tooth Headset Upper Knock Block - 28.6 8mm Black MFPN=XTR9630 M5 (minus 5mm - Boost)Wolf Tooth Headset Upper Knock Block 28. 6 8mm Black. Wolf Tooth Precision Headsets for Trek Knock Block are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. Available in a variety of colors to add some style to your bike. These upper headsets are for Trek frames with molded in internal bearing cups. Designed to work with Treks Knock Block system The top cap on these headsets have unique