Knock Block Headset Lockring Spacer Size:28.6 mm (1-1/8") PolyLube 1000™ has an extremely

PolyLube 1000™ has an extremely high shear strength to protect vital parts under extreme conditions

the Stumptown combines classic style with leading-edge performance

Buckle: ITW Nexus Airloc side-release buckle

lightweight fit system with an easy-to-turn rubber over molded dial for adjustments

Trust the Bum

Knock Block Headset Lockring Spacer Size:28.6 mm (1-1/8") PolyLube 1000™ has an extremelyTrek Knock Block Headset Lockring Spacer Genuine replacement parts Service and replacement parts specifically for Trek Knock Block Technology. Product details For locking steer tube to the headset bearing cover and frame chip Only for use with Trek Knock Block systems Specifications Model Trek Knock Block Lockring Spacer Steerer outer diameter 28. 6mm (1 1 8") Thickness 10mm