It's equipped with updated Hard-Case Lite puncture protection and a lightly-treaded design for traction and confidence through every corner

Part Number: 1000400

Dual compound

Crampons: Whether on flat or inclined surfaces

Knock Block Headset Lockring Spacer waterproof matches It's equipped with updated Hard-CaseTrek 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