Wolf Tooth Headset Spacer Knock Block - 10mm, Blue Suspension Fork Tuning Kits Manufacturer Part Number: HSL947

Manufacturer Part Number: HSL947

Manufacturer Part Number: BALLRET1/4X7

Designed for 44/32/22 chainring combination

FX1991 FK0333

UPC: 888571052747

Wolf Tooth Headset Spacer Knock Block - 10mm, Blue Suspension Fork Tuning Kits Manufacturer Part Number: HSL947Wolf Tooth Headset Spacers for Trek Knock Block are machined in the USA out of aircraft grade aluminum. Compatible with Trek Knock Block system These spacers have unique raised features that key to Knock Block compatible stems (made by Bontrager) 1 1 8" top (straight 1 1 8" or 1 1 8" to 1 1 2" taper) steerer tubes only Product Specifics Color: Blue Material: Aluminum keyword search: Trek Knock Block Thickness: 10 S. H. I. S. Stem Clamp Diameter: 28. 6