Shotgun Replacement Trek Knock Block Adapter - Trek Knock Block Adapter Gift Card It's best suited for use

It's best suited for use on hard-hitting Trail and Enduro bikes

but for the price is justifiable

5mm (rear)

Who's this item for: Riders looking for a multi-tool that offers flexibility and broad functionality in an easy to carry package

Shotgun Replacement Trek Knock Block Adapter - Trek Knock Block Adapter Gift Card It's best suited for useIf your bike has a Trek Knock Block headset system, you will need this adaptor in order to fit your Shotgun Pro. Fitting the Shotgun Pro on a Trek bike with a Knock Block requires a minimum of 30mm clearance under your stem (from headset to the bottom of the stem). The Trek Knock Block adapter replaces one of your 10mm spacers, the Shotgun Pro spacer (provided with your Pro seat) replaces another of your 10mm spacers, one of your own 10mm spacers