Description
Description
If 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 remains directly under your stem.
If your stem clearance is less than 30mm you may need to create more space under your stem to fit the Shotgun Pro.
Product Reviews
Product Reviews
Sent directly from our partner
Sent directly from our partner
Special Order
Special Order
Special Order items are ordered for you from our supplier. Your whole order will be held until all items are in stock and will ship in 10-14 days.
If you are ordering other items which are in stock, you may wish to order those separately so they ship without delay.

