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The Trek Knock Block adapter replaces one of your 10mm spacers
you'll get everything you need to start riding with your little one
X2 Swing Arm Rubber
X1 Shred Til Bed Carabiner
and enjoy bigger family rides together
SCOTT SYNCROS 1.5 - SHOTGUN PRO ADAPTER Jersey The Trek Knock Block adapterIf your bike has a Scott Syncros 1. 5 headset system, you will need this adaptor in order to fit your Shotgun Pro. Fitting the Shotgun Pro on a Scott bike with Syncros stem system requires a minimum of 15mm stem clearance (from headset to the bottom of the stem). The Shotgun Pro spacer (provided with your Pro seat) will replace two of your existing 5mm spacers, and the Scott Syncros adapter will replace one of your existing 5mm Spacers.