Kids Ride Shotgun Pro Adaptor - Trek Knock Block - black

With the Shotgun Pro adapter, the Pro Front bike child seat can be easily mounted on your mountain bike with Trek Knock Block headset system. The 10 mm high adapter replaces one of the spacers mounted on the steerer tube. Compatibility: Shotgun Pro Front bike child seat for MTB Trek Knock Block headsets steerer tubes with 1 1/8" diameter required space on the steerer tube: 30 mm (measured from headset to lower edge of stem)