With the Shotgun seat and handlebar combo, you'll get everything you need to start riding with your little one and create a lifelong passion for the outdoors. Designed for children 2 – 5 years (up to 48lb ​/​ 22kg) Frame mounted with full rubber protection (for alloy or carbon frames) Easy installation and removal Adjustable width and angle to fit all modern mountain bikes Shotgun bars fit 25.4mm, 31.8mm and 35mm handlebar diameters Watch install video here https://www.youtube.com/watch?v=CfSwmmGcz_Q