The shotgun seat is designed for kids 2 -5 years of age, and up to 22kg. The shotgun seat fits all mountain bikes. Front mounted child seat for kids 25 years Full rubber protection (for alloy or carbon frames) Adjustable width and angle to fit all mountain bikes Quick release fitting for easy installation and removal The shotgun seat fits all mountain bikes. However it will not fit hybrid, road or electric bikes. "Ive tried a few seats and this is by far the best. Plus my daughter absolutely loves getting out on the trails with me. Easy to get on and off with no problems on my carbon frame. I highly recommend." Paul Greenwood