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Kids Mountain Bike Sizing Guide

Welcome to the kids mountain bike sizing guide! This is where things start to become a little more specialist – so if your child is below the age of 5, we recommend looking at the “standard” kids bike sizing guide instead. We carefully select a small range of proper kids mountain bikes every year to ensure that it isn’t just the adults who have all the fun.

We hope the guide is helpful, and if you’d like to talk to one of our friendly team for advice then please don’t hesitate to contact us.

Approx. Age Rider Height Wheel Size Bike
5 - 8 3' 11" - 4' 3" 119 - 130cm 20" Saracen Mantra 2.0
8 - 12+ 4' 2" - 4' 8" 127 - 142cm 24" Saracen Mantra 2.4
4' 1" - 5' 0" 125 - 152cm 26" Whyte 403
Whyte 405