kids' mountain bike. That is what the Off 4 brings for riders aged 6 to 8 who are ready for actual trails. The Schwalbe Rocket Ron 20 x 2. 25"" tires with Addix Speed compound deliver low rolling resistance on hardpack and real grip when the trail gets loose. Promax hydraulic disc brakes with 140mm rotors front and rear stop confidently without demanding serious grip strength. Nine speeds through Sram X5 give enough range for climbs and descents, and the flip-flop stem adjusts handlebar height in two positions without additional hardware. Tubeless-compatible rims and thru axles round out the build. Heads up - We do our best to keep bike specs and images current, but occasional component changes can happen without warning-and sometimes the photos might not show the exact build you'll receive. If you want to double-check the details, our Gearheads are always here to help.