How to Fit Training Wheels and a Kids Guidance Bar
By Bicycle Superstore | Published: 2026-11-01
Category: How-to Guides
A step-by-step guide to installing training wheels and a guidance bar on your child's bike, with checkpoints to avoid common mistakes and build confidence.
Quick answer
Fit the training wheels first, checking axle length and chainstay clearance, then attach the guidance bar to the seatpost and adjust it to a comfortable height. Always test the setup with your child before riding.
Why fit the guidance bar after training wheels
Training wheels keep the bike stable, so you can focus on guiding rather than balancing. The guidance bar gives you a safe handhold without bending over, but it must be fitted after the training wheels so the bike sits level and the bar height is correct.
If you attach the guidance bar first, you may set it too low or high once the training wheels lift the rear end. Always install training wheels first, then adjust the bar with the bike on level ground.
When training wheels won't fit
Some kids' bikes have short axles or obstructions on the chainstay that prevent the stability brackets from sitting flush. In that case, do not force the fit; consider a different bike or a balance bike approach.
The Sunnywheel Training Wheels fit most 12" to 20" bikes, but you must confirm axle length and chainstay clearance before installation. If the brackets can't sit flat, the wheels may wobble or damage the frame.
Step-by-step installation
- Check axle length and chainstay clearance: Remove the rear axle nuts and test-fit the training wheel brackets. The axle must extend far enough to secure the bracket and nut safely, and the bracket must sit flat against the frame without hitting the chainstay. If the axle is too short or the bracket doesn't sit flush, do not install—consider a different bike or balance bike.
- Mount the training wheels: Place the bracket over the axle, reinstall the axle nut, and tighten securely. Repeat on the other side. Adjust the height so both training wheels touch the ground evenly when the bike is upright. Spin each wheel—it should turn freely without rubbing the frame or chain.
- Attach the guidance bar to the seatpost: Assemble the Alloy Kids Guidance Bar according to its instructions, then clamp it securely to the seatpost at a height that lets you hold it without stooping. Tighten all bolts. Check that the bar cannot rotate or slide on the seatpost when you apply downward pressure.
- Adjust training wheel height: With the bike on level ground and your child seated, adjust both training wheels so they are just touching the ground—about 3–5 mm of clearance is ideal. This allows the bike to lean slightly into turns while still providing stability. Too much clearance makes the bike unstable; too little lifts the rear wheel and reduces traction.
- Test the setup: Have your child sit on the bike while you hold the guidance bar. Rock the bike gently to check stability, then walk alongside as they pedal. Ensure the training wheels stay in contact with the ground and the bar remains secure. If the bike tips easily or the bar feels loose, stop and re-adjust before riding further.
Product facts
- Alloy Kids Guidance Bar: Lightweight alloy construction that separates into two pieces for storage or transport. Makes it easy to stash in a car or garage and reduces weight on the bike.
Alloy Kids Guidance Bar - Sunnywheel Training Wheels: Heavy-duty training wheels suitable for bikes from 12" to 20", fitting most children's bikes if the axle is long enough and there are no chainstay obstructions. Check axle length and chainstay clearance before buying to ensure a safe, stable fit.
Sunnywheel Training Wheels
