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20" Large Bike

Technical and setup help for your 20" large Guardian bike.

Front brake is not working

Are the front brake arms not moving when you pull the brake lever?. Don't worry, it's likely that the front brake actually is working! See the video here to learn how the SureStop Brake System operates. Please note: the bike has to have weight on it

Pedals

Click here to start our Pedal troubleshooting guide. The right pedal tightens clockwise and the left pedal tightens counter-clockwise. This allows both pedals to stay tight as your child rides! If the pedals are not labeled, you can find whether it's

Shifting and gears diagnostic tool

Click here to start our shifter troubleshooting guide. This guide will help you adjust your shifting by fixing your derailleur or shifter, if your chain is falling off, or if you need help replacing your shifter. Most shifting problems occur if. 1. T

Rear brake

Click here to start our Rear Brake troubleshooting guide. If you are noticing the rear brake is clamped down on the wheel, check the handlebar rotation. Make sure nothing is pulling on the brake line Your handlebars may be rotated 360 degrees. Don't

Training wheel installation (geared bike)

Here's how to install training wheels on a geared bike:.

Raise handlebar

Tire and tube

Click here to start our tire and tube repair guide. Our 20" bikes have 20 x 1.75" tires and inner tubes. Tube not holding air?. It's an inconvenience, but occasionally, tubes may fail to hold air. Don't worry; we're here to assist you in resolving th

Front brake is rubbing on both sides of the wheel

When the front brake is rubbing on both sides of the wheel, it's likely the front fork needs to be rotated to unwrap the brake cables.

Saddle and seatpost help

Click here to start our Seat and Seatpost guide. How to raise or lower the seat and tighten clamp:. Damaged seat? Reach out to our support team for more help: Contact Us

Front brake engages while turning

First, ensure the front brakes are facing forward, not towards the frame. If the brake arms are facing the rear of the bike like in the image below, you will need to take off the handlebar and rotate the front of the bike 180 degrees so that the brak