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    Size is the most important feature to get right when deciding on a bike for your child. If the bike is too big or too small, it can ruin their first experience and possibly lead to accidents. The guide below will explain how to choose between the Guardian 20 inch and Guardian 24 inch bike for your child. 

    Tire Size Seat Height* Inseam* Height*
    20 inch 22.5" - 28" 19.5" - 24" 45" - 53"
    24 inch 25" - 33" 22" - 28" 50" - 61"


    1. Seat Height: measured from the seat in the lowest position to highest position
    2. Inseam: inseam length of the child
    3. Height: estimated height of the child


    Measuring your child's inseam is the most accurate way to decide which bike to purchase. To do this, follow the steps below.

    1. Have your child stand against a wall with their feet shoulder width apart.
    2. Place a book between your child's legs
    3. Measure from the ground to the top of the book

    Inseam is the most accurate measurement because you are able to compare the inseam length to the seat height of the bike. Kids that are more experienced or eager riders are able to ride bikes with a seat height 2" - 3"  more than their inseam. Less experienced or timid riders should start on a bike that has a seat height no more than 1" - 2" more than their inseam.


    Most of the time, knowing your child's height will be good enough to choose the right size bike for them. If you would like to order based on height, we suggest going to the homepage of our website and using our right fit guide. Simply enter your child's height to get recommendations and estimates of how long the bike will last.


    1. How long will the bike last my child? 

    A. Kids grow about two inches per year in height and one inch per year in inseam length. You can use this to estimate how long the bike will last your child. 

    2. My kid has a 22" - 22.5" inseam, should I choose a 20 inch or 24 inch bike?

    A. We almost always advise parents to choose the 24 inch bike since this bike will last your child longer. If your child is extremely timid about riding a bike, then we suggest the 20 inch bike. Please note, if you go with the 20 inch bike, it will comfortably last around 2 years.