Sizing Help

Guide to Kids' Bike Sizes

Not sure which bike size is the right fit for your child? Our kids' bike size chart will help you determine the correct size bicycle that your child needs. 

Charles Luiting

Time for your child’s very first bike, or maybe something new in a larger size? Finding a bike that fits doesn’t need to be difficult. We’re here to help.

Q: What are the sizes based on?

A: Kids' bike sizes are best determined by wheel size. This directly correlates to the frame size: as the diameter of the wheel increases, so does the frame size of the bicycle.

Q: Do bike sizes correlate to kids’ ages?

A: Yes and no. You can often estimate what size bike your child will need based on their age, but the best way is going by their height. Kids’ heights can vary quite a bit, what with the growth spurts and all, so using their height instead of age will provide a much more accurate way to determine the appropriate bike size. And of course, you should have your child test ride the bike before purchase when possible.

Check out our handy size chart to determine the right size for your child.

Schwinn SmartStart

Parents are often concerned that their child will grow out of a bicycle too quickly. Schwinn SmartStart is our solution to help your child’s bike “grow” with them.

SmartStart bikes deliver fun that fits. When you raise the seat of a SmartStart bike, the angle and distance between the seat, handlebars, and pedals also increase. This means the bike can still provide a good fit for your child as they grow taller.

All Schwinn kids bikes from size 12” - 20” now come with SmartStart technology, as designated by the SmartStart logo on your child’s bike.

Check out our Schwinn SmartStart page

Once you find the right bike size for your child, you’ll be ready to shop.  But don’t worry, you’re not on your own.  Check out our guides on bike assembly, helmet fitting, the ins and outs of training wheels, and how to tech your child to ride. They’ll be ready to ride in no time!

Sizing Help

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