The Guide to Adult Bike Sizes and Fit

When it comes to the most enjoyable bicycle ride, the fit of your bike is important, so how do you know which bike is the best fit for you?

Schwinn bikes come in two variations; one size that fits the average population of adults, and bikes that come in different sizes just like clothes.

Bikes that Come in One Size

If you are an average-sized adult male or female, you will be able to fit 90% of Schwinn’s bicycles that come in a single size. Remember that bell curve they taught you in high school? You can think of Schwinn single sized bikes like that, with the average height of an adult male or female sitting at the top of the curve.

This means that if you are a taller woman it may make more sense for you to choose a “men's” bike which has a larger frame than the “women's” model, and vice-versa.

Bikes That Come In Sizes

If you are looking for a more perfect fit you can buy a Schwinn bicycle that comes in a variety of sizes. In general, the following height ranges apply for Schwinn bicycles that come in sizes.

Bike Size

Extra Small




Extra Large

Seat Tube Length






Rider Height Range

5'0" - 5'3"

5'3" - 5'7"

5'7" - 5'10"

5'10" - 6'1"

6'1" - 6'4"

Pro Tip:
Kids' bike sizes are often indicated by wheel size, but the size of the frame is what matters most for adult bikes and changes to accommodate taller riders.

What if I got my bike size wrong?

If you are riding a bicycle that is just a bit too small or too large, don’t worry, you can still get a proper fit by making a few small adjustments:

  • Move your bike saddle forward or back to adjust your hip position when sitting down.
  • Buy a longer or shorter stem to adjust the reach to your handlebars, or the angle at which your handlebars sit.
  • Buy a different bicycle seat post: you can adjust the height with a longer, or shorter seat post. They also make posts with different amounts of offset forward and back to help adjust your position on the bike.
  • Give it time. Sometimes a new bike or position (due to frame geometry) can take some time to get used to.

If you have any questions, our customer service team is available to answer questions.

View the guide for kids' bike sizes.