Road bike sizing

Choosing the correct frame size is a crucial component of getting the most out of your road bike. It's not just about comfort: when a road bike fits properly, it's more efficient, easier to handle and better at transferring your power to the road.

Bikes come in a range of sizes. The best fit for you depends primarily on your height and inside leg. That's true whatever your gender, as gender matters far less in finding the bike that's best for you than other factors.

Every rider deserves a bike that fits and feels great, no matter their body type, style of riding or level of experience. That's why we make great bikes for everybody and every body.

If you find that you're in between sizes, choose the smaller size for a more aggressive position if you are more flexible or prefer lower handlebars. Choose the larger size for a more relaxed position with higher handlebars. Or, talk to your retailer or our experts here at Trek HQ for a quick consultation.

The Trek Size Finder

This online tool helps determine the bike size that’s best for you. You’ll need a measuring device for your height and inside leg.

If you find that you’re between sizes, we recommend contacting your retailer or calling us on 10 045 2676 (M–F) for a quick consultation.

Road bike size chart

Expert advice from Trek

Online resources are great, but there’s nothing like a real person. You can connect with your local Trek retailer directly, call and chat online with us at Trek Headquarters.