How to Choose the Right Size Road Bike

Getting the right fit

Buying a new bike should be exciting – but with so many options, it’s easy to wonder which size is right for you. The good news is that choosing the correct size road bike is simple once you know what to look for. This guide explains the basics of bike geometry and how it affects your fit and ride.

Women-specific bikes

At Ribble, we design all our bikes to be unisex and fully customisable. The aim is to make sure the bike fits you – your body shape, size, and preferences. Key components like handlebars, stem and cranks can be adjusted for comfort and performance. A women’s-specific saddle is also recommended for the best fit.

What is bike geometry?

‘Geometry’ simply describes the measurements and angles that make up a bike frame. These details determine how the bike feels to ride, including your position, handling, and aerodynamics.

• Frame size: Different sizes change the length of key tubes, like the top tube. For example, an XS frame might have a 52 cm top tube, while an S frame has 53.5 cm.

• Rider position: A road racer may prefer a stretched-out position for better aerodynamics, while a leisure rider may want a more upright stance for comfort and stability.

• Handling: Geometry affects how sharp, stable, or responsive a bike feels – helping you find the right balance between performance and comfort.

Need more advice?

If you want to perfect your sizing and fit, the best option is to visit one of our Ribble showrooms. Our team of friendly experts are always on hand to offer personalised guidance, answer your questions, and show you the bikes in person.

Prefer to stay at home? Use our Live In-Store Expert service. Just click the icon at the bottom right of our site to start a one-way video call with one of our specialists. They can talk you through sizing, bike builds, and component choices – all from the comfort of your own home.

Learn more about Ribble bike sizing & fitting