Road Bike Size Guide

Use our road bike size guide to find the perfect size for you. Choose the right size road bike and you’ll be more comfortable and more efficient, so you can go quicker, especially over longer distances.

It’s simple to work out the right road bike size for you. All you need is:

1. Your height & 2. Your inside leg length

Then, use the size charts below to match your measurements to the manufacturers recommended frame size

How do I measure my height?

With your shoes off, stand upright against a wall, with your shoulders back and legs together. Use a pencil to make a small mark on the wall above your head – make sure you hold the pencil parallel to the floor. Then measure from the floor to your mark, in centimetres or feet and inches.

How do I measure my inside leg length?

With your shoes off, stand upright with your back against a wall. Place a book/ruler between your legs, level with your crotch. Then measure from the floor to the top of the book/ruler, in centimetres or feet and inches (it’s easier if a friend helps).

How are Road Bikes Sized?

Road bikes are usually sized in centimetres, or using a S/M/L system. A road bike’s frame size is traditionally calculated by measuring the length of the seat tube, from the top of the tube (where the seat post inserts), to the centre of the front chainring. To keep sizing consistent across models, Compact road bikes (with a sloping top tube) are either sized using a S/M/L system, or are sized with a ‘virtual’ seat tube measurement based on a traditional (non-compact) frame. NB. Sizes can vary slightly between manufacturers.