Mark Nessmith · 11/4/2025
A guide to bike tyre size: How to measure and find your fitChoosing the right bike tyre size can transform your ride – boosting comfort, control and speed. Yet with so many numbers, letters and standards, it’s easy to feel lost. This guide demystifies tyre sizing, explains how to measure your own tyres and helps you pick the perfect fit for road, gravel and mountain biking.