Bike tyre sizes

Choosing 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.

Gravel bikes dominate 2025 - perfect for all terrains, from city streets to remote trails. Versatile, fun, and built for adventure, they're winning over every rider.