Bike mudguards: which type to choose and how to fit them

Three mudguard families

Choosing the right width Simple rule: the mudguard must be wider than the tyre (5–10 mm on each side), otherwise spray gets through. Measure your tyre width (e.g. 35 mm, 40 mm, 2.4") and check clearance with the frame/fork.

The importance of the flap Most of the water on your back comes from the rear. A long flap (reaching down) on the rear mudguard makes all the difference for commuting. At the front, a flap protects your feet and the bottom bracket.

Commuter tip If you switch bikes or setups often, clip-on models (like Ass Saver / SKS) fit in 10 seconds and stash in your bag. Less protective than a full mudguard, but zero hassle.

Unsure about compatibility with your frame? The mechanic AI checks based on your model and tyre width.