Gravel Tyre Width and Pressure Guide: The Setup That Matters Most

By Mike · Updated 27 July 2026

Here is the workshop truth that saves people money: on gravel, the tyres are the suspension, the grip and most of the comfort. The difference between the right and wrong tyre setup is bigger than the difference between a mid-range and flagship frame, and it costs a fraction as much. Get this page right before upgrading anything else.

Width: the comfort-versus-speed trade that mostly is not one

The old intuition says narrow is fast. On smooth tarmac there is something to it. On gravel it is backwards: a wider tyre at lower pressure rolls over rough surfaces instead of deflecting off every stone, and that smoothness is speed, along with grip and control. The practical limits are your frame's clearance and the surfaces you ride.

For the riding in our Melbourne gravel routes guide: rail trails and smooth graded roads are comfortable on 32 to 35 mm, the general Victorian mix of forestry roads and chunky gravel suits 38 to 45 mm, and genuinely rough terrain rewards the widest tyre your frame clears. If you are converting a road bike, clearance is the hard ceiling, which our conversion guide covers honestly.

Tread: match the surface, not the catalogue

Three families cover it. Slicks and file-treads roll fastest and suit rail trails, commuting and mixed rides that are mostly sealed. Small-knob all-rounders are the default for Victorian gravel: fast enough on the road sections, secure on loose-over-hard surfaces. Aggressive knobs earn their drag only in mud and steep loose terrain, so unless winter Dandenongs missions are your habit, the all-rounder is the answer. When in doubt, choose the faster tyre and let pressure do the gripping.

Pressure: the free upgrade almost everyone gets wrong

New gravel riders bring road habits and run their tyres rock hard, and their first rides feel like riding a jackhammer. Air is the adjustment. Lower pressure lengthens the tyre's contact with the ground, which is where all your grip and braking come from, and lets the tyre absorb what the frame cannot.

Method beats magic numbers: start from a published pressure calculator for your weight and tyre width, then drop pressure in small steps each ride. The bike will feel progressively more planted and quieter. You have gone too low when the tyre squirms in corners or you feel the rim strike on sharp edges; go back up a step. Front can run a little lower than rear. Write down what works, because you will forget by next season.

This is also the real argument for tubeless: it is not fashion, it is that the pressures gravel wants will pinch-flat inner tubes on square-edge hits. Sealant handling thorn and flint punctures is the bonus.

The two-wheelset trick

The highest-value upgrade for a one-bike rider: a second set of wheels or tyres. Fast slicks for the commute and road rides, gravel rubber for the weekend, ten minutes to swap. It is how a gravel bike becomes two bikes, as covered in gravel vs road.

Setup advice is part of what we do: bring the bike into Cheltenham and we will tell you what your frame clears, what width suits your riding and where to start with pressure, or browse gravel-ready pre-owned bikes that come set up right in the first place.