Bike Tire Pressure: The Free Adjustment That Changes Everything
How many bars for road, gravel and MTB, why overinflated is worse than soft, and how to find your ideal pressure.
Written by the editorial team at Velunite
There is one adjustment on the bike that costs nothing, takes two minutes, and changes grip, comfort and even speed: tire pressure. Yet most riders inflate 'by feel' or, worse, to the maximum printed on the sidewall, which is almost always too much.
The 'harder is faster' myth
For years people believed rock-hard tires rolled faster. On perfectly smooth tarmac that is even true, but real roads are full of micro-roughness: an overinflated tire bounces off every bump instead of absorbing it, and every bounce is wasted energy and lost grip. Testing and practice agree: the right pressure is almost always lower than you imagine.
Starting points for every bike
As a rough guide, for a 70 kg rider: road bike with 28 mm tires, around 5 bar front and 5.5 rear; gravel with 40 mm, around 2.5-3 bar; MTB around 2 bar or less. Heavier riders add a bit, lighter riders take some off. And the rear always runs slightly harder than the front, because it carries more weight.
Too soft: the warning signs
Going too low has its risks: the tire squirms in corners, the bike feels vague and imprecise, and on sharp potholes you risk pinching the tube between rim and obstacle. With tubeless the margin is wider, but the principle holds: if you feel the tire moving under you in corners, you went too far and need half a bar more.
In short
Get a pump with a gauge and experiment: start from the values above, then drop 0.3 bar at a time until comfort and grip improve without losing precision. It is the adjustment with the best time-spent to perceived-difference ratio on the whole bike.
Recommended products
Bike pump with pressure gauge: the basic tool for checking and inflating your tires correctly before every ride.
Digital bike tire pressure gauge: more precise than an analog gauge, useful for anyone who wants to dial in pressure carefully.
CO2 inflator for bikes: handy to carry on a ride for a quick top-up in case of a flat.
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