Bike Tire Pressure Calculator
Get a sensible starting tire pressure for front and rear based on your weight and tire width.
How to use the tire pressure calculator
- Enter your weight and bike weight.
- Enter your tire width in millimetres.
- Click Calculate for suggested front and rear pressures.
Lower than you think is often faster
Modern thinking favours slightly lower pressures than tradition, because they roll faster on real roads and grip better. Never exceed the maximum printed on the tire.
Why lower pressure is often faster
Cyclists once pumped tyres rock-hard, but research shows that beyond a point, higher pressure increases vibration losses on real roads and actually slows you down, as well as harming comfort and grip. The fastest pressure is the one that balances low rolling resistance with control for your weight and tyre width.
Weight and width set your pressure
Heavier riders and narrower tyres need more pressure; lighter riders and wider tyres need less. This calculator gives sensible starting points front and rear, recognising that the front carries less weight and benefits from slightly lower pressure for grip and comfort.
Frequently asked questions
What tire pressure should I run?
It depends on weight and tire width — heavier riders and narrower tires need more pressure. This tool gives a starting point; fine-tune for comfort and grip.
Should front and rear be the same?
The rear carries more weight, so it usually runs a little higher than the front. The calculator reflects that split.
Is higher tyre pressure always faster?
No. Beyond an optimal point, higher pressure increases vibration losses on real roads and reduces grip and comfort, often making you slower, not faster.
Why run different front and rear pressures?
The rear wheel carries more of your weight, so it needs more pressure. A slightly softer front improves grip and comfort without much rolling penalty.
How does tyre width change ideal pressure?
Wider tyres hold more air volume, so they need less pressure to support the same load. That is why modern wide tyres run far lower pressures than old narrow ones.
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