Online cycling tools
Tyre pressure calculator.
Estimate a starting pressure from measured tyre width, rider and bike weight, rim width, casing setup, and road surface.
Load
Rider
Wheel setup
Tyres & rims
Measure actual width
Use the tyre width after inflation. Printed sidewall size can be off by a few millimetres.
Use a reliable gauge
Check with the same gauge each ride. Small pressure differences are easier to feel than guess.
Load changes the patch
Front and rear numbers differ because each wheel carries a different share of system weight.
Front
Rear synced
Bike
Ride profile
Surface
Ride surface
Tyre system
Setup
Setup matters
Tubeless setups can usually start lower, while hookless rims must respect the lower tyre or rim max pressure.
Feel
Fine tune
Set pressure cold
Inflate before the ride, then check again with the same gauge after adjustments.
Recheck after tyre changes
A wider measured tyre usually needs less pressure than a narrower one.
How to use this
- Check the tyre and rim maximum. Use the lower number.
- Use a reliable gauge; floor pump gauges can drift.
- Adjust after the first ride: lower for chatter, higher for strikes.
Why this changed
Next step
Pressure depends on the parts around it.
If the result feels too high, too low, or close to a tyre limit, check tyre width, rim width, tubes, valves, sealant, and pump accuracy before buying.
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