Tire Pressure Calculator
The right pressure is a balance of rolling resistance, comfort and control — and it depends on how much you weigh, how wide your tires are, and what you're riding on. Enter your setup for a starting point.
Your setup
Recommended pressure
The rear runs ~10% higher than the front because it carries more of your weight. Treat these as a starting point: if the tire squirms or you pinch-flat, add a few PSI; if it feels harsh or slides on rough ground, drop a few PSI.
How this is calculated
A transparent model in the spirit of SILCA's pro calculator. Wider tires run lower; more weight runs higher; rougher surfaces run higher for control and puncture protection. The rear is set above the front to match its greater load.
- Base pressure from tire width (narrower = higher).
- Weight adjustment: ~+5 PSI per 10 kg above an 80 kg system (and vice-versa).
- Surface adjustment: +10 PSI rough road, +20 PSI gravel, +30 PSI MTB.
- Wheel adjustment: +3 PSI for 650b / 27.5" (smaller wheels like a touch more pressure).
- Front = 95% of total, Rear = 110% of total.
References
This tool uses a simplified, transparent version of the approach popularised by SILCA and widely used by pro mechanics.
- SILCA — "Pro Tire Pressure Calculator" — the professional reference for rider weight, tire width, surface and wheel-size based pressure.
- Tritirera — tire pressure & comfort calculators — independent pressure guidance by weight and tire volume.
No calculator replaces feel. Check pressure cold, re-check after big weight changes or new tires, and remember that lower pressure is safer than too-high on rough ground (too-high risks pinch flats and loss of control).