Free Online Calculators
Calculate ideal tire pressure instantly with SILCA calculator. Get accurate PSI for road, gravel & MTB for better speed, grip & comfort.
Enter your setup below for front and rear PSI and bar. Always stay within rim and tire pressure limits.
Recommended pressure
Enter total weight, tire width, and every option, then click Calculate for front & rear PSI and bar.
How useful was this calculator for you?
This professional cycling pressure tool is built on SILCA's real-world research and wind tunnel testing data. It calculates separate front and rear PSI for road bikes, gravel bikes, MTB, and cyclocross. It supports clincher, tubeless, and TPU tube setups.
Unlike basic pressure charts, this PSI calculator factors in eight variables simultaneously. Weight distribution on a bicycle is never equal, so your front and rear tires always need different pressures. The tool handles this automatically.
Real-world testing shows that even a 2 PSI adjustment can completely change your ride feel — especially on rough or mixed surfaces.
From real-world riding, slightly lowering PSI on rough roads improves comfort without sacrificing speed — a small change most riders overlook.
Core logic:
PSI = (System Weight × Weight Distribution %) ÷ (Contact Patch Factor × Surface Coefficient)
Recalculate whenever you switch surfaces or seasons.
Use this as a quick reference before calculating your exact PSI:
| Bike type | Tire setup | Front PSI | Rear PSI |
|---|---|---|---|
| Road bike | Clincher (butyl) | 72–88 | 78–95 |
| Road bike | Tubeless | 65–80 | 70–85 |
| Gravel bike | Tubeless | 28–38 | 32–42 |
| Gravel bike | Clincher | 35–48 | 40–52 |
| MTB hardtail | Tubeless | 20–28 | 22–30 |
| MTB full suspension | Tubeless | 18–25 | 20–27 |
| Cyclocross | Tubeless | 25–33 | 28–36 |
| Hookless rim | Tubeless only | Max 73 PSI | Max 73 PSI |
Always cross-check against your rim and tire manufacturer's maximum rating.
Use this professional bike tire pressure calculator before every ride to maximize speed, comfort, and grip. Enter your system weight, actual tire width, surface type, and tire setup to get precise front and rear PSI instantly. Even a small 2 PSI change can significantly impact your performance on road, gravel, or trail.
Recalculate your PSI whenever your weight, terrain, or tire setup changes to always maintain optimal performance.
Always verify output against your rim and tire manufacturer's stated maximum PSI — especially on hookless setups.