About BikePSI
Free bike tire pressure tools for every cyclist — no email, no registration.
What We Do
BikePSI is a free tool that helps cyclists find the right tire pressure for their bike. We cover every bike type — road, MTB, gravel, hybrid, e-bike, fat bike, cruiser, kids bikes and more. All calculators are free, run in your browser, and require no sign-up.
Our Calculators
Nine interactive calculators covering every setup, including dedicated tools built on the SILCA and SRAM tire pressure methodologies — the same algorithms used by professional cycling teams. Each calculator accounts for:
- Total system weight — rider, bike, gear and cargo
- Tire width, wheel diameter and ISO/ETRTO sizing
- Tubeless vs tubed setup (10% reduction factor)
- Surface conditions — road, gravel, dirt, snow
- Bike type — road, MTB, e-bike, fat bike, hybrid and more
- Discipline — XC, Trail, Enduro, DH for MTB
Guides & Reference Pages
Beyond calculators, BikePSI publishes in-depth guides covering every bike type, brand-specific PSI tables for 40+ bike brands, tire casing data for Maxxis, Continental, Schwalbe and more, and exact tire size references (700x32c, 29×2.4, 27.5", 20" and others). All content is researched and regularly updated.
Free & Privacy-Friendly
Everything on BikePSI is free. No email address required. No account to create. Calculations run client-side in your browser — your data never leaves your device.