Bike Tire Pressure Calculator
Gravel-ready PSI in minutes—then validate your tire + rim compatibility and drivetrain choices in CrankSmith.
Next step: build the right bike setup
Get a starting PSI from the calculator, then move to standards + drivetrain matching so your pressure actually works with your wheels, tires, and gearing.
System Details
Tire & Rim
Conditions
Recommended Pressure
Optimized for speed & grip balance
Model confidence: Higher confidence on smoother surfaces. Start here, then fine-tune from ride feedback.
Balanced setup for mixed riding.
Confidence drops as terrain gets rougher or setup gets more extreme.
Rim Width Matters
Your 21mm rims make your 28mm tires behave like 29mm tires. We've adjusted for this.
Temperature
Tires gain ~1 psi (0.07 bar) per 10°F (5°C) increase. Check pressures before riding in the ambient temp you'll ride in.
Find your PSI—then build the setup
If you searched for a tire pressure calculator, start here: enter your tire + rim width, choose your terrain, and get a front/rear PSI starting point. Then validate compatibility and drivetrain choices so your pressure actually works with your wheels, tires, and gearing.
Quick navigation (for builders)
Gravel tire pressure (what this calculator optimizes)
Gravel riding blends comfort and control. This tool recommends front/rear PSI using your rider weight, tire width, rim (inner) width, terrain type, and whether you’re running tubeless. If you’re deciding your starting point, use it to dial in grip on rough sections while keeping efficiency on smoother lines.
Frequently asked questions
What PSI should I run for gravel?
Start by selecting gravel conditions, your tire width, and rim width. Heavier riders and chunkier gravel typically benefit from slightly higher pressure for support, while smoother gravel and lighter loads usually allow lower PSI for grip and comfort.Then dial in your setup with Gravel Standards.
Bike tire pressure calculator: what inputs matter most?
The biggest drivers are tire width + rim inner width (how your tire supports), rider (and bike) weight (load), and terrain/conditions (surface firmness). Tubeless vs tube changes how you can safely run pressure.Use those numbers to build the right bike.
Tubeless gravel: what pressure should I start with?
Use your tire width, rim width, and gravel conditions to get a first-pass recommendation—then adjust based on traction feel. If you’re getting harsh impacts or losing stability, increase pressure a small amount; if traction is great and the ride feels harsh, you can decrease slightly.Confirm compatibility with your components in Gravel Bible.
How does tire width change PSI recommendations?
Wider tires generally support more volume at lower PSI, improving comfort and grip on gravel. Narrower tires typically need higher pressure to avoid excessive squirm and bottoming.Pair your tire choice with the right setup using Gravel Standards.
Front vs rear tire pressure on gravel—same or different?
Usually not identical. Rider weight distribution often means the rear tire sees more load, so recommended pressure can be slightly different front vs rear for best comfort + control.Match your drivetrain + component choices with Gravel Bible.
Keep building your setup
Pressure is one piece. Lock in wheel/tire compatibility and matching drivetrain choices next.