Tubeless Tire Pressure Calculator
Enter your weight, tire width, surface and bike type for a personalized starting tubeless front and rear PSI and BAR — road, gravel and MTB, any tire brand.
Baseline Tire Pressure at 75 kg Total System Weight
700C wheels · high-performance tubeless · moderate pace (fast singletrack pace for MTB)
| Bike Type · Setup | Front PSI / BAR | Rear PSI / BAR |
|---|---|---|
| Road · 28mm, new pavement | 79.5 PSI (5.5 BAR) | 81.5 PSI (5.6 BAR) |
| Gravel · 40mm, Cat 1 hardpack | 40.5 PSI (2.8 BAR) | 42 PSI (2.9 BAR) |
| MTB · 61mm, Cat 3 rough trail | 13.5 PSI (0.9 BAR) | 14.5 PSI (1 BAR) |
Get Your Tubeless Tire Pressure
Enter your total system weight, tire width, surface and bike type, then pick a tubeless casing tier for a personalized starting front and rear PSI.
How to Use This Calculator
1Enter Your Total System Weight
Add up your body weight, bike weight and any gear you'll be carrying. Enter it in pounds (lbs) or kilograms (kg).
2Select Surface Condition
All 10 conditions are available here, from velodrome track to Category 4 gravel, since tubeless setups span every discipline.
3Measure Your Tire Width
20–65mm, covering road through MTB. Measure the tire's actual inflated width, not the number printed on the sidewall.
4Choose Wheel Diameter & Tubeless Casing Tier
Select 700C, 650C, 650B or 26", then high-performance, mid-range or puncture-resistant tubeless. There's no inner-tube option on this page.
5Set Average Speed & Bike Type
Pick your pace, then Road, Gravel or MTB for the correct front/rear split — this is the one calculator here where bike type stays selectable.
6Calculate & Use Your Results
Get a personalized starting front and rear PSI and BAR in one click, then copy or share the numbers.
How Tubeless Tire Pressure Works
Tubeless setups remove the inner tube's pinch-flat risk, which is what lets most riders comfortably test lower pressure than they'd trust on a tubed setup. That's a separate thing from what actually moves this calculator's number: casing quality. This page applies SILCA's methodology across three tubeless casing tiers, high-performance, mid-range and puncture-resistant, so you can see how casing choice moves your starting point.
Tubeless casing tier comparison (75 kg total system weight, 40mm gravel tire, 700C, Cat 1 hardpack)
| Casing Tier | Front PSI | Rear PSI |
|---|---|---|
| High-performance tubeless | 40.5 | 42 |
| Mid-range tubeless | 39 | 41 |
| Puncture-resistant tubeless | 36.5 | 38.5 |
| Mid-range butyl tube (for reference — not selectable here) | 38 | 39.5 |
Starting-point reference only — use the calculator above for your own weight and setup. Note that the butyl-tube row computes lower than two of the three tubeless tiers, not higher — casing quality drives this number, not tube vs. tubeless.
Hookless rims and pressure limits
Manufacturer pressure limits always override this calculator's output, and for hookless rims there's no single blanket number that applies everywhere. Published maximums vary by tire width and by manufacturer, so look up your rim manufacturer's hookless limit for your exact tire width and your tire's own sidewall maximum, then use whichever number is lower if it comes in under this calculator's starting point.
What going tubeless actually changes
Tubeless doesn't change the impedance-breakpoint math this calculator runs — a more supple casing computes a higher number and a stiffer one computes a lower number, whether or not it has a tube. What tubeless removes is inner-tube snakebite risk at a given pressure, which is why most riders who go tubeless end up comfortable testing lower than they would on an equivalent tubed setup. It doesn't remove every risk: casing damage, rim strikes, burping and loss of control at very low pressure can all still happen. Sealant volume doesn't factor into the pressure math either way; it only affects how well small punctures self-seal.
Why riders go tubeless anyway
- No pinch-flat risk from the tube itself, which is what lets most riders comfortably test lower pressure for grip and comfort.
- Comfort: at whatever pressure you land on, the tire absorbs more road or trail vibration than a stiffer tubed setup would.
- Fewer flats on the move: sealant closes most small punctures without stopping.
- Casing tier, not tube-vs-tubeless, is what actually moves the number — see the comparison table above for the real PSI difference at your setup.
Dial in discipline-specific setups using our specialized calculators: optimize asphalt speeds with the road bike tire pressure calculator, fine-tune dirt compliance using the gravel tire pressure calculator, or protect your rims with the MTB tire pressure calculator.
Still running inner tubes? The original SILCA tire pressure calculator includes mid-range butyl and latex tube calculations.
Frequently Asked Questions
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