What tire pressure should I run on my mountain bike?

Start with total system weight (rider + bike + pack) in pounds divided by 7 for front psi, then add 2-3 psi for the rear. That's a baseline for a 2.4-2.5" tubeless tire — you'll tune from there based on how it rides.

Is the pressure printed on my tire sidewall accurate?

Ignore it as a target. Sidewall numbers are set for the heaviest possible rider on the harshest possible terrain, which isn't you most days. Owen treats max sidewall pressure as a ceiling, not a recommendation, and starts about 5 psi below it.

Should I run more pressure in the front or the rear tire?

Rear, by 2-3 psi. The rear carries more weight, takes harder square-edge hits, and is more prone to rim strikes and burping. Lower front pressure helps grip and steering feel.

How do I know if my tire pressure is too low?

You'll feel the tire fold or burp in hard corners, hear rim strikes on rocks, or notice vague, sloppy steering. If you're burping regularly, add 2 psi or move up to a stiffer casing rather than just pumping it up.

How do I know if my pressure is too high?

The bike feels dead, skips off roots and square edges instead of tracking through them, and your hands get buzzed after a tech descent. Drop 2 psi at a time until it calms down without feeling squirmy.

Do I need an insert like CushCore to run lower pressure?

Not for everyday trail riding — most riders are fine tubeless with a tough casing (EXO+, Double Down, or equivalent). Inserts earn their weight at bike parks, on DH days, and on sharp-rock terrain where rim strikes are constant. Owen runs CushCore for park days, not for Pisgah trail rides.

Should I change tire pressure for different terrain?

Yes, but in small increments. Owen shifts roughly 2-3 psi between loamy alpine (lower, for grip), desert hardpack (middle), and rocky chunk or bike park (higher, to protect the rim). Log what works at your home trails first, then adjust when you travel.

Mountain Bike Tire Pressure: An Honest Guide (Stop Guessing)

By Owen Carr · April 26, 2026 · 2 min read

You can spend $5,000 on a bike and still ride badly because your tire pressure is wrong by 5 psi. Owen has spent the last decade dialling in his pressures across Pisgah, Bend, Bentonville, and Crested Butte. The honest guide:

Start with the rider weight formula, then ride it

Total system weight (rider + bike + pack) in lbs ÷ 7 = front psi. Add 2-3 psi for the rear. That gets you in the ballpark for a 2.4-2.5" tubeless tire. From there, you tune.

The tuning loop

Set baseline. Ride a familiar trail.
If you're bouncing off square-edge hits → add 2 psi.
If you're burping the tire on hard corners → add 2 psi or move to a stiffer casing.
If the bike feels dead and unresponsive → drop 2 psi.
If your knuckles are vibrating after a tech descent → drop 2 psi.
Repeat.

Owen's actual numbers (180 lb rider, 32 lb bike, EXO+ casing, 2.5" Maxxis)

Pisgah/Bentonville chunk: 23 front / 26 rear. Bend / Sedona desert hardpack: 24 / 27. Crested Butte loamy alpine: 22 / 25. Bike park / DH days: 26 / 30 with a CushCore insert.

What to ignore

Sidewall pressure recommendations. They're for the heaviest possible rider on the most punishing trail. Drop 5 psi off the printed max as a starting point.

Tagged

Common questions

What tire pressure should I run on my mountain bike?: Start with total system weight (rider + bike + pack) in pounds divided by 7 for front psi, then add 2-3 psi for the rear. That's a baseline for a 2.4-2.5" tubeless tire — you'll tune from there based on how it rides.
Is the pressure printed on my tire sidewall accurate?: Ignore it as a target. Sidewall numbers are set for the heaviest possible rider on the harshest possible terrain, which isn't you most days. Owen treats max sidewall pressure as a ceiling, not a recommendation, and starts about 5 psi below it.
Should I run more pressure in the front or the rear tire?: Rear, by 2-3 psi. The rear carries more weight, takes harder square-edge hits, and is more prone to rim strikes and burping. Lower front pressure helps grip and steering feel.
How do I know if my tire pressure is too low?: You'll feel the tire fold or burp in hard corners, hear rim strikes on rocks, or notice vague, sloppy steering. If you're burping regularly, add 2 psi or move up to a stiffer casing rather than just pumping it up.
How do I know if my pressure is too high?: The bike feels dead, skips off roots and square edges instead of tracking through them, and your hands get buzzed after a tech descent. Drop 2 psi at a time until it calms down without feeling squirmy.
Do I need an insert like CushCore to run lower pressure?: Not for everyday trail riding — most riders are fine tubeless with a tough casing (EXO+, Double Down, or equivalent). Inserts earn their weight at bike parks, on DH days, and on sharp-rock terrain where rim strikes are constant. Owen runs CushCore for park days, not for Pisgah trail rides.
Should I change tire pressure for different terrain?: Yes, but in small increments. Owen shifts roughly 2-3 psi between loamy alpine (lower, for grip), desert hardpack (middle), and rocky chunk or bike park (higher, to protect the rim). Log what works at your home trails first, then adjust when you travel.

About the author

Owen Carr

Mountain bike + hiking writer · Asheville, North Carolina

Owen covers everything that goes uphill. He commutes by gravel bike, races XC on weekends, and just spent six months fixing the tech sections of his local Pisgah loop because it makes the descent feel earned.

IMBA Level 2 Mountain Bike Instructor. Pisgah local since 2017. Finished the AT in 2023.

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