There is no single right tire pressure. The right number depends mainly on the load on the tire (rider, bike and luggage), the tire’s actual width, and whether you run tubes or tubeless. Treat any chart, including the one below, as a starting point, then adjust by feel. The one hard rule is the upper limit: never exceed the maximum pressure printed on the tire sidewall, and if your rim also has a maximum, stay under the lower of the two.
What pressure actually does
Pressure sets how much the tire deflects over bumps and how large the contact patch is. Too low and the tire squirms, feels sluggish and is more likely to pinch-flat (the tube gets squeezed between rim and ground). Too high and the ride turns harsh and the tire skips over rough surfaces instead of following them. Sheldon Brown’s tire guide makes the trade-off explicit: if you pump the tire up too hard, the ride becomes excessively harsh and traction is reduced.
On a perfectly smooth surface, more pressure can lower rolling resistance in theory. The same guide notes that real roads are not smooth, and that overinflation actually increases rolling resistance through vibration. That is why faster does not mean harder.
Starting pressures by width and weight
Tire maker Hutchinson publishes tables based on tire width and rider weight with equipment, in bar. The table below reproduces a selection (1 bar is about 14.5 psi). Hutchinson presents these as initial recommendations to fine-tune to your riding style.
| Tire width | Tubeless, 60 kg rider | Tubeless, 80 kg rider | Tubeless, 100 kg rider | Tube, 60 kg rider | Tube, 80 kg rider | Tube, 100 kg rider |
|---|---|---|---|---|---|---|
| 25/26 mm | 5.50 bar (80 psi) | 6.50 bar (94 psi) | 7.00 bar (102 psi) | 6.50 bar (94 psi) | 7.50 bar (109 psi) | Avoid |
| 28 mm | 5.00 bar (73 psi) | 6.00 bar (87 psi) | 6.50 bar (94 psi) | 6.25 bar (91 psi) | 7.25 bar (105 psi) | 8.00 bar (116 psi) |
| 32 mm | 4.00 bar (58 psi) | 5.00 bar (73 psi) | 5.50 bar (80 psi) | 5.50 bar (80 psi) | 6.50 bar (94 psi) | 7.00 bar (102 psi) |
| 40 mm | 2.00 bar (29 psi) | 2.25 bar (33 psi) | 2.75 bar (40 psi) | Not listed | Not listed | Not listed |
Three things stand out. Wider tires need much less pressure. Heavier riders need more. And for tubeless, Hutchinson’s figures sit about 1 bar (roughly 14 psi) below the tube-type figures for the same width and weight in the 25/26 mm row for a 60 kg rider, not 30 to 40 psi lower as is sometimes claimed. The gain from tubeless comes from running a little lower with less pinch-flat risk, not from dramatically soft tires. See Why Tubeless Tires Are Worth the Switch for the wider trade-offs.
Note the “Avoid” entries. Hutchinson lists some narrow tube-type tires as unsuitable for heavier riders; the fix is a wider tire, not more air.
Adjusting for conditions
- Smooth, dry pavement: Hutchinson suggests adding 0.50 bar.
- Rough surfaces: Hutchinson suggests removing 0.25 bar to improve grip.
- Front versus rear: Hutchinson suggests removing 0.25 bar from the front tire for comfort. Sheldon Brown notes that most bikes carry more weight on the rear wheel, so the rear tire should almost always run higher, typically by about 10%.
- Luggage, trailers and e-bikes: more total weight means more pressure. Charts that list only rider weight undercount a loaded cargo or e-bike, so use the sidewall range and the tire maker’s guidance for your tire.
Limits: tire, rim and hookless wheels
Printed maximums are limits, not targets. Sheldon Brown reports that tire makers commonly shoot for half of the real blow-off pressure, so the number carries a safety margin, but that margin exists for rims that fit badly or are defective. A tire that comes off the rim can cause a crash, so do not test it.
Hutchinson adds that for tubeless setups on hookless rims you should reduce by 0.25 bar and never exceed the maximum pressure indicated on the tire and rim. If the two maximums differ, the lower one governs. Check the rim’s marking or the wheel maker’s documentation, since the rim limit can be lower than the tire’s. If you cannot find a rim rating, ask the wheel manufacturer or a bike shop before inflating to the tire’s maximum.
Checking pressure
Squeezing a tire tells you almost nothing; use a pump with a gauge (see How to Choose the Right Bike Pump). Check before each ride, because the loss rate varies with tube material and tire. Sheldon Brown notes that latex tubes are commonly a bit more porous than butyl ones and need to have their pressure topped off more often. Gauges differ, so find your preferred numbers on one gauge and keep using it.
A tire that loses pressure noticeably within a day or two, or that is soft after a short ride, has a leak or a bad valve. Find it rather than topping up repeatedly; Flat Tire? Here Is Exactly What to Do and How to Prevent Punctures cover the next steps.
Finding your own number
- Read the sidewall range and any rim maximum.
- Take a starting value from a maker’s table for your width, weight and setup.
- Ride a familiar rough stretch. If the bike feels harsh or skittish, drop 0.2 to 0.3 bar. If the tire squirms in corners or you hit the rim on bumps, add a little.
- Note the result for front and rear, and recheck when your load, tires or season change.
Stop riding and have a shop inspect the wheel if a tire bulges, the sidewall is cut or cracked, or the tire repeatedly unseats from the rim.
Sources
Last reviewed: October 2026.