Bike Tire Pressure Chart | Dial In PSI

Most riders get the best ride by matching PSI to tire width, rider weight, and terrain, then running a touch less air up front than in back.

Getting tire pressure right changes a bike more than most riders expect. A few PSI can make the ride feel planted and smooth, or harsh and sketchy. It also affects grip, rolling feel, flat risk, and how fresh your hands and legs feel after an hour on the bike.

That is why one magic number never works for everyone. A 60 kg rider on 32 mm road tires does not need the same pressure as a 95 kg rider on the same bike. Surface matters too. Fresh pavement likes more air than broken tarmac, gravel, roots, or wet dirt.

Use this page as a starting chart, not a hard rule. Your tire sidewall, rim maker, and tire maker set the safe pressure range. If those numbers clash, follow the lower limit. Trek’s tire sidewall advice matches that first step, and Continental’s ETRTO standards explainer also says never to go past the listed maximum.

Why Tire Pressure Changes The Ride So Much

Low pressure lets the tire mold itself to the ground. You get more grip, a calmer ride, and better control on rough surfaces. Go too low, though, and the tire can feel slow, vague in corners, or prone to pinch flats if you use tubes. On tubeless setups, going too low can lead to burps or rim strikes.

High pressure feels sharp and fast on glassy pavement, but there is a catch. When the tire gets too hard, it skips over rough patches instead of tracking through them. That can cut grip and make the bike feel nervous. Trek notes that both ends of the range have downsides: too little air raises flat risk and drag, while too much can make the ride bumpy with less traction.

How To Read Tire Width Before You Pick A PSI

Start with the size printed on the tire. A 700x28c road tire, a 700×45 gravel tire, and a 29×2.4 mountain bike tire all want different pressure. Wider tires hold more air, so they need less PSI to hold the same load.

Rim width can change the real tire width too. Continental notes that actual tire width shifts with inner rim width, so a labeled 28 mm tire may measure wider on one wheel than another. If your measured tire is wider than the label says, you can often drop a bit of air and keep the same feel.

Bike Tire Pressure Chart For Common Tire Widths

The chart below fits a typical rider and bike system weight of about 75 to 90 kg, or 165 to 200 lb. Use it as a first pump-up point. Then fine-tune from there. Tubeless setups can often start 2 to 5 PSI lower than tubes on the same tire size.

Tire Size And Use	Smooth Or Firm Surface	Rough, Wet, Or Mixed Surface
700×25 road	85–100 PSI	78–92 PSI
700×28 road	72–88 PSI	65–80 PSI
700×30–32 all-road	58–75 PSI	52–68 PSI
700×35–38 all-road / light gravel	42–58 PSI	36–50 PSI
700×40–45 gravel	32–45 PSI	28–40 PSI
700×47–50 gravel / commuter	28–38 PSI	24–34 PSI
29×2.1–2.25 XC MTB	24–32 PSI	20–28 PSI
29×2.3–2.5 trail MTB	20–28 PSI	17–24 PSI

If you weigh less than the chart range, start near the low end. If you weigh more, start near the high end. Then split the difference between front and rear. Most riders land with the rear tire a bit firmer since it carries more load.

How To Adjust The Chart For Your Setup

Your first ride tells you more than any chart. If the bike chatters over every crack, drop 2 PSI and ride the same loop again. If the tire squirms in hard turns or bangs the rim on sharp hits, add 2 PSI. Small moves work better than big swings.

Surface changes the number fast. On smooth road rides, many riders like a firmer feel. On patched pavement, gravel, or hardpack dirt, less air often feels faster and steadier because the tire stays in contact with the ground instead of bouncing across it.

Setup matters as well:

• Tubes: Stay a touch higher to cut pinch-flat risk.
• Tubeless: You can often go lower for extra grip and comfort.
• Loaded bikepacking or commuting: Add air for bags, racks, and water.
• Wet rides: Drop a little pressure for more grip, but stay inside the safe range.

Front And Rear Pressure Tweaks That Usually Work

The rear wheel carries more body weight, so rear pressure is usually higher. On narrow road tires, that gap may be 4 to 8 PSI. On gravel and mountain bike tires, the split is often smaller, closer to 1 to 4 PSI.

Use these changes after you pick a base number from the chart:

Situation	Front Tire	Rear Tire
Base setup from chart	Start at base PSI	Add 2–4 PSI
Tubeless setup	Drop 2–3 PSI	Drop 2–3 PSI
Rider under 70 kg / 154 lb	Drop 2–4 PSI	Drop 2–4 PSI
Rider over 90 kg / 200 lb	Add 2–5 PSI	Add 3–6 PSI
Wet pavement or loose gravel	Drop 1–3 PSI	Drop 1–2 PSI
Heavy bags or loaded rack	Hold steady	Add 3–5 PSI

How To Set Pressure Without Guesswork

Check pressure with a pump gauge or a separate digital gauge. A hand squeeze can catch a flat, but it is not precise enough once you care about ride feel. Pump the tires when they are cool, not after sitting in direct sun or in a hot car.

Temperature changes matter more than many riders think. Continental says a rise of 10°C, or 18°F, can add about 2.5 PSI inside the tire. That is enough to push a borderline setup into a harsh or unsafe range on a hot day.

Then do one short test loop and pay attention to three things:

• Does the bike skip and buzz over rough ground? Drop a little air.
• Does the tire feel vague in corners or slap hard on edges? Add a little air.
• Does the rear wheel feel harsher than the front? Lower the rear slightly, or raise the front only if it feels too soft.

Common Mistakes That Throw Off Tire Pressure

The biggest mistake is treating the sidewall maximum like the target. It is not. It is the ceiling. Many riders, especially on modern 28 mm to 50 mm tires, ride better well below that number.

The next mistake is ignoring tire construction. A supple road tire and a thick commuter tire in the same width may not feel right at the same PSI. Casing, tread, tubes, tubeless sealant, rim width, and rider position all change the feel.

One more mistake is setting both tires the same. That can work on some mountain bike setups, but on most bikes the rear still wants more air. Start with a small rear bump, ride, then tune from there.

A Simple Routine For Better PSI

If you want a repeatable method, keep it plain:

1. Pick a starting number from the chart for your tire width and surface.
2. Set the front tire there and the rear 2 to 4 PSI higher.
3. Ride one familiar loop, then change pressure in 2 PSI steps until grip, comfort, and control all click.

Write down the numbers that work for dry road, wet road, gravel, and loaded rides. After a few outings, you will know your own range, and that matters more than any generic chart ever will.