What pressure should I run in my road bike tires?

It depends mostly on rider-plus-bike weight and tire width, then on rim width, surface, and whether you run tubeless. As a conservative starting point for a 28 mm tire, riders of 70-80 kg including bike land around 58-70 PSI, lower with tubeless. These ranges follow Frank Berto's 15 percent tire-drop research; SILCA's calculator, keyed to measured width, typically recommends somewhat higher. Start from a weight-and-width number, not the sidewall, then fine-tune by feel.

Is the pressure printed on the tire the pressure I should use?

No. The number molded into the sidewall is a maximum safe pressure (and sometimes a minimum), not a recommendation. The right pressure for you is usually well below the maximum and depends on your weight, tire width, rim width, and the surface you ride.

Does higher tire pressure make you faster?

Not on real roads. Above what engineer Tom Anhalt named the break-point pressure, extra pressure stops lowering rolling resistance and starts raising it, because the tire vibrates over road texture instead of conforming to it. SILCA's field testing calls these vibration losses impedance, and found the penalty above the breakpoint is steeper than the penalty below it. The fastest pressure on rough pavement is lower than most riders assume.

How does temperature affect tire pressure?

Pressure tracks absolute temperature (Gay-Lussac's law), so the shift scales with the pressure itself: roughly 0.3 PSI per degree Celsius for a road tire near 70 PSI, about 0.17 PSI per degree Fahrenheit, and proportionally less at lower pressures. A tire set indoors on a warm morning can read several PSI lower on a cold descent, so it is worth checking, or compensating, when the temperature swings.

Tire pressure

Road Bike Tire Pressure: How to Find Your Number

The pressure molded into your sidewall is a ceiling, not a recommendation. Your real number is set by how much you weigh, how wide your tire and rim are, what you're rolling over, and how cold it is. Here's how those pieces fit together, and the published research behind each one.

Updated July 6, 2026

Forget the number on the sidewall

That "max 100 PSI" stamped on the casing is a safety limit, not advice. For decades riders pumped to it anyway, on the logic that a harder tire must roll faster. On a glass-smooth lab drum, that's almost true. On a real road, it's wrong, and the evidence has been public for years: SILCA's rolling resistance series recounts Zipp's Paris-Roubaix testing from 2007 and 2008, where lower pressures were consistently faster over rough pavement.

The right pressure is the one that lets the tire conform to the road's texture without wasting energy or risking the rim. For most road riders on modern wide tires, that's a good deal lower than tradition suggests.

The four things that actually set your pressure

1. Rider plus bike weight

This is the biggest lever. The tire has to support the load pressing down on it, so a heavier rider needs more pressure to keep the same amount of tire squash. Fitters call this tire drop, the percentage the loaded tire compresses versus unloaded, and the classic target of 15% comes from Frank Berto, the former Bicycling engineering editor who measured 50 tires across seven pressures and eight loads to build the first weight-indexed pressure charts. Weight also sits mostly over the rear wheel: Bicycle Quarterly measured a racing bike at roughly 40/60 front to rear, which is why your rear tire should usually run a few PSI higher than the front.

2. Tire width (and what it's mounted on)

A wider tire holds more air at a given pressure, so it needs less pressure to carry the same load. Moving from 25 mm to 28 mm or 32 mm can drop your ideal pressure by 10 PSI or more per step; Berto's own tables step down 12 to 16 PSI, and SILCA's calculator behaves similarly. Nor does the extra width cost you speed: lab testing of the same tire in four widths found rolling resistance essentially identical at equal comfort, and real-road testing found no measurable difference from 25 mm to 55 mm on smooth pavement. The internal width of your rim matters too: a wider rim spreads the tire, increasing its real-world volume and lowering the pressure it wants.

3. Surface

Smooth tarmac tolerates more pressure; chip-seal, broken pavement, and gravel reward less. On rough surfaces a softer tire absorbs impacts that a hard tire transmits straight into vibration, and vibration is lost energy. This is the break-point pressure, a term coined by engineer Tom Anhalt and explored in depth in SILCA's impedance research: push past the pressure where the tire stops conforming and rolling resistance climbs instead of falling. SILCA's field data adds a useful asymmetry: the penalty for being over the breakpoint is steeper than the penalty for being under it, so when in doubt, err low.

4. Temperature

Air pressure tracks absolute temperature, per Gay-Lussac's law, so the shift scales with the pressure itself: about 0.3 PSI per °C for a road tire near 70 PSI (roughly 0.17 PSI per °F), and proportionally less at lower pressures. Set your tires in a warm garage and start a cold descent and you may be several PSI lower than you think. Usually harmless, occasionally enough to matter on a tubeless setup near its floor.

Tubeless changes the floor

Without an inner tube there's no tube to pinch, so you can safely run lower, gaining grip and comfort. Published guidance clusters around 8 to 10 PSI lower on the road: Zipp suggests 10 or more, Hunt 8 to 10. The new limit becomes the tire squirming in hard corners or the rim striking through on big hits, not a pinch flat. We cover this in detail in our tubeless pressure guide.

A sane starting point

Treat these as conservative starting numbers for a smooth-to-average road, then adjust. They follow the Berto 15% tire-drop tradition and assume a rider of around 70–80 kg including bike and kit. (SILCA's calculator, which keys on the tire's measured width and surface category, typically lands 5 to 15 PSI higher; the point of starting low is that the breakpoint research says the expensive mistake is being over, not under.)

Tire width	Front (PSI)	Rear (PSI)
25 mm	68–75	72–80
28 mm	58–66	62–70
32 mm	48–56	52–60

Lighter riders go lower, heavier riders higher, tubeless lower still, rough roads lower again. These are anchors, not answers. The point is to start far from the sidewall maximum.

How to dial it in by feel

Start from a weight-and-width-based number, not the sidewall max.
Ride a familiar loop and notice the feel: does it skip and buzz over rough patches (too high), or feel vague and squirmy in corners and squashy on hard hits (too low)?
Adjust 2–3 PSI at a time and re-ride. The good range is wider than people fear; you're hunting for "planted and quiet," not a single magic number.
Keep front a few PSI below rear, and re-check when the weather or your tires change.

Sources

SILCA: Rolling Resistance, the History and Previous Works. The lineage of drum and field testing, Tom Anhalt's break-point pressure, and Zipp's Paris-Roubaix data.
SILCA: Rolling Resistance and Impedance. The field test showing total rolling loss is casing losses plus impedance losses, and why over-pressure costs more than under-pressure.
Frank Berto: All About Tire Inflation (PDF). The original 15% tire-drop research, 50 tires measured across seven pressures and eight loads.
Jan Heine, Bicycle Quarterly: Optimizing Your Tire Pressure for Your Weight (PDF). Tire drop by wheel load, and measured front/rear weight distribution (racing bike about 40/60).
Bicycle Rolling Resistance: Grand Prix 5000 in 23, 25, 28 and 32 mm. Lab data showing wider tires roll as fast or faster.
Rene Herse Cycles: Wide Tires Are NOT Slower. Real-road testing from 25 mm to 55 mm.
SILCA Pro Tire Pressure Calculator. A personalized recommendation keyed to measured width, surface category, and system weight.

Let the app do the math

Velo Garage builds your recommendation from weight-indexed pressure tables in the Berto tradition, then adjusts for your weight, tire and rim width, surface, tubeless setup, and the live temperature where you are, and learns your personal targets as you rate each run. One tap, per bike.