Stop guessing at the floor pump. This 2026 guide gives you exact starting PSI for 28, 30 and 32mm road tyres based on your total system weight (rider, bike, kit and bottles) for both tubeless and inner-tube setups. It also covers the hookless-rim safety limit you must never cross, and enough of the science to fine-tune from there. Every number below is current, pulled from this year's calculators and the 2026 Tour de France tyre data.

If you learned to ride when 23mm tyres at 110 psi were "correct," almost everything about that habit is now wrong. Modern road bikes roll on 28–32mm tyres at 60–80 psi, and on real roads those lower pressures are genuinely faster, not just comfier. Here's how to find your number and actually trust it.

Key takeaways

- Set pressure by total system weight (rider + bike + kit + bottles), not rider weight alone.

- Rough starting points: a 70kg system runs ~57/59 psi on 28mm tubeless, ~55/57 on 30mm, ~51/54 on 32mm (front/rear).

- Run the rear 3–5 psi higher than the front. It carries more of your load.

- Tubeless runs 5–10 psi lower than the same tubed setup.

- Hookless rims cap at 72.5 psi / 5.0 bar. Never exceed it, whatever your weight.

- Wider is the trend: the 2026 Tour peloton averaged a 30.29mm measured tyre width.

First, weigh the system, not just yourself

The biggest upgrade you can make to your pressure setup costs nothing: stop thinking about rider weight and start thinking about total system weight. That's you, plus the bike, plus everything bolted or strapped to it: bottles, tools, saddlebag, ride food, whatever's stuffed in your jersey pockets. A 70kg rider on an 8.5kg bike with two full bottles and a saddlebag is really an ~80kg system, and that bigger number is what your tyres actually hold up.

The major calculators (SILCA, Zipp and the rest) all build their starting-pressure guidance around system weight. That's the professional standard for a simple reason: the tyre doesn't know which kilograms are muscle and which are aluminium. It only feels the load pressing it into the road. Charts that ask for rider weight alone are quietly assuming an "average" bike and kit, and that assumption falls apart the moment you ride a heavier endurance bike, carry bikepacking loads, or race a sub-7kg climbing bike.

The load isn't split evenly, either. Your body sits back over the bottom bracket, so the rear tyre carries noticeably more weight than the front. That's why every credible guide sets the rear 3–5 psi higher (some push it to 5–10). Match the two and you'll over-inflate the front, throwing away grip and comfort exactly where you steer and brake.

Here's a mental model that keeps you honest between rides. BikeSize uses a 155 lb (70kg) rider on a 25mm tubed tyre at around 80 psi as its baseline, then adjusts roughly ±1 psi for every 10 lb (4.5kg) away from that. It's a rule of thumb, not gospel, but it tells you instantly which way to move when your loaded weight changes.

Quick system-weight checklist:

• [ ] Weigh yourself in full riding kit, shoes and helmet.
• [ ] Add your bike's real weight (not the marketing spec).
• [ ] Add bottles (two full bidons ≈ 1.5kg), tools, saddlebag, food.
• [ ] Use that total to read the tables below.
• [ ] Set the rear 3–5 psi higher than the front.

What's new in 2026

The reason your old pressure numbers feel wrong is that the whole road tyre category has shifted underneath them. Three changes define where we are in 2026, and each one pushes pressures down and widths up.

Wide is now the default. 28mm is the all-purpose baseline, 30mm has become the new normal on endurance and modern race bikes, and 32mm is increasingly standard for rough roads, cobbles and spring classics. Plenty of new frames now clear 35mm and beyond. The clearest proof came from the peloton itself: across a 26-tyre sample at the 2026 Tour de France, the mean measured width was 30.29mm, with 30mm nominal sizes slightly outnumbering 28mm.

Your "28mm" is probably a 30mm. Modern rims are wide. Internal widths of 21mm, 22–23mm, even up to 25.4mm are now common, and a wider internal rim stretches a mounted tyre well past its sidewall label. On today's rims a nominal "28mm" tyre often measures around 30mm, and a "30mm" can balloon to 31–33mm. The post-2020 ETRTO/ISO guidance is blunt about it: match rim and tyre, then set pressure by measured (calliper) width, not the number printed on the sidewall. A 2mm difference in real width is worth several psi.

Tubeless and hookless changed the ceiling. The industry's move to hookless rims brought a hard rule with it, a maximum of 72.5 psi / 5.0 bar, which we'll get into below. Pair that with wider tyres and you've effectively legislated lower pressures across the sport.

The product side tells the same story. On 10 March 2026, Continental launched the Grand Prix 5000 S TR in a 35mm size and added a 30mm option to the GP5000 TT TR, pushing its flagship tubeless road range wider than it's ever been. When the fastest tyres on the market keep growing, that's a strong hint the whole field has already moved.

Your starting pressure: the master table

This is the table you came for. Find your total system weight on the left, read across to your tyre width, and use the front/rear numbers for a tubeless setup. These are starting points, not final answers (you'll fine-tune in 3–5 psi steps later), but they'll drop you in the right neighbourhood right away.

Quick answer: A typical 70kg system on 28mm tubeless starts at about 57 psi front / 59 psi rear; on 30mm about 55/57 psi; on 32mm about 51/54 psi. Heavier riders add pressure, wider tyres subtract it.

Tubeless starting pressures, front/rear. Sources: SILCA/Zipp-based calculators.

Want it in bar? Divide psi by 14.5. As a sanity check against a French rider-weight chart (conseilvelo), a 75kg rider on 28mm lands around 5.8/6.2 bar and on 32mm around 4.4/4.7 bar, comfortably in line with the numbers above once you factor in bike and kit.

Two patterns make the table easy to extrapolate. Every 10kg of system weight adds roughly 5–8 psi at a given width, and going up a width (28→30→32mm) subtracts a few psi for the same weight, because the bigger air chamber holds the load at a lower pressure. Sit between rows? Say you're an 85kg system: split the difference and round to the nearest psi your pump can actually show.

Worked example: Maria weighs 62kg in kit. Her endurance bike is 9kg, and she carries two bottles and a saddlebag (~2kg), so she's a ~73kg system. On her 30mm tubeless tyres she starts at roughly 56/58 psi, then plans to try a couple of psi lower on her local chipseal.

Tubeless vs inner tubes: subtract 5–10 psi

If you run inner tubes, every number in the master table needs to go up. Tubeless setups run 5–10 psi lower than a comparable tubed setup at the same width and weight (some guides say 8–12 psi lower), because there's no tube adding friction and hysteresis, and no snakebite pinch flat to protect against. Lose the tube and you can safely lose the pressure that was insuring against it.

Rear pressures; add the tubeless offset (~5–10 psi) to get tubed equivalents. Front runs 3–5 psi lower.

A quick warning about the very high numbers you'll still see online. Some 2026 charts (Mondince, for one) list a 70–80kg rider running 95–100 psi on a 28mm tubed tyre and 80–85 psi on 32mm. Those are legacy-flavoured, tubed-and-hooked figures, and they sit well above the modern consensus. Treat them as a conservative upper ceiling for old-school tubed setups on hooked rims, not a target. If you're on tubeless (as most new wheels now are), start from the master table and work down, not from 95 psi and hope.

When should you lean toward the higher end of the tubed range? When you're on hooked rims with tubes, riding smooth tarmac at high average speeds, and you value flat protection over comfort. Lean low for the opposite: tubeless, rough or wet roads, comfort-focused endurance riding.

The hookless rule you must not break: 72.5 psi / 5.0 bar

This one is non-negotiable, so it gets its own section. Hookless road rims have a hard maximum of 72.5 psi (5.0 bar), regardless of tyre width or rider weight. Never exceed it. Unlike a hooked rim, a hookless rim has no bead hook to physically retain the tyre, so over-pressurising risks the tyre blowing off the rim, a sudden failure that can put you on the ground. The limit isn't a suggestion. It's an engineering ceiling.

Who does this actually constrain? Lighter and mid-weight riders on 28–32mm hookless setups will almost never get near 72.5 psi; their weight-correct pressures sit comfortably below it. The people who bump into the ceiling are heavier riders on narrow tyres. bikepsi flags 28mm hookless as ceiling-constrained above roughly 210 lb (95kg) system weight: the pressure the load wants would blow past 72.5 psi, but the rim simply won't allow it.

The fix is neat, and it lines up perfectly with the 2026 trend: go wider. A wider tyre supports the same load at a lower pressure, so moving from 28mm to 30 or 32mm brings a heavy rider's weight-correct pressure back under the cap with margin to spare. This is exactly why heavier riders on hookless wheels are told to run 28mm minimum, ideally 30–32mm.

Hookless safety checklist:

• [ ] Confirm whether your rims are hookless (check the manufacturer's spec — most modern wide rims are).
• [ ] Confirm your tyre is rated tubeless and hookless-compatible.
• [ ] Never inflate beyond 72.5 psi / 5.0 bar, whatever a weight chart says.
• [ ] If your weight-correct pressure would exceed the cap, switch to a wider tyre rather than under-tyring.

28 vs 30 vs 32mm: which width for which rider

Pressure and width are really one decision, not two. Pick the right width first and the pressure question mostly answers itself, driven by your roads, your goals and your weight far more than by tradition.

Choose 28mm if you ride mostly smooth tarmac, race criteriums or do a lot of pure climbing, and you want the lightest, most responsive feel with minimal aero penalty. It's the all-purpose baseline and still a great default for lighter riders on good roads.

Choose 30mm if you want the modern all-rounder, now the new normal on endurance and race bikes alike. It adds real comfort and grip over 28mm for a tiny weight penalty, handles mixed road quality well, and lets you drop pressure enough to smooth out chipseal. For most riders re-baselining in 2026, 30mm is the sweet-spot recommendation.

Choose 32mm if you ride rough or broken roads, do long endurance days, tackle cobbles or light gravel connectors, are a heavier rider (especially on hookless rims), or just want comfort and grip above all. The larger air chamber runs the lowest pressures on this chart, which is exactly what rough surfaces reward.

Decision shortcut: Smooth roads, low weight, racing → 28mm. Unsure or mixed → 30mm. Rough roads, comfort, or heavier/hookless → 32mm. Then read your pressure straight off the master table.

Why lower can be faster: impedance and breakpoint pressure

The counter-intuitive truth of modern tyre setup is that, on real roads, a harder tyre is not a faster tyre past a certain point. Understand why, and you go from someone copying a number to someone who can tune it.

On a perfectly smooth drum in a lab, higher pressure lowers rolling resistance. That's the old wisdom, and it's true, in the lab. But real roads have texture. Inflate a tyre too hard and it can't conform to that texture, so instead of the tyre soaking up small bumps, the whole bike and rider get bounced upward. That vertical motion is wasted energy, called impedance loss (or suspension loss), and it climbs steeply as pressure rises. Plot speed against pressure on real roads and you don't get a straight line. You get a U-shaped curve.

The bottom of that U has a name: breakpoint pressure. Below it, adding air reduces the tyre's internal casing losses and you go faster. Above it, surface impedance takes over and you go slower, while also beating yourself up and losing grip. The concept comes from Josh Poertner of SILCA, built on Tom Anhalt's engineering testing and later replicated at Zipp. Your goal isn't maximum pressure or minimum pressure. It's to sit at or just below the breakpoint.

How do you find it without a lab? Use the 15% tyre-drop rule (Frank Berto's work): a tyre performs best when its loaded deflection is about 15% of its height. On normal roads that target lands remarkably close to the impedance breakpoint, which is why the calculator numbers in this guide, all built on that principle, are also the fast numbers. For a concrete anchor: the sweet spot for a 75kg rider on 28mm tyres is roughly 65–80 psi (a little lower tubeless), nowhere near the 100+ psi of the old days.

Best of all, comfort and speed usually agree. The pressure that stops bouncing you around is the same pressure that rolls fastest. You rarely have to trade one for the other.

Fine-tuning: surface, weather, temperature and altitude

Your table number is a starting point. These adjustments are what turn a good baseline into a dialled-in setup, and they're exactly what most weight charts leave out.

Surface. Rougher roads want lower pressure so the tyre can conform and stay planted. If your local roads are chipseal, broken tarmac or throw in a gravel connector, start a few psi below the table and test downward until the tyre feels vague or squirmy in corners, then go back up a touch.

Wet weather. Drop about 2–4 psi in the wet to grow the contact patch and add compliance for grip on slippery roads. Small change, outsized effect on cornering confidence.

Temperature and altitude. Tyre pressure obeys the gas law. A ~10°C swing shifts pressure by roughly 3–4%, so a tyre set indoors on a warm morning reads lower once you're out in the cold, and a car-boot-warmed tyre reads high. Higher altitude also lowers effective pressure. If conditions move around a lot, check at the ride, not the night before.

How to test methodically. Change one variable at a time in 3–5 psi steps, ride the same familiar loop, and note how it feels through corners and over rough patches. When comfort improves and speed doesn't drop, you've found your number. Setting a wheel takes about 90 seconds, so there's no real excuse: check pressure before every ride, or at least every few rides, since tyres lose air on their own (tubeless a little faster).

Which calculator? For a precise starting figure, the big three are all worth a look:

Worth repeating: SILCA asks for your measured inflated width, not the sidewall label, a reminder that on wide 2026 rims, calliper reality beats the printed number. Take the calculator's output as your starting pressure and adjust from there in small steps.

Frequently asked questions

Q: What tyre pressure should I run on 28mm road tyres? A: By total system weight (tubeless, front/rear): about 53/55 psi at 60kg, 57/59 psi at 70kg, 63/65 psi at 80kg, and 72/75 psi at 90kg. Add roughly 5–10 psi if you run inner tubes, and keep the rear 3–5 psi above the front.

Q: What's the correct pressure for 30mm and 32mm tubeless road tyres? A: For a 70kg system, about 55/57 psi on 30mm and 51/54 psi on 32mm (front/rear). At 80kg, roughly 59/62 psi (30mm) and 55/57 psi (32mm). Wider tyres run lower than 28mm at the same weight because the larger air chamber supports the load with less pressure.

Q: Should the front tyre be lower pressure than the rear? By how much? A: Yes. The rear carries more of your weight, so set it 3–5 psi higher than the front (some riders run the front 5–10 psi lower). This improves front-end grip and comfort where you steer and brake.

Q: What is the maximum pressure for hookless rims? A: A hard limit of 72.5 psi / 5.0 bar, regardless of tyre width or rider weight — never exceed it, because a hookless rim can let the tyre blow off. Heavier riders who'd need more should switch to a wider tyre (30–32mm) to stay under the cap.

Q: How much lower should tubeless pressure be than inner tubes? A: Run tubeless about 5–10 psi lower (some guides say 8–12 psi lower) than a comparable tubed setup at the same width and weight. Without a tube there's less friction and no pinch-flat risk to protect against.

Q: Does lower tyre pressure actually make you faster? A: On real roads, yes, up to a point called the breakpoint pressure. Below it, extra air lowers casing losses; above it, the tyre can't absorb road texture and impedance (suspension) losses make you slower and less comfortable. The 15% tyre-drop rule targets that sweet spot.

Q: Why does my 28mm tyre measure 30mm? A: Wide modern rims (21–25.4mm internal) inflate a tyre beyond its sidewall label. A nominal 28mm often measures ~30mm and a 30mm can reach 31–33mm. Always set pressure by measured calliper width, not the printed number — it's why the 2026 Tour peloton averaged 30.29mm measured.

Q: How often should I check tyre pressure? A: Before every ride, or at least every few rides — it takes about 90 seconds per wheel. Tyres lose air naturally, temperature swings shift pressure 3–4% per 10°C, and tubeless setups seep a little faster than tubed.

The bottom line

Getting road tyre pressure right in 2026 really comes down to a short routine: weigh the whole system, read your starting number off the width-and-weight table, run the rear 3–5 psi higher than the front, drop 5–10 psi if you're tubeless, and never breach the 72.5 psi hookless ceiling. From there, the science gives you permission to go lower than you'd think. The breakpoint is where comfort and speed finally agree, and on today's wide tyres that number sits a long way south of the old 100 psi.

Set your baseline, test in 3–5 psi steps on your own roads, and check before you ride. Do that once, properly, and you'll never guess at the floor pump again. You'll just pump to your number and go faster for it.