What Tire Pressure Should I Run? The Tubeless Chart by Weight, Tire Size and Terrain

Find your pressure in three steps: pick your tire size below, find your total weight (rider + gear, not bike), read across for your terrain. Then apply the two safety checks under the charts — carbon rims and hookless rims have their own rules.

Road: 28C tubeless

Total weight (rider + gear)	Hard / smooth	Mixed / gravel / dirt	Wet / loose / rock
Under 65 kg	70–75 psi	65–70 psi	60–65 psi
65–80 kg	75–85 psi	70–80 psi	65–70 psi
80–95 kg	85–95 psi	80–90 psi	70–75 psi
Over 95 kg	95–105 psi	90–100 psi	80–85 psi

Road: 32C tubeless (the comfort choice)

Total weight	Hard / smooth	Mixed / dirt	Wet / loose
Under 65 kg	55–60 psi	50–55 psi	45–50 psi
65–80 kg	60–70 psi	55–65 psi	50–55 psi
80–95 kg	70–80 psi	65–75 psi	55–60 psi
Over 95 kg	80–90 psi	75–85 psi	65–70 psi

Gravel: 42C and wider

Total weight	Hard / smooth	Mixed / dirt	Wet / loose / rock
Under 65 kg	40–45 psi	35–40 psi	30–35 psi
65–80 kg	45–50 psi	38–43 psi	32–37 psi
80–95 kg	48–55 psi	42–48 psi	35–40 psi
Over 95 kg	55–60 psi	48–55 psi	40–45 psi

Tires over 45C: subtract 3–5 psi from the 42C numbers.

MTB: 2.35"–2.4" and wider

Total weight	Hard / smooth	Mixed / dirt	Wet / loose / rock
Under 65 kg	24–28 psi	22–26 psi	18–22 psi
65–80 kg	26–30 psi	24–28 psi	20–24 psi
80–95 kg	28–32 psi	26–30 psi	22–26 psi
Over 95 kg	30–35 psi	28–32 psi	24–28 psi

2.5" and fat tires: subtract 4–6 psi from the numbers above.

How to read your weight: the charts use rider + full gear (helmet, bottles, pack) — not the bike. On a boundary? Round up to the heavier bracket.

Carbon rims: three adjustments

· Start low. Within your chart range, begin 2–3 psi below the midpoint. Carbon is stiff but less forgiving of pressure mistakes than alloy.

· Respect the floor. Some ultralight carbon road rims specify a minimum pressure (around 58 psi / 4 bar on certain narrow deep models — model-specific, never universal). Below it, impacts reach the rim unhindered. Check your rim's spec sheet.

· Off-road, go lower — but not below the line. Drop 1–2 psi from the chart on gravel/MTB for grip; never below the manufacturer's minimum.

Quick adjustments riders ask about

Front vs rear: rear runs higher — 1–2 psi on road, 2–4 psi on hardtail MTB and gravel. The rear carries more of you.

Tubes instead of tubeless? Add 3–5 psi on road, 2–3 psi off-road, for the same tire.

E-bike? Add 5–8 psi overall, bias the rear — and both rim and tire must carry E-bike certification on carbon. Heavy e-bikes follow manufacturer specs, not chart arithmetic.

Hot day? Pressure climbs roughly 2.5 psi per +10°C — but only in the 60–90 psi road range; low-pressure gravel/MTB barely moves. Best practice: inflate cold, at riding temperature. Can't? Leave 2–3 psi of headroom on road setups.

Conflicting numbers? Tire sidewall says one thing, rim says another, chart says a third — use the lowest. That single rule resolves every conflict safely.

Why pressure matters (the 30-second version)

Tubeless lets you run lower pressure than tubes ever could — that's where the grip and comfort come from. But "lower" has a floor: too soft and the tire squirms, rolling resistance rises, and every rock edge hammers the rim (the "snake bite" that ruins carbon). Too hard and you've bought a tubeless setup to ride it like it's 1995 — skittish, harsh, and closer to the hookless ceiling. The chart puts you in the window; the rules above keep you inside it.

Save this page — pressures change with tires, terrain and season, and this chart covers every setup you'll run. Related tools: rim width and tire size pairing | hooked vs hookless rims | E-bike compatible wheels