E-bike tyre pressure: what PSI should you run?

Read the sidewall first

Every tyre has a size and a pressure range moulded into the sidewall, for example 700x45c or 27.5x2.40, and min and max pressure in psi and bar. Stay within that range. Tubeless setups and some rims have their own maximum pressure too, often lower than the tyre's, so check the rim or wheel manual.

Size also tells you the wheel diameter and width, which you need when buying tubes or setting the display wheel size. Our assist levels and display settings explainer covers the wheel size setting.

If the sidewall is worn or hard to read, look up the tyre model on the maker's website, or check the bike manual, which usually lists the fitted tyre and its pressure range. Write the numbers down and keep them with your pump so you are not guessing each week.

Typical pressures by bike type

These are typical starting points. Your sidewall range always takes priority.

Adjusting for weight, load and surface

Change one thing at a time, by about 3 to 5 psi on narrow tyres or 1 to 2 psi on wide ones, and ride the same route to compare. On fat tyres even a small change makes a big difference, so a low-pressure gauge is useful.

Tubeless tyres usually run a little lower than tubed tyres of the same size, because there is no inner tube to pinch against the rim. Inserts or puncture-protection belts do not change the sidewall range, but they can make a tyre feel firmer at the same reading.

• Heavier riders and loaded bikes: higher in the range to prevent pinch flats and rim damage.
• Roads and cycle paths: higher pressure for lower rolling resistance and longer range.
• Gravel, towpaths and trails: lower pressure for grip and comfort.
• Wet roads: a few psi lower can help grip, but stay in range.
• Rear tyre: usually slightly higher than the front, as it carries more weight.

Why pressure affects range

Soft tyres deform more as they roll, which takes energy. The motor and your legs make up the difference, so the battery runs down faster. On road riding, keeping tyres at a sensible pressure is one of the simplest ways to protect range. Our range explainer covers other factors, and the battery and charge cost tool shows how energy use per mile changes range.

Tyre width matters as well. A fat tyre bike will always use more energy on tarmac than a hybrid, even at the right pressure; see fat tyre vs standard tyre e-bikes.

How to check and inflate

Good tyres and the right pressure make any e-bike nicer to ride. Our electric hybrid guide lists the tyre sizes each model uses, and the maintenance checklist puts pressure checks in a weekly routine.

1. 1

   Find the valve type: Presta (thin with a lock nut) or Schrader (like a car valve).

2. 2

   Use a track pump with a gauge, or a digital gauge, for accurate readings.

3. 3

   Check pressure when tyres are cold, before a ride.

4. 4

   Inflate to your chosen pressure within the sidewall range and refit the valve cap.

5. 5

   Check weekly; tyres lose pressure slowly even without a puncture.

Note:Never exceed the maximum pressure shown on the tyre or rim. Over-inflation can cause a tyre to blow off the rim. Avoid inflating bike tyres with high-volume garage compressors unless they have an accurate regulator.

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Frequently asked questions

What PSI should my e-bike tyres be? Within the sidewall range, usually higher on roads and with heavier loads, lower on trails.

Do e-bikes need higher tyre pressure than normal bikes? Often slightly, because they are heavier. Stay within the tyre's range.

What pressure for fat tyre e-bikes? Often around 5 to 20 psi, depending on surface and load. Check the sidewall.

How often should I check e-bike tyre pressure? Weekly, and before long rides.