Motorcycle Tyre Pressure Converter
Protect my motorcycle with GeoRide
Par ThomasYour manual gives tyre pressures in bar, your gauge reads in psi? This converter does the maths both ways, instantly: enter your value, choose the direction, and you get the exact equivalent so you can inflate your tyres to the pressure recommended by the manufacturer.
Key takeaways
- 1 bar = 14.5 psi: the one figure to remember to check a conversion in your head.
- The reference pressure is the manufacturer's, always measured cold.
- One check a month, plus one before every long ride, is enough to ride with confidence.
Motorcycle tyre pressure converter
Convert your tyre pressure between bar and psi in one click.
How do you read the converter's result?
The result shown is the same pressure expressed in the other unit, nothing more: 2.3 bar and 33.4 psi describe exactly the same inflation. The bar is the everyday unit in Europe, on manufacturers' manuals and most forecourt air pumps. The psi (pound per square inch) dominates in English-speaking countries: you will find it on imported gauges, some compressors and the spec sheets of American motorcycles.
The converter rounds psi to one decimal place and bar to two, which is more than enough in practice: no consumer gauge measures more finely than that. Compare the value you get with the one in your motorcycle's manual, then adjust the pressure valve by valve, with the bike cold.
What are the useful ballpark figures on a motorcycle?
The vast majority of road motorcycles are inflated to between 2.0 and 2.9 bar, or roughly 29 to 42 psi. The front tyre is usually inflated slightly less than the rear, and the manufacturer often gives two values: solo, and two-up or loaded. A few reference points to place a value at a glance:
| Bar | Psi | Common situation |
|---|---|---|
| 2.0 bar | 29.0 psi | Front of many lightweight motorcycles |
| 2.3 bar | 33.4 psi | Common front pressure for road use |
| 2.5 bar | 36.3 psi | Common rear pressure, solo |
| 2.9 bar | 42.1 psi | Rear, two-up or with a loaded bike |
If your conversion falls well outside that range, be suspicious: a pressure of 33 bar does not exist on a motorcycle, it was probably 33 psi. To go further, our guide explains how to monitor your motorcycle tyre pressure day to day.
What are the common conversion and inflation mistakes?
The most frequent mistake is measuring pressure when the tyres are hot. The manufacturer's values apply to cold tyres: after a few kilometres, the air heats up and the pressure climbs by something like 0.2 to 0.3 bar. A tyre checked on the way back from a ride therefore looks correctly inflated when it is in fact under-inflated.
Other classic traps: mixing up the two scales on a dual-scale gauge, forgetting to raise the rear pressure two-up or with luggage when the manual asks for it, or trusting your eyes, because a modern tyre can lose a good part of its pressure without looking flat. Outside temperature matters too: pressure drops by around 0.1 bar for every 10°C lost, which is why a monthly check is worth it. To fold it into your routine, take a look at our monthly maintenance tasks and our motorcycle maintenance calculator.
Frequently asked questions
How do you convert bar to psi in your head?
Multiply the value in bar by 14.5 to get psi. The other way round, divide psi by 14.5: 36 psi is about 2.5 bar. The converter above applies the exact factor (1 bar = 14.5038 psi), useful when a rough figure is not good enough.
What is the right pressure for my motorcycle tyres?
The one specified by your motorcycle's manufacturer, no more and no less. You will find it in the owner's manual or on a label stuck to the swingarm or under the seat, often with one value for solo riding and one for two-up or loaded. The pressures moulded into the tyre sidewall are maximum permissible figures, not recommendations.
Should pressure be measured cold or hot?
Cold, meaning with the bike parked for a few hours or after 2 to 3 kilometres at most. The pressures recommended by manufacturers are cold values: measured hot, the pressure is artificially raised by 0.2 to 0.3 bar, which skews the reading.
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