Porsche Boxster tyre pressures
Front 29 psi (2 bar), rear 35 psi (2.4 bar) on the standard 16-inch wheels, and the figures for the other wheel size it was sold with. Manufacturer data, checked cold.
| Wheels | Tyre size | Front | Rear |
|---|---|---|---|
| 16"standard | 205/55R16 / 225/50R16 | 29 psi · 2 bar | 35 psi · 2.4 bar |
| 18" | 225/40R18 / 265/35R18 | 29 psi · 2 bar | 36 psi · 2.5 bar |
Manufacturer figures for the Porsche Boxster, normal load, tyres cold. If the label on your door pillar or fuel flap says something different, go with that.
Got a different Boxster? Check by registration
Put your reg in and we'll show the figures for your exact car, including the wheel size it left the factory on.
What tyre pressure should a Boxster have?
29 psi at the front and 35 psi at the rear (2 and 2.4 bar) on the standard 16-inch wheels, with the tyres cold. Larger optional wheels use slightly different figures — see the table above.
Should I use a higher pressure when the car is loaded?
The manufacturer gives one figure for this car, so no. If you're carrying a full load for a long motorway run, the label on the door pillar may show a higher figure — follow that if it does.
What tyre size does the Boxster use?
205/55R16, 225/50R16, 225/40R18 or 265/35R18, depending on the wheels it was ordered with. The size is on the tyre's sidewall, e.g. 235/40R18.
Check them cold. Pressures are set for tyres that haven't been driven more than a mile or two. After a run they read 3–4 psi high.
Once a month, and before a long trip. Tyres lose about 1 psi a month on their own.
The sticker wins. If your car's door-pillar or fuel-flap label says something different, go with that — it knows your exact spec.