Over-inflated car tyres?

AlexMac

I always over-inflate my BMW 3 series' tyres by about the margin you describe.

And while I don't drive to the car's limit on corners (in fact I drive like an old f4r7) it always feels right, with no propensity to skid, albeit a bit harsh on bumpy roads. And I get fantastic mileage from both fuel (30+ in town, 42-46 mpg on a long run at 70mph; and that's a petrol 2l. engine, not diesel) and from tyres (40,000+ miles on standard 16" rims).

I did once start a journey with only maker's recommended pressures with 2 people on board, but after picking up 2 chums with their luggage, found the handling was very wallowy and unsafe-feeling; till I beefed up the pressure...

And I always assumed that it was a mantra that you uppd the PSI on long trips; or was that an urban (or rural) myth?

jeradon

Maybe the installer is inflating the tires to the maximum pressure shown on the sidewall. I experienced the same thing last time. The guy overinflated my Uniroyal tires. Good thing, I checked them before I leave the shop.

Smellyonion

Car garages do not care at all. they are not going to research the pressure your car needs and 99% of people wont check.

Time saving exercise.