hi.
I recently changed my 17" alloys for 18" with 225/45 tyres .
the recommended pressures for these are 34psi front and rear for light load.
however, the cars recommended pressures are set at 38 rear =and 41 front, which leads to the warning light coming on on most journeys
can the recommended pressures be reset without a trip to a dealer, or even at all?
chris