hello all just joined the forum as i have been informed you guys know everything on here lol

well i've got the b7 2.0tdi with an annoying problem basically at 70mph and continuing from there up to 80mph i get an intermittent vibration through the gas pedal and the seats but not the steering wheel

the does have all th wrong size tyres on, 225/40 on front and 245/40 RUNFLATS on the back,god knows why there is run flats on it, but found out theres a nail in one so its obviously been running on flat for sometime

could this be causing the vibration>? i really dont know. any help would be very much appreciated

Many Thanks

Matt