I am getting near the time of changing my tyres on my car, a rover coupe vvc, the standered size for these tyres are 185,55,R15. but these are really expensive (Eagle f1's are around £89!) but someone told me it was ok to put 195,50,R15 on my car, i checked prices and a Eagle F1 GSD3 is only £50, huge difference, but is this safe? thanks for any advice