I have a 1.2 52reg Extreme clio with standard alloys fitted. I have been reading that the tyre size should be 185/55/r15 But the tyres i have had fitted for the past 7 months from national tyres are 195/55/r15 not sure if it makes any difference? Anyone back on track due to the tyres not being the same as i've been reading online. So is there a problem with these tyre sizes? An how much pressure should i pump into them!