Sifus,
How do you know if your Michelin 185/60R14 82H is xm1 or xm2?

I changed mine in Apr2013 , clocked 43k km mileage to-date with these tyres.
Today myvi service centre say my tyre quite old already and should consider changing all 4 in next service.

Can i know normally what is the average mileage and years of duration that these tyres can last? I only use for town-driving to work.

Last time got shushu teach me look at the small bump in the middle of the tyres and i see mine still there and quite big wor