I am purchasing Pirelli Cinturato P7 tyres. I have read that these tyres are asymmetric. What does this mean for fitting?

Question from Gee, 31/01/2011 :I am purchasing 4 new Pirelli Cinturato P7 tyres. I have read that these tyres are asymmetric and have wider blocks on the outside shoulder and smaller blocks on the inside shoulder. Does this mean that you have to make sure that you tyres for the offside wheels and different tyres for the nearside wheels to make sure they are fitted correctly with the wider blocks always on the outside of the tyre ?Thank you
Answer by jon, 31/01/2011 :

You are correct. Instead of directional arrows, asymmetric tyres mark the inside and the outside of the tyre. All you have to make sure is that the "outside" of the tyre is... well on the outside :)

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Answer by rezulteo, 31/01/2011 :

All asymmetric tires have specified on the sidewall the outside/inside position. A simple glance isn't enough to define the right fitting position.