Michelin pilot sport ps2, Nokian Z G2and Dunlop Direzza Sport Z1 Star Spec are all 255/40/17 sized tyres. When buying a tyre, a person wants a tyre with firm grip and all these tyres assure that .To start with Michelin pilot sport ps2, it provides its buyers with an excellent dry grip and a nominal wet grip of 88%. It is an extremely comfortable tyre and a lot of people buy it again .Nokian Z G2 provides its buyers with exceptional dry as well as wet grip. This tyre provides a very comfortable and smooth experience. From a survey conducted, it was found out that about 84 % people bought it again. The third tyre, Dunlop Direzza Sport Z1 Star Spec, is a distinguished tyre with an extremely impressive dry grip and a regular wet grip. It has progressiveness of about 88 % and about 95% people would love to buy this tyre again.