Nitto NT01 225/45ZR/15 87WThe NT01 offers varying degrees of competition performance. The tire is molded at 6. 3 32nds of an inch with large continuous tread blocks and sweeping lateral grooves. This set up can be easily shaved down to 3 32nds of an inch tread depth to function as a race slick with twin circumferential grooves. When you're at the track, you want a tire that handles predictably and consistently. Nitto's engineers identified a combination of construction and