Forse anche questo commento che ho trovato puo' interessarvi: "le misure di gomma ideali per NC" da "Skeeler":
Street: 17x7+55 to 17x8+45 with 205/45-17 to 215/45-17.
Track: 17x8+45 to 17x9+49 w/ 225/45-17 to 235/40-17.
Autrocross: 17x9+49 to +45 w/ 235/40-17 to 255/40-17.
Street: 17x7+55 to 17x8+45 with 205/45-17 to 215/45-17.
Track: 17x8+45 to 17x9+49 w/ 225/45-17 to 235/40-17.
Autrocross: 17x9+49 to +45 w/ 235/40-17 to 255/40-17.