Since the release of the Subaru BRZ and its twin the Scion FR-S, we have been able to get both vehicles to Tire Rack's headquarters for measurements. First indication is that these very capable cars have been very "under tired" from the factory. Despite its excellent poise and impressive skidpad numbers, the BR-Z and FR-S are shod with a narrow 215/45-17 all-season tire from the factory. Such a fitment, although good for fuel efficiency and tread life, severely inhibits the cars' true performance. The wheels also seem a bit too narrow and use a very conservative high offset which makes them appear sunken into the fenders.
Based upon our measurements, these two cars are capable of running a 245 width tire on all four corners -- utilizing anywhere between a 17"-19" wheel. If you're wanting to run a staggered set-up, the rear fender arches can accommodate a width up to 265mm with the correct wheel.
Autocross and track driving participants will likely wish to use a square set-up to maintain the car's balance. The hot set-up for these, in my opinion, would be a 17x8 wheel using a 245/40-17 tire at all four corners. This tire size allows for many popular street tires to be installed including the Yokohama ADVAN Neova AD08, Bridgestone Potenza RE-11, Kumho Ecsta XS, Dunlop Direzza Sport Z1 Star Spec and Hankook Ventus R-S3. Are you looking to utilize a purely competition tire? You may find interest in the Hankook Ventus Z214, BFGoodrich g-Force R1, Hoosier A6 or Hoosier R6
With many tire choices available, as well as a large inventory of wheels from manufacturers like Enkei Racing Series, O.Z. Racing and Sparco, the best way to start looking for your desired set-up is to view our Tire & Wheel Packages.