pretty easy size 225/45/17

because they are cheap, and I want to try the RS-R... the 180 treadwear RS version did not keep up with the hottest street tires, however the 140 RS-R also has reinforced sidewalls and the softer compound... I need to test it to see if it's the new RE01R (which I ran all last year) except RE01R is just a bit pricey for how much track driving I do.

I have a 25% rebate on a set of Dunlop direzza Z1's From the Rack if I need to use it I will pick up them, since they are also on my "must test" list.

I don't know how often you race, but the RE01R while a great tire and very tolerant of temperature. offers little to no feedback compared to a lot of other tires.