Tire Rack Consumer Reviews

Initial Review, 1,000 Miles on Tires
April 27, 2011

First point - I'm rating the R-11's against Michelin PS2's specifically. I use my car almost exclusively for High Performance Driver Education events with PCA and NASA. I've done 5 track days on them so far and my observations are:

They are VERY sensitive (much more than the PS2s) to tire pressures. Porsche's stock cold pressures are supposed to be 37/44 (F/R). But through experimentation, to get maximum traction, I've found that hot pressures should not exceed 35F and 39R. Depending on ambient and track temps, I would suggest STARTING at 30F and 33R, and working DOWN from there. On hot days, don't be surprised if you have to go down to a cold pressure of 26F and 30R or lower.



They ride a bit harsher than the PS2, but are no noisier, and both the grip and wear so far has been superior to the Michelins'. As a bonus, one of my track days was in the rain, and the R-11's traction was surprisingly good there too. I think this is a much better tire overall to the PS2, and nobody could have convinced me that ANY street tire was better than the PS2. One final bonus -- they're less expensive!