I still do on the back. To my surprise the fronts which are still 195s are about dropping off now at 18,000 miles so will need to replace and rotate soon do will be all round. I went for t1rs as my driving doesn't really require track rubber and I've always been impressed with their progressive loss of grip and wet performance whilst being a much easier price to swallow. I run them quite hard as thats to my taste. So won't comment on tyre pressures. Try oem pressures and then go from there till you get comfortable with how they perform and ride