The only difference in your example is the sidewall profile will be 5% lower than the 40s, so possibly a little harsher ride that may or may not be able to be detected. The front/rear rolling ratio is still maintained since both changed equally, so there shouldn't be any issues there. The speedo will be off just a bit thoughWhy would someone put 235 35 19 and 265 35 19 tires on a CS instead of 235 40 19 and 265 40 19 ? Any advantages or disadvantages?
The 35 series tires I have (Firestone Indy 500) give a ride that is noticeably harsher than the 40 series tires I have (Michelin PS4S).Ok guys I don't track the car so max performance is not needed, I would like a better ride if possible. I can live with the current 235 35 19 and 265 35 19 setup if I have to. Just trying to get the best option.
The tire size was increased to a larger diameter on the 981 (265 40 19) from the 265 35 19 used on the 987. This was described in the 2013 Technik 981 introduction book as “new generation of tires with larger rolling circumference (+4%) and enhanced rolling comfort”.What? My 987.2 came from the factory with 35's on 19" rims.