I needed new rears last month, mine naturally after six months driving every day were down to the markers. I’ve always used N rated Michelin PS2s but they’re substantially more expensive now that 18 months ago, so I looked around for alternatives. I’m very keen that my tyres are the best available for the car as flying off backwards into a hedge while thinking I should have bought better isn’t what anyone wants. I found PS4s were significantly cheaper but not N rated so I rang my insurance broker to ask what thei position might be. He said nobody had ever asked that before and since I had, I’d better speak to Porsche GB. I rang Reading and asked if N rated tyres were important and would non N rated be a problem, they said they didn’t know and put me through to my local dealer. Jack in the parts department was pretty sure it wasn’t a problem but said he would ask a department at Reading that was “non customer facing”. He confirmed with an email that as far as Porsche GB was concerned, N rated tyres were always fitted to new cars and preferred under warranty but after that it wasn’t a problem, I might find a small difference in road noise and behaviour but nothing detrimental.
I always believed that the N rating was a matter of construction due to the high loads of a rear engined fast car but it appears not. My insurance company is happy and the car is actually a bit nicer on the road.
They’re 17s, high load 98Y by the way.
i hope this helps anyone who has the same dilemma.
