Having owned PFL and FL cars with the stock Pirelli's, the Michelin's MPS4S in my experience is in a different league. They grip better in dry and wet conditions, provide better feedback through the steering and last twice as long. Yes they are ever so slightly noisier than the Pirelli's but the plus points far outweigh this minor issue. I did have some traction issues when the tyres were new, but after scrubbing them in (which took ages) and increasing the tyre pressures I found they settled down.
At first the wider 255's up front made the turn in feel so much sharper and the car would change direction much better, but as I put more miles on them I started to notice the car would 'wander' about at speed as if it was tram lining. I spent time and money checking alignment and suspension and ended up swapping the 255/30 fronts for a 235/35 squared set up. This has made the car so much better and ride quality has improved too. The size of the 255 MPS4S is much wider than the Pirelli and does not sit on the 8.5J front alloy properly - it stretches the tyre side wall inward into a slightly curved shape which does not allow the side wall of the tyre to work properly. I showed some pictures of the fitment to the Michelin Tech Director who was at this year's Goodwood FOS and he said the same thing about the side wall.
The narrower 235 tyre fits ok and the 35 profile gives a bit more protection from pot holes too. I admit that I am tempted to try the 245/35's all round but they are a fair bit more expensive than the 235 size.
The 255 Michelin looks so much wider than the same size Pirelli.......
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The difference in same tyre size between Michelin MPS4S and stock Pirelli PZero (right)
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The 245/35 MPS4S on the REVO RV019 alloys look just right.
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