Tire Size

[Car-nutt]

Hello everyone, looking to replace the tires (front & back) on my 91 ZR1. I am looking at Michelin Pilot Sport. I was thinking of 275/40/17 instead of the 285/40/17 and leaving the rear 315/35/17. As I understand Michelin are not producing the 285/40/17. Is there anything wrong with this size (275/40/17)? Has anyone else tried this combination before or run into this problem.

[Mikey]

275 and 315 are the stock sizes. No issues.
Michelin only makes the AS4 in these sizes. Great tire for everyday street but wouldn?t use them for extensive spirited driving and definitely not for track.

PS2 are available in 335 width. Often on back order though. Search multiple sources.

[Starman]

I have the PS2s on my 91, very happy with them and the slightly larger rears look better on the car. Got them from Costco.


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[WARP TEN]

I have the PS2s on my 91, very happy with them and the slightly larger rears look better on the car. Got them from Costco.


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That's what I did back in 2015. Michelin at the time only made 335-17 rears but they fit fine; they did have the stock front size. Costco had a good price and great service. And as to all season Michelins, suffice it to say that on my 2016 Z06 I replaced my summer only OEM Michelin Pilot Sports with Michelin A/S3+ZP runflats (the predecessor to the A/S4s). Did it in 2020 at about 20,000 miles and I now have 30,000 on the car. The tires have been great and are fine for street driving as well as spirited touring laps. But not for fll out racing. --Bob