Michelin tire issue
 

I bought Porsche rated 335/30/20s for the rear of my 57. When im just easing down the road. I hear constant pinging underneath the car, the wheels end up with little rock pebbles in them. I pulled the tires off and noticed that the underneath has been sandblasted from just 80 miles of driving. These are 200 tread wear tires the same that are on my Camaro which doesn't have this issue. What do you guys think the issue is? I have read the reviews on Tire Rack and I don't see any issues from the Porsche guys. These were on sale at Tire rack.

Michelins are just nice and soft. Nothing wrong with the tire. Im guessing you have the ps2? The super sports have a higher treadwear

Porsche has the N compound. Not sure how much stickier it is but competitors seem to like them.

Better paint and a few coats of rubberized under coating might work for you.

Michelin's built to spec for various manufacturers can vary the compound quite a bit, treadwear rating is not indicative of how sticky these tires are....knowing which ones gives you an advantage, you obviously found one and expect the tire to wear pretty quickly if used for track...all I can say is my 300TW PSS is stickier than some 200TW's tires out there....

Don't get me wrong I like that the tires are sticky but not at the cost of damaging the underside of the car after 80 miles. My truck has Hossier quick times that are way stickier than these and it hasn't blasted the underside of it. I'm going to call Tire Rack and see what they think. Even the exhaust pipe is blasted. lol

:y0!: Modern-days cars (Porsches) have plastic fender liners so not an issue... Real steel on a chebby is a different application.
Jim.

I haven't got a clue about the issue you're having, but damn that's a good looking 57!

:thumbsup:

All I see is normal wear and tear from driving. When the Tire rack puts you on hold its so don't hear the laughter. : )

Seriously get some undercoating under there!!

I have the same issue with the new Rival S 335/30R18s I just put on my 69 Camaro. I did not have this issue with the Michelin PS2s or the KDWs I have used.

I too am concerned about damage to the car paint surfaces behind the wheels.

That's 80 miles worth you are looking at. Same paint and tires (except Porsche rated) as on my 69. It has 5700 miles and still looks new.

Michelin is having me drive the car to NTB and have them inspect it. We'll see where it goes from there. Love everything about the tires other than that.