[JeffM2PRDallas]

Hello, I was wondering if anyone here had this issue with the michelin pilot sport cup 2 sidewall. It looks like is a cut but I haven't see anything in my fender that indicates that.

Thanks for all the help!

[DanG]

Looks like a sidewall cut from the installation of the cup2 to me.

[leopard print]

Originally Posted by DanG

Looks like a sidewall cut from the installation of the cup2 to me.

Would be my guess as well.

How long have you had the tires on the car? Do you think it's something that happened while they were on the car?

[CSBM5]

Agree with those above - it looks like installer damage (particularly with the wheel untouched, I doubt this occurred while the car was being driven).

[medphysdave]

Either install damage or driving too hard with low tire pressure and they bent into the wheel. It looks like there is a start and end point from a tool mark though so I'm leaning towards install.

[Track/S]

Cutting of assembly.

[///MPhatic]

M2Pilot What does this look like to you?

[M2Pilot]

Originally Posted by ///MPhatic

M2Pilot What does this look like to you?

Installation error damage from the mount head if you ask me.

[JeffM2PRDallas]

Originally Posted by M2Pilot

Installation error damage from the mount head if you ask me.

I think i found my answer.

https://cimg2.ibsrv.net/gimg/rennlis...0d6dcce924.jpg

[inTgr8r]

Originally Posted by JeffM2PRDallas

I think i found my answer.

https://cimg2.ibsrv.net/gimg/rennlis...0d6dcce924.jpg

what pressures were you running?
(hot & cold)

I ran 28 cold and might get to 34 hot.
any more than 34 hot and they would get greasy

[medphysdave]

These tires take a while to heat up and chew up the sidewalls quick below 31 cold if you start pushing them around corners. I witnessed this on Monday and could feel the tires rolling over. Only took a couple of laps to round the sides of the tread

[CSBM5]

Originally Posted by JeffM2PRDallas

I think i found my answer.

https://cimg2.ibsrv.net/gimg/rennlis...0d6dcce924.jpg

That is not usage induced damage. It's clearly mechanical damage created during tire installation. Dismounting the tire will show the details of what happened and should be done (analysis of damage) as the tires are replaced. It's a coin flip or worse odds to attempt to use this tire in its current condition.

[JeffM2PRDallas]

Originally Posted by CSBM5

That is not usage induced damage. It's clearly mechanical damage created during tire installation. Dismounting the tire will show the details of what happened and should be done (analysis of damage) as the tires are replaced. It's a coin flip or worse odds to attempt to use this tire in its current condition.

Yes, This happen during my first heat at the track.

[CSBM5]

Originally Posted by JeffM2PRDallas

Yes, This happen during my first heat at the track.

I'd wager it was there beforehand and/or just opened up after heat cycling. That isn't a fault with the sidewall -- mechanical damage was done to it by an outside object/force.