I just finished my 5th track weekend on my set of Michelin Pilot Super Sport Tires.

Most of my track days on this set of tires have been counter clockwise so a lot of left turns.

I was checking tread depth and found the treads in the middle are still easily above the tread wear marker. I measured and they are about 7/32nds.

However, the very outside of the tires (mainly the front right tire) has almost no tread left.

Here is a picture of my front right tire. I noticed on the outside it is starting to peel and looks like it's getting to ZERO tread and about to show cording. It just sucks to replace them since the rest of the tire still has enough tread depth.

My front right tire is the worst, the rest aren't this bad but are close. Should I replace the whole set? If so, would GT3 control arms / more camber in the front help the tire wear more evenly instead of all on the outside?

 

Are you sure that your alignment is right?

 

It looks like you blistered the outside edge. Do you know what your alignment is set to? A set of factory GT3 or RSS arms would help with more negative camber which appears to be what you are lacking.

Also, low tire pressures would let the tire roll onto it's edge.

 

agree...GT3 LCA would help.

 

Did you rotate the tires at all? That would have spread the wear out to the other front tire. Is the other front tire wearing on the inside too much?

 

What is the most negative camber for the stock LCAs??

 

I had an alignemnt done recently. I believe they put the negative camber on my front tires as far negative as stock setup allows. I think it was around -1.5.

On track days, I run all 4 tires with around 33 psi pressure (COLD). It gets up to about 39 psi on the track.

What pressures should I be running with?

Are these still safe to run with the outside blistered?

 

I had a very similar experience with MPSS. Tracked with them blistered like that for a couple events and they were fine. Just keep a close eye on them for cording -- I don't see how it's a safety issue before that point. Mine eventually corded on both left side tires and needed to be replaced at that point. The center tread still had a long way to go, so yeah, it's frustrating.

In response I added LCA's for more negative camber (maxed out at -1.4 in front in the stock config) and sway bars. I also plan to rotate the tires this time. Finally, I will adjust my driving style and suggest you do too.

 

Lee,

How you doing this?

I know...

from slow in fast out...

to fast in...wicked fast out!

see you friday.

 

If staying stock, I would at least rotate the fronts.

 

I know these types of high performance tires are marked "inside/ outside" for the shoulders so they are mounted on the wheel correctly. If a tire has a directional tread I can understand that.

But if these tires can be rotated from right front to left front, etc that means the tires are not really directional.

If that is the case, in situations like this where just the outside of the tire is really wearing, why can't you dismount the tire from the wheel flip it and remount it? By doing that you would put the worn outer shoulder on the inside and move fresh tread out to the high wear area?

 

I thought the MPSS was created with different areas of the contact patch designed for different purposes, hence the "inside" and "outside" markings. Like the previous Pilots, I was just assuming they are not directional. Anyone with more knowledge of the MPSS????

 

From Michelin: "The Pilot Super Sport features an asymmetric design molded of Michelin’s Bi-Compound tread rubber featuring a Le Mans-inspired dry compound outboard side-by-side with their latest generation of wet compound inboard. The low-void outboard shoulder features a track-type compound to withstand the stresses of high performance cornering while the notched center ribs and inboard shoulder feature a compound designed for superior performance at very high speeds and in wet conditions."

So, different inboard and outboards means obey the outside markings! Best move for OP I believe is to swap the lefts and rights. They are not directional.

 

Since these tires are supposedly and upgrade to the MPPS2's, and more track worthy, anythought to seeing what Michelein would do? Or does the obvious track wear mean SOL. You could also just buy one front tire, rotate the rears (because of the track you run wears down the same side), and maybe the new one will catch up to the other front one in due time.

 

Yea, I think I am just going to buy a new set before my next track session. It's just annoying because there is plenty of tread left in the middle of the tire... only the outside has been rubbed down to it's limit.

I am going to replace all 4 and have an alignment done with as much negative camber as possible.