alexb76

I got a question... when tires have excessive rubber buildup after tracking, does it mean they have over-heated and are ruined? or just have to rub it off by driving, or shaving?

More specifically, if PS2's have em, is that a bad sign? Here's a cpl of pic of em.











I've always had some build-up after tracking that went away quickly after a couple of hundred miles... but never this bad!

mdrums

They are fine...this is normal. Just drive the car and after a while they will look normal again.

alexb76

So, these are not excessive?

Nugget

Looks normal to me

jkramer

much of what you are seeing is rubber that's being picked up of the track, not necessarily from your tires. I race motorcycles and you should see what my race slicks look like after an hour of racing

alexb76

I guess they picked up more as they're wider than my older tires!

cviles

Very normal for a tire driven on the track. That's not rubber from your car, it's bits your hot sticky tires have picked up off the track that were left on the racing line by other cars and "marbles" from the track edges.

As other have said, very normal and will go away with a little bit of street driving.

cab&coupe

Congrats... you were driving the car hard enough to heat up your tires.

number9ine

like others have said, those are track marbles picked up by your hot tires. No big deal that your tires got that hot, but that's a lot of rubber to be picking up unless you were driving an AX or short course with tight radii. Were you driving outside the line often? Did you have any off-track excursions into unused pavement?

Your tires are unhurt and the marbles will fall off with a highway drive, but I'd be concerned that you drove on a part of the track where marbles accumulate and things get slippery, fast. An example I can think of is WGI turn 10, where folks sometimes take the turn on the far outside to pit in and pick up all that loose rubber and gravel. Some have gone straight off the track doing this, or lost control and slid back inside on a hot track. Just a caveat for your next event. Hope you had fun!

TigerStadt

As others have said just some "marbles" picked up on hot tires. Also, looks like your tire pressure might be a couple pounds high based on wear pattern. Not utilizing full tread width.

alexb76

Why do you say that? Anything specific on the wear?

cviles

There are lots of places to pick up marbles. I've come in with my PSCs covered like that without ever getting off the racing line, except to pass. Sometimes you pick up marbles in the paddock or the pits, as well as along the line to merge onto the track exiting the pits.

I'd also like a clarification on TigerStadt's comment about tire pressure & wear. I see a little bit of shoulder wear, but that's normal for the PS2 when it does track duty. A "feature" of this tire is a shoulder that's designed to roll over a bit under hard cornering to increase the size of the contact patch. Except at the track, you're always cornering hard...

brendo

i think what he's referring to is the difference in the wear on the outside shoulder. the top line (pictured) indicates overinflation - and the bottom line indicates that there was more tread contact with the surface.

as the day progresses in an event, typically you'll see tire temps go up, and if you don't lower the pressure, you're effectively running on less tire, in case case, probably an inch

TigerStadt

Yes, this is what I was referring to. Sorry I wasn't more specific. Also, it looks like the OP's first pic is a front and the second is a rear. The front appears to have been optimally inflated and the rear slightly over inflated. Higher pressure keeps the outside edges from contacting/wearing. Lower pressure makes the tire roll over and wear more on the edges. The difference can be as little as only 1-2 lbs. of pressure. You can influence understeer and oversteer characteristics with tire pressure alone.

alexb76

No, all pics of rear tires only.

Thanks for the info helps a lot.