Are my tires ok for another HPDE?

[lavmugen]

Here's my front right tire after my 3rd HPDE last October (the left one is similar but not as bad):



I have driven about 22000 km or 13750 miles on these and have about 6mm depth front and 5mm depth rear.

Am i okay for another HPDE? Will this pass tech?

[VMRWheels]

That will be fine for another track day but it doesn't seem like those tires can handle the heat produced by autox or tracking, because the compound is disintegrating.

-Charles@VMRWheels

[Mitch1er]

i had the same exact thing happen to my V12 after a track day, i had no problem afterward.

[lavmugen]

i will email the event coordinators to get an opinion. the trackday is in 1.5 weeks. just want to be safe. thanks guys.

[TrojanBMW]

Is that a Star Spec?

[larryn]

Originally Posted by TrojanBMW

Is that a Star Spec?

Definitely not a Star Spec. Tread pattern is much more blocky and aggressive on the Star Specs. I am prob wrong, but that looks like the General Exclaim UHP to me.

[lavmugen]

it's a Hankook V12 Evo.

Do you guys think it's okay for another HPDE? Or will I not pass tech?

[larryn]

Originally Posted by lavmugen

it's a Hankook V12 Evo.

Do you guys think it's okay for another HPDE? Or will I not pass tech?

I serve as the "final guy" on tech decisions at my events (event chair). I would pass you, no problem. As long as the tearing does not go into the surface of the tires, and remained on the treads, you should be fine.

[lavmugen]

Originally Posted by larryn

I serve as the "final guy" on tech decisions at my events (event chair). I would pass you, no problem. As long as the tearing does not go into the surface of the tires, and remained on the treads, you should be fine.

thanks larryn for your input. i have also emailed that picture to the event guys for an opinion.

both my front tires has wear on the outside half of the tire from the lack of camber. am i helping/doing the right thing by bumping up the tire pressure?

last event i ran 42 psi cold and got up to 48 psi hot. would lower tire pressure ease the wear and hopefully avoid chunking?

i do have a set of brand new Potenza RE-01R sitting in garage but i am hoping not to use them until these wear out

[LA-Bimmer]

If you are talking about 20-30 minute sessions at HPDEs vs. short autocross runs, the tire pressure is way too high and the heat you are generating is likely causing the chunking. I would try and target closer to 39-41psi hot. You are going to get a little more roll onto the upper part of the sidewall, but that is primarily a camber issue.

[Dackelone]

Why not take your tires to a local shop that can "shave them" down for racing. I bet TireRack's website could point you in the right direction. That is what I would do.

You have some serious "heat chunking" going on there.

[Lubo]

Originally Posted by Dackelone

Why not take your tires to a local shop that can "shave them" down for racing. I bet TireRack's website could point you in the right direction. That is what I would do.

You have some serious "heat chunking" going on there.

Doesn't appear that there is much thread left on that tire. And I am not too sure that this type of tire would gain the same benefit as an R comp tire would from shaving. Added cost of shaving this type of tire might be spend elsewhere on some other more beneficial things.

[lavmugen]

Originally Posted by LA-Bimmer

If you are talking about 20-30 minute sessions at HPDEs vs. short autocross runs, the tire pressure is way too high and the heat you are generating is likely causing the chunking. I would try and target closer to 39-41psi hot. You are going to get a little more roll onto the upper part of the sidewall, but that is primarily a camber issue.

Thanks for the input. I will try to shoot for 40 psi hot next Monday. I will probably buy a $20 portable inflator in case.

The reason why I went for 42 psi cold is the amount of roll and wear i get on the sidewalls of the tire. I don't feel confidence in cornering on the sidewalls of my tires.

Camber plate is $500, install is $270 and alignment after is $110. A little steep for me considering I still need to pay $661 more in income taxes.

[lavmugen]

Originally Posted by Lubo

Doesn't appear that there is much thread left on that tire. And I am not too sure that this type of tire would gain the same benefit as an R comp tire would from shaving. Added cost of shaving this type of tire might be spend elsewhere on some other more beneficial things.

The tread should be okay as it measured 6mm depth (no idea what that is in inches). But i am more concerned that it would be deemed unsafe to go on the track at the morning tech. I do have another set of brand new RE-01R but would prefer to get more out of the current set if I could.

[and 1]

yeah you'll be fine. just pay a little extra attention to how they look AND feel. could be easier for more chunks to come off now that the process has started