Melted front tires

[ohtobbad]

I realize I have an R, not sure if anyone else tracks their R.
about 4000 miles of street use. one full track day.
I figured tires were about 50%. Apparently I was wrong.
2nd track day, first session goes well.
Second session, feels good then it becomes a hand full.
Front sliding and pushing in every turn. I don't think I am over doing
and finally it happened, some one caught me and I had to give them
a point by :tsk: I chased for a lap, could barely keep up.
I brought car into pits to inspect, at first everything looked fine.
Then we found it, inside of both front tires are down to wire.
the very edge, still lots of grove on inside.
This normally means to much negative camber.
Funny how steel don't grip near as good as rubber LOL.

I don't change alignment for track days, but have never had front end alignment
done, so ordered tires and set up alignment time.
want to check it out, also trying to decide exactly where I want it to be.
I plan to do 3-4 for track days a year. So looking for sweet spot in set up
for both, decent wear and decent performance for the track.

Any suggestions from anyone?
I expect to get about 6-8000 miles per set.
Backs are still decent.

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[nastang87xx]

Toe will decimate the insides of tires way faster than camber will. Good call on the alignment. Don't draw conclusions too fast just yet.

 

[jasonstang]

Did you check your tire pressure and temperature coming off the track. High temperature caused by low pressure can rip tires apart.

 

[Hack]

I'm not sure if your experience is normal or not. Once you check the alignment you will know. I expect that is just the life of your tires. They are exceptionally soft and sticky and so they will wear out quickly.

You could purchase regular GT350 Pilot SS tires. Those will last significantly longer, but not stick as well. You could also buy a set of rims and run the SS on the street and save the SC2 tires for track days. Either way would extend your tire life.

 

[wildcatgoal]

I'll take your R if you're having tire issues with it...

 

[krt22]

You should really check your tires BEFORE a track day and make sure you will have ample tread to get through the day.

But 3-4 track days and 6-8k miles isnt happening on the SC2s unless you are really babying it. I agree with hack, get a spare set of rims with street tires and 1 set dedicated for the track.

 

[CSL]

The inner tread wearing on a stock alignment just doesn't sound right. Your tire wear should be pretty even across the tread, and uneven wear should be less on the outer tread with a stock alignment. Yes, getting the alignment checked will give you a lot more information, but the wear you describe does not sound right.

 

[Zitrosounds]

I realize I have an R, not sure if anyone else tracks their R.
about 4000 miles of street use. one full track day.
I figured tires were about 50%. Apparently I was wrong.
2nd track day, first session goes well.
Second session, feels good then it becomes a hand full.
Front sliding and pushing in every turn. I don't think I am over doing
and finally it happened, some one caught me and I had to give them
a point by :tsk: I chased for a lap, could barely keep up.
I brought car into pits to inspect, at first everything looked fine.
Then we found it, inside of both front tires are down to wire.
the very edge, still lots of grove on inside.
This normally means to much negative camber.
Funny how steel don't grip near as good as rubber LOL.

I don't change alignment for track days, but have never had front end alignment
done, so ordered tires and set up alignment time.
want to check it out, also trying to decide exactly where I want it to be.
I plan to do 3-4 for track days a year. So looking for sweet spot in set up
for both, decent wear and decent performance for the track.

Any suggestions from anyone?
I expect to get about 6-8000 miles per set.
Backs are still decent.

Are you using the FP track alignment recommendation? That will probably fix your issue.

 

[J_Maher_AMG]

Ouch TR, thats brutal man. I tend to drive spiritedly on backroads, certainly not like in a track setting, but I sure hope mine hold up for longer than that :eyebulge:

Looks like replacement Super Sports might be the better option for decent street durability in conjunction with decent overall grip.

Lucky you were able to keep it under control and prevent anything worse from happening man.

 

[ohtobbad]

Will answer all here.
First off it was 2nd track day 2nd session.
so in all was into 6th session, not 4track days which would equal 16 sessions.

Yes I checked, inner grove was still better than half, if you have seen sport cup two
you will know what I mean, I figured tires were 50 to 60% wore out before I got there.
This happened in less than 25 laps.

I set pressures before I start ( cold) and check between each sessions.
I also do a complete check of car before I take it to track.
Habit from racing days. Check it out after every session.

I do not re do alignment for track days, they recommend more negative camber,
which will give you better cornering, faster times, but will wear tires faster.

I will not go to cheaper wheels and tires, big part of reason why I bought it.
Plan is to check out alignment, ( which I did not do since buying)
Factory settings, not sure how on the money they were.

I agree, If it has to much camber or toe is off, it will wear out much quicker.


Also I trailer car to event, so no issues going home

Everything I have read, gave me impression of 9 to 12k miles
including a few track days. Maybe not

Guess I will have to increase my consumables budget.
I have ordered new front set few days ago.
today I got very good deal on complete set

 

[Variance]

Everything I have read, gave me impression of 9 to 12k miles
including a few track days. Maybe not

The weight of the car probably isn't helping; most of the other cars with Cup2s from the factory (that I can think of off the top of my head) are several hundred pounds lighter than the GT350, so the tires probably last a big longer. There's also a big V8 loading down the fronts, as compared to, say, a GT3.

Do you have a pyrometer or other way to check the tire temps? If you actually do have an alignment issue, the tires should show a fairly noticeable temperature gradient across the tread surface.

 

[ohtobbad]

The weight of the car probably isn't helping; most of the other cars with Cup2s from the factory (that I can think of off the top of my head) are several hundred pounds lighter than the GT350, so the tires probably last a big longer. There's also a big V8 loading down the fronts, as compared to, say, a GT3.

Do you have a pyrometer or other way to check the tire temps? If you actually do have an alignment issue, the tires should show a fairly noticeable temperature gradient across the tread surface.

no I don't, Not sure for amount of track time I do if I need on.
up to the point of this, they wore ok, but did wear fast.

I am more concerned about them going so quick at the end.

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