Brakes Wheels 1st Gen Tires Most liked posts in thread: How far is too far?

Aren't shaved tires at about 3-4/32's?

 

Oh heck let them go out in a blaze of track day glory...

 

Oh heck, it will just make it interesting :devil:

 

Did you do the Star Specs again?
I love mine.

 

Au contraire, 3/32" on the track is perfect!

Well, 2/32 would be better, but that's splitting hairs. When the tread blocks are new and tall, they flex as you corner. The flexing creates friction within the rubber and extra heat builds up unevenly in the tread blocks, which leads them to chunk off. When the tread blocks are short, they don't flex as much, because the tire profile is more uniform. The tire distributes heat better and you have more grip.

That's why sticky street tires, like the Star Specs, have large tread blocks. It gives the tire more grip and resistance to heat. On the street, your primary concern is channeling water out from under the tire when it rains, hence most tires have lots of grooves. But on the track, heat within the tire is the more immediate concern.

 

They are heat cycled Jerry. I wouldn't risk thrashing one hard enough to cord & lose pressure while at speed on track.

However, if you have DD tires to swap to thrashing them at an AutoX might not be too bad.

Do you DD on those StarSpecs?

 

20K miles on Star Specs is pretty damn good!

 

Woah! I run mine at 30 and may try 28 next spring once they go back on.

 

You should do a Speedventures AutoX. Tons of runs (20-30+) and no cone shagging.

At a 215/45/17 tire you SHOULD be running them around 38 psi. The only time I drop them below that is on a track day you want them to be about 38 psi HOT so drop them to 30-32 cold.

My StarSpecs lasted 5 tracks days, some AutoX, and 15k of DD. Regular rotation and keeping an eye on pressures does it every time.

 

The car just seems to skip around too much at the higher psi.

 

Hmmmmm, don't know but I'll find out in the future

 

Mine is fine and I'm on stock suspension. R56 too.

 

Another believer in high pressures on the street here, too. 38 psi all around.