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      02-09-2013, 01:03 AM   #1
FogCityM3
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Minimum street tire tread for track

Might be a completely dumb question, but couldn't find any similar opinions so far..but how much tread is acceptable to run on a track with PSS's... I currently have 4/32nds left, but was wondering whether that was enough to survive a track day driving school (beginner group no passing/aggressive driving). Thx in advance
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      02-09-2013, 02:01 AM   #2
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someone with more experience than me will speak up, but i would say that you definitely need more tread than 4/32nds. the measurement is generally towards the center of the tire, and during aggressive track driving, your tires are going to be punished more around the edges of the tires in the front and rears.
i'd venture to speculate that you'll be seeing belts around the inside edges of your tires if you spend a day at the track with that little tread left.
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      02-09-2013, 04:54 AM   #3
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4/32 even wear is plenty for a two day weekend event in the dry

Wet will be compromised a bit
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      02-09-2013, 07:43 AM   #4
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4/32 is plenty. Don't Hoosier S6 start at 4/32? You'll be fine.
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      02-09-2013, 07:48 AM   #5
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Quote:
Originally Posted by smmmurf
4/32 even wear is plenty for a two day weekend event in the dry

Wet will be compromised a bit
+1

Just tracked mine with less than that but it was dry out.

Time for some 295's soon
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      02-09-2013, 10:25 AM   #6
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Awesome...thx for the advice guys!

Quote:
Originally Posted by Mike Benvo View Post
+1

Just tracked mine with less than that but it was dry out.

Time for some 295's soon
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      02-09-2013, 11:43 AM   #7
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Depends on the track, too. Some tracks are hard on tires, others are kinder. If you run on these, be sure to examine your tire shoulders after each run. If you start to see cord, you're done. If you are in doubt, consult with your driving instructor. They're there to help!

Have fun!
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      02-09-2013, 06:19 PM   #8
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I went to the njmp track with 3/32... ran 3, 20 minute sessions with no issues !
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      02-10-2013, 10:15 AM   #9
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Quote:
Originally Posted by llis View Post
Depends on the track, too. Some tracks are hard on tires, others are kinder. If you run on these, be sure to examine your tire shoulders after each run. If you start to see cord, you're done. If you are in doubt, consult with your driving instructor. They're there to help!

Have fun!
This. Definitely keep an eye on your tire tread, in addition to your tire pressure and retorquing your wheels if possible between sessions. If you're in a novice session that doesn't even allow passing you'll probably be fine, but can't hurt to make sure. Enjoy!

P.S. Usually cars that go on track are required to pass a tech inspection beforehand, and that form should specify that organizer/track's requirements for things like remaining brake pad material and tire tread. Doesn't yours?
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      02-11-2013, 02:37 PM   #10
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Shallow tread is better in some ways for track. The shorter tread blocks will squirm less, so there will be less chance of getting nasty irregular wear.

As noted above, make sure to read the rules on what is required for tech inspection, and if you're running with shallow tread in the wet, watch out.

Also, as a general rule, follow the old adage of slow in/fast out. The most common way to murder street tires on the track is to go bombing into corners too fast and tear up the outside front tire.

Bonus is that the tires are nearing the end of their useful street life, so there's minimal loss if you do happen to cord them.
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      02-11-2013, 04:46 PM   #11
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Great advice! appreciate it

Quote:
Originally Posted by ben@tirerack View Post
Shallow tread is better in some ways for track. The shorter tread blocks will squirm less, so there will be less chance of getting nasty irregular wear.

As noted above, make sure to read the rules on what is required for tech inspection, and if you're running with shallow tread in the wet, watch out.

Also, as a general rule, follow the old adage of slow in/fast out. The most common way to murder street tires on the track is to go bombing into corners too fast and tear up the outside front tire.

Bonus is that the tires are nearing the end of their useful street life, so there's minimal loss if you do happen to cord them.
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