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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 04-18-2006, 08:21 AM   #1
MPossible
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Tire Tread question

I figure this should go in this forum since it has to do with track specs for tires.

I usually use my zhp rims for track events and run Michelin Pilot sports. My question is right now the rears are pretty much finished. I wouldn't want to go out with them that bald.
However, my fronts have a significant amount more tread than the rears but nothing near new. I have around 11k miles on the tires with two DEs also within that mileage.
Should I just get a full replacement set of tires? or jsut do the rears?
Will I have too much bias with having new rear tires and worn fronts?


Also, I plan on getting around 500-800 miles on before the event and was seeing if anyone has run with that low of mileage on new tires.

Much appreciated
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Old 04-18-2006, 11:11 AM   #3
jun14scr
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i assume you are running the same size all around? i would NOT rotate the front to the rear, and vice versa. this would adversely effect how your car handles. generally, whenever its time for a new pair, i'll buy a new set. soem reasons include tire age and the heat cycles they have experienced which break down a tire.

how low are they? as long as they are not bald, meaning, you can't tell which part was treadblock and which was void area, a tire wiill hold... until it runs across water. on a dry day, you should be fine. the car might step out a little more but that's easily controlled. contrary to belief, most tires get faster as they are worn down. a reason why victoracers, v700s, etc need to be shaved. even the faster street tire drivers shave their tires for less tire squirm and heat build up.

ps are expensive. maybe it's time you invest in a hankook or falken as a dedicated set of track tires. koseis are going very cheap these days also.
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Old 04-18-2006, 04:26 PM   #4
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Quote:
Originally Posted by jun14scr
koseis are going very cheap these days also.
But they're being discontinued.
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Old 04-18-2006, 05:36 PM   #5
MPossible
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^ They are staggered setup. The rears may hold up but since it is a two day event I would hate to get there and not be able to run the second day.

I took a penny to the tread and if you place the guys head down, the tread barely makes it to his hair Dont know if that helps lol but thats how low it is.
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Old 04-18-2006, 05:54 PM   #6
jun14scr
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hmmmmm. so you are on the wear bars?

just don't do any burnouts!!

it's really your own call. what size tires do you have? maybe its time for some better tires!
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Old 04-20-2006, 10:57 AM   #7
///Matt
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Tirerack recomends about 500 miles for breaking in tires so you should be OK if you buy new tires.

I did an event in my Mazda earlier this month with about 600 miles on four new Falken Azenis 615s. The tires were fine and grippy all day despite the cold weather.
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