Just received a customers shaved and heat cycled Kuhmo V700s... nice.
03-26-2003, 07:27 AM
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Just received a customers shaved and heat cycled Kuhmo V700s... nice.
I was told that shaving tires to 4/32 and heat cycling will get more track events out of a tire, so I went ahead a got them done...
I received them yesterday... damn... they look awesome...
What experiences do you guys have with shaving and heat cycling tires... from life of the tire and performance... it costs around 30/tire to get this done. I'm thinking of doing this to my track set...
Joe
I received them yesterday... damn... they look awesome...
What experiences do you guys have with shaving and heat cycling tires... from life of the tire and performance... it costs around 30/tire to get this done. I'm thinking of doing this to my track set...
Joe
03-26-2003, 08:08 AM
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Shaving reduces tread squirm and eventual chunking
from the tread itself overheating. If you have ever chunked a new set of tires at a track event, you would view shaving differently.
03-26-2003, 08:14 AM
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I'm not a big believer in shaving Kumhos, but I've become a believer
in heat cycling (either yourself or by your shop).
For what most people do with Kumho's shaving them is overkill. Often people will shave tires to get to the "good" tread depth, but I don't think that performance suffers much with Kumhos when you start with full tread. You'll also (obviously) get more life out of your tire if you don't shave them. That is to say, you'll get some benefit in terms of absolute grip, but I don't think that in a tire like a Kumho, it's outweighed by the amount your shortening the life of the tire. Clearly if you need the tire to be perfect for tomorrow's race, go for it, but if you're just doing this for DE track time, you're throwing some $ away. IMHO.
Some tires do not take multiple heat cycles well (Hoosiers do not, for example). They sort of have a finite life in terms of absolute number of times you can bring them up to temp, even if they still have visible tread. For these tires, it's frequently worth shaving them (with the exception of Hoosiers, as they don't come with enough tread to shave).
On the Spec Miata we ran Toyos (spec tire) and always shaved them and always did a couple serious heat cycles before we raced or qualified on them. They were terrible to start with, but after those couple or so heat cycles, were great.
For what most people do with Kumho's shaving them is overkill. Often people will shave tires to get to the "good" tread depth, but I don't think that performance suffers much with Kumhos when you start with full tread. You'll also (obviously) get more life out of your tire if you don't shave them. That is to say, you'll get some benefit in terms of absolute grip, but I don't think that in a tire like a Kumho, it's outweighed by the amount your shortening the life of the tire. Clearly if you need the tire to be perfect for tomorrow's race, go for it, but if you're just doing this for DE track time, you're throwing some $ away. IMHO.
Some tires do not take multiple heat cycles well (Hoosiers do not, for example). They sort of have a finite life in terms of absolute number of times you can bring them up to temp, even if they still have visible tread. For these tires, it's frequently worth shaving them (with the exception of Hoosiers, as they don't come with enough tread to shave).
On the Spec Miata we ran Toyos (spec tire) and always shaved them and always did a couple serious heat cycles before we raced or qualified on them. They were terrible to start with, but after those couple or so heat cycles, were great.
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