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Old 09-16-2010, 05:39 PM   #1
timbits
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Default Snow tires for winter rally

I once heard something about modifying tires for winter rally. Something about Yokohama IG20's, and cutting more voids in the tread somehow?

Anybody know anything about that?
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Old 09-16-2010, 06:34 PM   #2
onur
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Default

you can do this, but you don't really want to for street use. we usually cut them once they are "tractionized" (special treatment to give the tires more grip, you can look it up).

IG20s are great tires for winter if you live where I live or even more North.

I don't think you need to cut them, they are pretty good as is unless you tractionized them.

If we are talking about deep snow performance rally than you might want to look into A034 tires, IG20s are mostly used when it's very icy conditions with not enough snow on the top.

cheers,

ot
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Old 09-16-2010, 06:51 PM   #3
timbits
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I was just wondering what the process was... Looks like there's a machine that punches a bunch of small holes in the rubber turning your tires spongy in the process?
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Old 09-16-2010, 08:47 PM   #4
tora
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Quote:
Originally Posted by timbits View Post
I was just wondering what the process was... Looks like there's a machine that punches a bunch of small holes in the rubber turning your tires spongy in the process?
It's more like this -
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Old 09-16-2010, 09:30 PM   #5
puff
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no its called siping thats a grove gun you want to sipe the tire and yes it does give you more traction the grove gun is for semi tires or forklift tires
http://www.off-road-outdoors.com/tire-siping.html
its the red machine at the bottem of the page
call kal tire seem if the shop on boundary has a machine
DONT GROVE YOUR TIRES THEY WILL LOOK LIKE CRAP

Last edited by puff; 09-16-2010 at 09:36 PM.
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Old 09-16-2010, 09:40 PM   #6
Zefy
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Quote:
Originally Posted by puff View Post
no its called siping thats a grove gun you want to sipe the tire and yes it does give you more traction the grove gun is for semi tires or forklift tires
http://www.off-road-outdoors.com/tire-siping.html
its the red machine at the bottem of the page
call some tire shops
DONT GROVE YOUR TIRES THEY WILL LOOK LIKE CRAP
you obviously have never been to a rally.

a tire groover is used extensively on rally tires. i believe timbits was asking about both tractionizing and grooving.

tractionizing is like siping on steroids. it basically ruins the tire (unlike the 4x4 style that you're refering to) but makes it extremely grippy on the right stuff.





and here is a gent grooving a racing tire. VERY common in rally.




my limited experience with snow tires tells me that the general altimax is NOT a good choice. great in the deep stuff and alright on the slippy bits (no studs) but they have a weak sidewall. i've destroyed two so far...

moved to the kumho kw19 with studs. Apparently this is the tire of choice among the poor rally folks. Apparently the ig20 is better but it really comes down to personal preference and what the conditions are like. Keeping in mind the ig20 is studless. studless is a requirement for national rally. Regional rally allows studs so this will also be a deciding factor ton consider...

Last edited by Zefy; 09-16-2010 at 09:46 PM.
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Old 09-16-2010, 10:48 PM   #7
tora
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My bad
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Old 09-17-2010, 12:28 AM   #8
puff
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Quote:
Originally Posted by Zefy View Post
you obviously have never been to a rally.

a tire groover is used extensively on rally tires. i believe timbits was asking about both tractionizing and grooving.

tractionizing is like siping on steroids. it basically ruins the tire (unlike the 4x4 style that you're refering to) but makes it extremely grippy on the right stuff.





and here is a gent grooving a racing tire. VERY common in rally.




my limited experience with snow tires tells me that the general altimax is NOT a good choice. great in the deep stuff and alright on the slippy bits (no studs) but they have a weak sidewall. i've destroyed two so far...

moved to the kumho kw19 with studs. Apparently this is the tire of choice among the poor rally folks. Apparently the ig20 is better but it really comes down to personal preference and what the conditions are like. Keeping in mind the ig20 is studless. studless is a requirement for national rally. Regional rally allows studs so this will also be a deciding factor ton consider...
no i havent but i am a industrial tire service man and when he said cutting i thought he ment siping
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Old 09-18-2010, 01:00 AM   #9
jameseshepherd
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I have KW19's too
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