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Old 07-20-2008, 03:51 PM   #1
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Default Can someone explain tire truing.

I got a 1/8 mrx and was wondering what are all the benefits of tire truing?Does everybody that race true there tires?How much do you take off?Thanks
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Old 07-20-2008, 04:13 PM   #2
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You need to get the right tire size.

The right tire size depends on the track, the car and the length of the race.

Because of 301's length I have been starting out pretty big on the tires. Usually around 68mm front 75 rear. For a big race or if you have an unlimited supply of motors you could go smaller.

For a slick track, run less split to get more overdrive. Short slick parking lot tracks I have run 65/69. Really hooks up off the corner good that way but you would not want to run that small a split at 301.

P.S. Split is the difference between front and rear tire diameter.
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Old 07-20-2008, 08:25 PM   #3
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believe it or not, ur tires last longer trued down to racing trim than stock.

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Old 07-20-2008, 10:57 PM   #4
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You need to cone the rears or the car will not turn properly. The cone shape acts as a diff in the turns. Don't run un-cambered rear tires go about 2 degrees and they will wear to 3 degrees.
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Old 07-21-2008, 10:16 AM   #5
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Does anyone cone their rears on their 1/10 scale? Or do you only do it for 8th scale? I never do that with my 1/10 scale.
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Old 07-21-2008, 08:14 PM   #6
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Originally Posted by zzbaba_2008 View Post
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Old 07-21-2008, 08:29 PM   #7
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Another spammer, ignore him.
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Old 07-21-2008, 08:54 PM   #8
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Quote:
Originally Posted by wingracer View Post
You need to get the right tire size.

The right tire size depends on the track, the car and the length of the race.

Because of 301's length I have been starting out pretty big on the tires. Usually around 68mm front 75 rear. For a big race or if you have an unlimited supply of motors you could go smaller.

For a slick track, run less split to get more overdrive. Short slick parking lot tracks I have run 65/69. Really hooks up off the corner good that way but you would not want to run that small a split at 301.

P.S. Split is the difference between front and rear tire diameter.

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Old 07-21-2008, 08:55 PM   #9
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I have trued Vince Jackson's tires for him once, and he told me to true them at 72mm for qualifying and he ran them all 3 quals at 301. Not saying Sean (Wingracer) is wrong because he knows a lot, but it is probably driver preference.

Last edited by Sandra; 07-22-2008 at 07:29 AM.
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Old 07-22-2008, 07:01 AM   #10
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Originally Posted by Sandra View Post
I have trued Vince Jackson's tires for him once, and he told me to true them at 72mm for qualifying and he ran them all 3 quals at 301. Not saying Sean (Wingracer) is wrong because he knows a whole lot but it is probably driver preference.
I assume you mean 72mm rears. Certainly nothing wrong with that. That is about where I end up at for qualifying after practice and a quick re-true to even them back out. I'm on a budget and don't have an endless supply of motors, so I go a little bigger. Come nats time I will probably be even smaller.

Now Toledo, there is a 68mm rear track, hahahahaha.
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Old 07-22-2008, 10:07 AM   #11
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Hi to everyone;
How do you measure your rear tires, when they are cut with 2 degree camber? I normally measure them on inside, but one of my friend say outside measurement is ok, because when measured from the outside, you can use the scale on the hudy tire truer.
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Old 07-24-2008, 10:59 AM   #12
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Quote:
Originally Posted by TheeMikeCee View Post
Does anyone cone their rears on their 1/10 scale? Or do you only do it for 8th scale? I never do that with my 1/10 scale.
I have my tire truer set with 1 degree of camber but there are times where I have trued tires for my 1/10 gas car with as much as 2 degrees of camber. Just depends on how much traction the track has or doesn't have and how much tire wear you are getting on any one of the 4 tires based on track conditions. The length of qualifiers and mains will also factor into the equation.

G4RS
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Old 07-24-2008, 04:32 PM   #13
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Quote:
Originally Posted by Speyederjedi View Post
I have my tire truer set with 1 degree of camber but there are times where I have trued tires for my 1/10 gas car with as much as 2 degrees of camber. Just depends on how much traction the track has or doesn't have and how much tire wear you are getting on any one of the 4 tires based on track conditions. The length of qualifiers and mains will also factor into the equation.

G4RS
Thanks. I think I might try this on the rears.
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