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      03-01-2009, 11:42 AM   #1
martinsmu
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Tire weight and performance

Can the weight of the tires ONLY (OEM rims) make a difference in a roll performance? I am looking at tires, the 245/35 weigh 22LBS where the 255/35 come in at 24LBS.

From a roll, will the extra weight be a a factor at all? This is just me being curious and cant find info anywhere online....
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      03-01-2009, 11:47 AM   #2
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Quote:
Originally Posted by martinsmu View Post
Can the weight of the tires ONLY (OEM rims) make a difference in a roll performance? I am looking at tires, the 245/35 weigh 22LBS where the 255/35 come in at 24LBS.

From a roll, will the extra weight be a a factor at all? This is just me being curious and cant find info anywhere online....
Yes. Google "rotational mass" and "unsprung weight."
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      03-01-2009, 11:52 AM   #3
martinsmu
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Noticible difference in a roll from 2lbs per corner? I would have greater digg traction with the 255's...
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      03-01-2009, 12:06 PM   #4
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Get a non-rft version of that tire. See how much the unsprung mass decreases.
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      03-01-2009, 03:55 PM   #5
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In theory, light weight tires will have more effect on performance than light weight wheels. The more weight on the outter most edge of a rotating object the more rotational inertia it has, hence more reluctant for that object to rotate. Is 2lb reduction in tire weight noticeable? I doubt it. Getting non run flat tire will reduce the weight, but also improve traction. Between the two added benefits of non run crap tires, I think you'll feel the improved traction more so than the reduced weight. just my $0.02.
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      03-01-2009, 04:12 PM   #6
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Quote:
Originally Posted by akak1997 View Post
In theory, light weight tires will have more effect on performance than light weight wheels. The more weight on the outter most edge of a rotating object the more rotational inertia it has, hence more reluctant for that object to rotate. Is 2lb reduction in tire weight noticeable? I doubt it. Getting non run flat tire will reduce the weight, but also improve traction. Between the two added benefits of non run crap tires, I think you'll feel the improved traction more so than the reduced weight. just my $0.02.
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      03-01-2009, 09:21 PM   #7
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Awesome... thank you for confirming my suspision... Now its to decide between PS2's or f1 asymetrics and star specs...
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