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Re: tire sizes for understeer (archive)

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Posted by Jim Rohn on October 07, 2000 at 12:57:56:

In Reply to: Bravo............but I do have a ? posted by Steve B on October 06, 2000 at 23:49:29:

It has been said that putting the same size tires front and back would reduce the understeer. Any thoughts on that?

if you reduce the size of the tire in the back to match the front, the *tendancy* is to create more oversteer or less understeer. If you tried to match the rear tire size with the front, that is the wrong way to go, as the tire is too large for the rim size.

Ideally running the same size tires and wheels front and rear would be best

MOST cases of understeer occur because of entry speeds being too high or the driver upsetting the balance of the car.

Minor adjustments in tire pressures can dial out some of the understeer (higher back pressure to give less rear grip) but you really need to mark your tires and read the rollover *or* take temperature readings to REALLY know what you and the tires are doing.


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