Suspension/Wheels/Tires/Brakes

Undersized tire on an oversized wheel?

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Old 07-15-04, 10:37 PM
  #26  
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Originally posted by RETed
Your statements are dangerous.
I've inspected a few of these set-up's, and it's scary to see the tire "rolling over" to the sidewall on heavy cornering.
The tire is not designed to ride half-way up it's sidewall.
I'm talking beyond the tread blocks; the tires show scuffing on the LETTERS on the sidewall.


-Ted
If the tire is rolling over past the edge of the tread either the pressure is too low or it doesn't have enough camber. Obviously you can go too far but a rim 1/2 to maybe 1 inch wider than the tread will probably work OK.

If you have to resort to the propane trick then it's way too wide. The biggest problem you'll have with a rim that's too wide is bent rims from potholes.

ed
Old 07-15-04, 10:55 PM
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Originally posted by niburu
less pressure will not put more rubber on the road, it puts less down, the tires will bow up in the middle, always inflate your tires to the recommended pressure for full traction
Lower pressure isn't always better. There's a right pressure for the car and camber you've got.

It's just that the better the tire is supported by the rim, the less pressure it needs.

If the rim is too wide or the pressure is too low, you lose traction.

The manufacturer quotes a spec for all-around conditions. If you go outside those specs you will give up on some of the areas that the manufacturer thinks is important. It doesn't necessarily mean it won't work.

Wide rims will make more noise, less pothole protection, etc. But for rims that aren't WAY too wide, you'll probably get better traction.

Tire temperatures give fast feedback but tire wear also gives accurate information on what's happening between the rubber and the road. It just takes longer.

ed
Old 07-15-04, 11:39 PM
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Originally posted by edmcguirk
The manufacturer quotes a spec for all-around conditions. If you go outside those specs you will give up on some of the areas that the manufacturer thinks is important. It doesn't necessarily mean it won't work.
It is also quoted for safe operating conditions, and trying to apply outside of manufacturer recommendations is taking a big risk in safety.


-Ted




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