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New Tires, going 255 up front?

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Old 08-22-2017, 12:27 PM
  #16  
arter
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Originally Posted by Soapman72
If the diameter of the front tire is slightly smaller than the rear due to the narrower width, then don't you need to maintain the diameter difference between front and rear, so that the ABS and traction control intervene at the correct time and in the correct amount?

With other cars I've owned, you would notice if you didn't maintain this difference. I'm all for reducing understeer, but perhaps messing with the factory stagger is not the smartest way to go.

Thoughts?
Usual rule of thumb is to maintain the stock OEM ratio of tire diameters within about 2% to not effect the traction control systems, when you change tire sizes. So you could make both larger or both smaller ( in diameter) with little effect as long as you maintain the ratios correctly.
Old 08-23-2017, 10:16 PM
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Soapman72
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For sure....that is understood. Generally, if you change front size you also change the rear, in order to maintain the diameter difference.

This is why I mentioned suspension tuning as a better way to accomplish the goal of reduced understeer. As a first step, you could probably make a small improvement by adjusting tire pressures.
Old 09-08-2018, 04:01 PM
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mymac
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So dose putting these wider tires 255/305 have any effect on fuel milage? Not that it really matters???
Old 09-08-2018, 04:46 PM
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Homeles
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Originally Posted by mymac
So dose putting these wider tires 255/305 have any effect on fuel milage? Not that it really matters???
not that I’ve noticed. If ur interested, I have a new sticker pair for sale
Old 09-08-2018, 06:07 PM
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I am in the market for some new shoes (20"), what do mean by sticker ?
Old 09-08-2018, 10:50 PM
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I've been running 255's up front for autocross, can't say I see much difference. Probably trading some turn in response for some total grip. Going to try 265 on my next set



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