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Bill Verburg Bill Verburg is online now
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Join Date: Dec 2000
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Originally Posted by Pittspirate View Post
Not to belabour the point of my original question….

if I wanted to stick with 215/45/17 up front, and 245/40/17 in the back (I really like the look of the wheels I have), with 18.8 bars up front what might be the optimum bar diameter in the rear be for a car that will probably only ever be road-driven? Stock anti-roll bars.

I don’t have to stick with 27’s in the back; particularly if they are going to make the car less user-friendly.

I’d rather make something closer to right decision now. Budget is not a primary concern.
Again, it just depends on how hard you drive and how much chassis roll bothers you, and whether stock over/under needs to stay or go one way or the other.

Many are perfectly happy w/ stock, in your case that was 18.8/24
18.8/25 imparts a little less under, 18/26 goes a little further
20/26 imparts a little more under and controls roll much better
20/27 is a little more under than the above 18.8 fronts and controls roll

18.8/27 you have now imparts a lot less under partially compensated but the unusually large split between the 205 & 255 tires

going to 215/245 puts the tires back in the more usual split and 18.8/25 puts the car back to stock handling but w/ more grip, that can lead to more roll

To keep the handling more or less stock w/ 215/245 use 18.8/25, to reduce roll use 20/26 or 20/27 one is a compromise a little one way the other a compromise the other, bot control roll well and aren't too harsh,

The front is way more sensitive to harness than the rear, and if it's too harsh for you put a set of twin tube shocks on it.
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Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
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