How would these fit a 1987 S4
10-01-2011, 08:04 PM
#1
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How would these fit a 1987 S4
Offset of the wheels good for the 928?
How about the width of tires? Any rubbing or fender rolling required?
http://cgi.ebay.com/ebaymotors/18-PO...item336cabe4c7
How about the width of tires? Any rubbing or fender rolling required?
http://cgi.ebay.com/ebaymotors/18-PO...item336cabe4c7
10-01-2011, 08:22 PM
#3
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The wheels should fit fine both at the front and at the rear. The tires currently on the rims are another issue, the 928 was designed with a 24.7 inch tire diameter. The diamater of the 245/50 18 is 27.6" and the 275/45 18 is 27.7" some 3" larger in diameter than the car was designed for. That big a variance would cause several issues including, probable tire contact at the front fenders, a loss of acceleration due to taller tires, and the speedometer being "slower" than actual by several miles an hour. With tires of a lower aspect ratio that were close to the 24.7" stock tire diameter the wheels would work well.
Paul
1980 Euro S Red/Blk Lea
Paul
1980 Euro S Red/Blk Lea
10-01-2011, 10:51 PM
#7
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The wheels should fit fine both at the front and at the rear. The tires currently on the rims are another issue, the 928 was designed with a 24.7 inch tire diameter. The diamater of the 245/50 18 is 27.6" and the 275/45 18 is 27.7" some 3" larger in diameter than the car was designed for. That big a variance would cause several issues including, probable tire contact at the front fenders, a loss of acceleration due to taller tires, and the speedometer being "slower" than actual by several miles an hour. With tires of a lower aspect ratio that were close to the 24.7" stock tire diameter the wheels would work well.
Paul
1980 Euro S Red/Blk Lea
Paul
1980 Euro S Red/Blk Lea
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10-01-2011, 11:13 PM
#8
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The 88 5 spd for sale about half way down this page has these same wheels on it, I think. Have a look there.
Jerry Feather
Jerry Feather
10-02-2011, 08:05 AM
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Eric,
A 245/35 18 is 24.8" and very close to the stock 24.7" diamater and fits on an 8" wide rim and would work well on the front, and would work on the rears too. A 265/35 18 would fit on the 9" rear rims, it is 25.3" in diameter. An increase of 0.6 inches has very minor impact on the speedometer reading versus actual. It is quite common for people to run tires with a half inch or so variance to stock tire overall diamater without problems. Since you have two different wheel sizes (8" and 9" wide) I would go with the 245/265 combo. The use of 245's on the front will be a big advantage, IMO a 928 with 225's on the front is undertired.
My car currently rides on 255/40 17's on the front and 295/35 17's on the rear and the sizes were chosen for the diamater as much as for the width.
Paul
1980 Euro S Red/Blk Lea
A 245/35 18 is 24.8" and very close to the stock 24.7" diamater and fits on an 8" wide rim and would work well on the front, and would work on the rears too. A 265/35 18 would fit on the 9" rear rims, it is 25.3" in diameter. An increase of 0.6 inches has very minor impact on the speedometer reading versus actual. It is quite common for people to run tires with a half inch or so variance to stock tire overall diamater without problems. Since you have two different wheel sizes (8" and 9" wide) I would go with the 245/265 combo. The use of 245's on the front will be a big advantage, IMO a 928 with 225's on the front is undertired.
My car currently rides on 255/40 17's on the front and 295/35 17's on the rear and the sizes were chosen for the diamater as much as for the width.
Paul
1980 Euro S Red/Blk Lea
Last edited by VT928; 10-02-2011 at 08:25 AM.
10-02-2011, 09:48 AM
#10
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The wheel/tire combo looks a good price but not so sure that is the case if you have to buy new rubber [as you should] at something like $1.5k a set for good rubber unless you can sell on the current rubber for a decent price.
If you mount that combo on the front with a stock alignment[0.5 camber] I suspect you will be pretty close to rubbing on the outer fender, especially if the fenders have not been rolled.
If you have the US gearing on your S4 would you really want to run the rears with 3 inch bigger OD on top of the 2.2ratio [if that is what you have]? Also, if you have a 9 inch rear you will be limited to the section you can fit at the correct profile- probably 265x35 will be the limit but you can check this on the tirerack website. With 245 up front and 265 on the rear you will have a good set up but I would not roll with the profiles currently fitted- too tall IMHO.
Regards
Fred
A front offset of 59mm will probably work but you will be losing 6mm of negative scrub radius- I suspect you will not notice this unless or until you are on the track and even then...?
If you mount that combo on the front with a stock alignment[0.5 camber] I suspect you will be pretty close to rubbing on the outer fender, especially if the fenders have not been rolled.
If you have the US gearing on your S4 would you really want to run the rears with 3 inch bigger OD on top of the 2.2ratio [if that is what you have]? Also, if you have a 9 inch rear you will be limited to the section you can fit at the correct profile- probably 265x35 will be the limit but you can check this on the tirerack website. With 245 up front and 265 on the rear you will have a good set up but I would not roll with the profiles currently fitted- too tall IMHO.
Regards
Fred
A front offset of 59mm will probably work but you will be losing 6mm of negative scrub radius- I suspect you will not notice this unless or until you are on the track and even then...?
10-02-2011, 10:44 AM
#11
928 Collector
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I couldn't disagree more. I've run 19's on Godzilla for years with no issues. While what you say is all correct Paul, the three and wheels will work.... depends on what you're willing to sacrifice. I experience no loss in acceleration, and I find that only over 90mph does the wheel rolling radius make a noticeable difference in indicated speed. Our speedometers are not accurate at those speeds anyway.
The wheels should fit fine both at the front and at the rear. The tires currently on the rims are another issue, the 928 was designed with a 24.7 inch tire diameter. The diamater of the 245/50 18 is 27.6" and the 275/45 18 is 27.7" some 3" larger in diameter than the car was designed for. That big a variance would cause several issues including, probable tire contact at the front fenders, a loss of acceleration due to taller tires, and the speedometer being "slower" than actual by several miles an hour. With tires of a lower aspect ratio that were close to the 24.7" stock tire diameter the wheels would work well.
Paul
1980 Euro S Red/Blk Lea
Paul
1980 Euro S Red/Blk Lea
10-02-2011, 07:07 PM
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Fred,
I thought about the loss of 6mm of offset, however it it really not an issue. The 8" Club Sport front rim has a 60mm offset so in reality Eric's car would be only 1mm off. On a street car with stock bushings I doubt anyone would ever be able to notice the difference. IIRC the CS allignment specs are the same as non CS cars. The rims are just about as good as you can get with a commonly available wheel at reasonable cost. If Eric has to buy tires the idea that the change over can be done at reasonable cost goes out the window.
Paul
1980 Euro S Red/Blk Lea
I thought about the loss of 6mm of offset, however it it really not an issue. The 8" Club Sport front rim has a 60mm offset so in reality Eric's car would be only 1mm off. On a street car with stock bushings I doubt anyone would ever be able to notice the difference. IIRC the CS allignment specs are the same as non CS cars. The rims are just about as good as you can get with a commonly available wheel at reasonable cost. If Eric has to buy tires the idea that the change over can be done at reasonable cost goes out the window.
Paul
1980 Euro S Red/Blk Lea
10-02-2011, 07:17 PM
#14
Nordschleife Master
Also the wheels Eric linked aren't the cheapest on ebay of that design, by a wide margin - I suspect he just linked them to avoid someone jumping his claim
