Cup 1's - What size?
#1
Racer
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Join Date: Aug 2003
Location: London / Fort Lauderdale
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Cup 1's - What size?
My car is on D90's. I want to change to Cups 1 wheels. I have seen a set for sale.
Q: They say front 17 X8 / Back 17 X10. Should they not be the same front & rear?
Q: Do i need to fit spacers or will they go straight on?
Thanks
Derek
Q: They say front 17 X8 / Back 17 X10. Should they not be the same front & rear?
Q: Do i need to fit spacers or will they go straight on?
Thanks
Derek
#2
Agent Orange
Rennlist Member
Rennlist Member
A: That's a very rare combo for cup cars, IIRC. Because your car is not a VW You have a RWD, rear engined Porsche, you need more rubber in the back.
A: Depends on what year your car is, but with those sizes you will definitely need modifications - spacers up front, and/or install 10mm steering stops and spacers in the rear along with flattening the oil line. You may need to roll your fenders as well.
Where did you find those wheels?
A: Depends on what year your car is, but with those sizes you will definitely need modifications - spacers up front, and/or install 10mm steering stops and spacers in the rear along with flattening the oil line. You may need to roll your fenders as well.
Where did you find those wheels?
#6
Rennlist Member
Those aren't factory wheels. The factory cup 1's only came in 7 or 8 inch widths for the fronts and 9 inch width for the rears. 7 & 9's are ET 55.
#7
Originally Posted by cobalt
Those aren't factory wheels. The factory cup 1's only came in 7 or 8 inch widths for the fronts and 9 inch width for the rears. 7 & 9's are ET 55.
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#8
Rennlist Member
Originally Posted by dave morris
I think there were also 7.5jx17 with et55 and et65 (part # 965 362 124 15 and 05). Plus ... there were 9.5j17 with et68 (part # 965 362 128 05). I really like the Cup I wheels ... but they were all pretty heavy.
This is the list as I know it not including the magnesium versions. Can't get them to line up but I think you will get the idea.
7 J
7 J
7.5 J
8 J
8 J
9 J
9.5 J
55
55
65
52
52
55
68
965.362.124.00
965.362.124.01
965.362.124.05
965.362.126.00
965.362.126.01
965.362.128.00
965.362.128.05
9.3 kg
9.3 kg
10.6 kg
10.0 kg
10.6 kg
11.8 kg
12.5 kg
#10
Hey, thanks Anthony. I just learned something because of your post. I've long wondered about the difference between the two 8jx17s. Now I know that at least one difference is that one weighs 22.0462 #s and the other weighs 23.36897 #s. I'm still wondering why Porsche made two so similar wheels. I suspect the same is true for the 7s, 7.5s and 9s (?) but haven't done the math. Hmmmm.....
#11
Originally Posted by cobalt
I believe the 7.5 was used on the GTS and must have the sensors to work.
#12
Originally Posted by cobalt
Stand corrected I believe the 7.5 was used on the GTS and must have the sensors to work.
This is the list as I know it not including the magnesium versions. Can't get them to line up but I think you will get the idea.
7 J
7 J
7.5 J
8 J
8 J
9 J
9.5 J
55
55
65
52
52
55
68
965.362.124.00
965.362.124.01
965.362.124.05
965.362.126.00
965.362.126.01
965.362.128.00
965.362.128.05
9.3 kg
9.3 kg
10.6 kg
10.0 kg
10.6 kg
11.8 kg
12.5 kg
This is the list as I know it not including the magnesium versions. Can't get them to line up but I think you will get the idea.
7 J
7 J
7.5 J
8 J
8 J
9 J
9.5 J
55
55
65
52
52
55
68
965.362.124.00
965.362.124.01
965.362.124.05
965.362.126.00
965.362.126.01
965.362.128.00
965.362.128.05
9.3 kg
9.3 kg
10.6 kg
10.0 kg
10.6 kg
11.8 kg
12.5 kg