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Cup One wheels

K

kmdavis

New member
Hi all

I have just picked a full set of original second hand Cup One wheels
part numbers 965.362.1.24.00 7J 17 Front and 965.362.1.26.00 8J 17 Rears.
I am told that these were an option for the 964 can anyone confirm this?
I also need to establish what tyres I should fit and where to buy them from?
I was hoping that the rear wheels were wider than this, so I feel that I will be fitting spacers. What is the best size spacer?
If this make's a difference the car is lowered by 30mm.
Regards Keith Davis
1993 C2 964
 
Keith,

These are Winter wheels designed for the Turbo cars although they were an option for the narrow bodied cars too. The offsets are OK for the narrow bodied cars so you won't NEED spacers. I agree that the rears are a little less than optimal - 9J would be better. The spacer issue is very much for the appearance rather than fit so it depends on how the 8J wheel looks in the wheel arch. To get the edge of the wheel to where a 9J wheel would be would mean fitting a spacer of some 12 to 13mm or thereabouts.

I'd guess tyres would have to be around the 205/50 size for the front and 255/40 for the rear. Pressures would be 36psi all round.

Hope that helps.

Regards

Dave
 
I have these same rims on my 964.

Same rear tire size of 255/40 on either 8J or 9J rims. 205/50 for front.

8J rims sit in the wheelwell where as the 9J rims fill out the wheelwells more.

To get the 8J rims to sit out to the same position as the 9J rims requires 10mm spacers (1/2 rim difference of 12.5mm minus the 3mm offset difference between the wheels gives 9.5mm spacer). You'll need longer studs for 10mm spacers.

I reckon you could also fit 5mm spacers to the front and 15mm spacers to the rear to bring front and back out by another 5mm BUT you would need to try the rears as I can't guarantee they'll work on your lowered car.

Ian.
 
Glad to hear you got the wheels you were looking for Keith! You going to post a picture of the car when the new ones are fitted?

 
Hi Colin yes I will do. Did you see the post I put up about Mathews Time on the formula one 1.26 min, this being the fastest at 4.30PM and also the Porsche Post magazines going for £25.
Keith
 
Ian

Thanks for your response. Can you tell me why when fitting 15mm spacer to the rears that it only pushes the wheel out by 5mm ?I understand this for the fronts but not for the rears. How do your wheels look against the body, I want to filll the arches, I had not considered fitteng spacers to the front. Do you have a spacers?.
Regards Keith Davis
 
Dave

I agree 9J would be better but Hey Ho. I will have to compensate with spacers, have you seen or do you know how I can obtain a Porsche Technical bulletin as mentioed in Adrians Complete 964 Companion. The Bulletin is SB 9602 titled " Installing Distance Spacers on Rear Axles" in his book he recomends 17mm spacers. I would preffer not to have to change the studs in the hub, but have spacers that attach to the existing studs but have there own studs for the wheels.
Regards
Keith
 
Hi Keith - no, I didn't see your other posting. The 1:26 time was (according to Matthew) "full of mistakes" - he reckoned he could have taken another 2-3 seconds faster. He was anxious not to win again on Sunday...

The Porsche Posts went for £25? Damn! I wish I'd gone for them now... that was a nice lot. I've just (as I type!) found out from Matthew that the automobila auction started before we left! Had I known, I would have stayed and bid on them! Aaagh!!!!

Ne'er mind. Looking forward to seeing the pictures of the car with the new wheels.

Regards
 
ORIGINAL: kmdavis

Ian

Thanks for your response. Can you tell me why when fitting 15mm spacer to the rears that it only pushes the wheel out by 5mm
Click to expand...

Sorry you misread my post ... I said the 15mm spacers would push the rears out an extra 5mm to the 10mm I was already suggesting for same look as 9J. So 10mm for 9J look and then an extra 5mm which I reckon would fit would allow a 15mm spacer. I have not tried this look only the 9J look (because I have a spare set of Cup 2s) which looks nice.

If you have a bulletin saying you can fit 17mm spacers then these would be better than 15mm as 15mm is about the smallest you can fit that use the original studs and they are a little thin to support the second set of studs. 17mm would have an extra 2mm of metal so would be stronger.

Regarding front spacers I had heard 5mm spacers were an alternative to fitting the bump stop mod that you are supposed to do to fit 17" wheels. Not done it myself yet but you might want to if you are fitting 17mm rear spacers to balance the look. In fact you might want to go to 7mm front spacers which I believe can be fitted.

I have been debating either 10mm rear spacers only or 15mm rear and 5mm front. But haven't got around to trying it yet (now have 17mm rear and 7mm front to think about too). Unfortunately a certain Mr Hounslow is hogging a bunch of trial spacers ... :)

Ian.
 
I wait to be shot down here but won't the difference in number signify near side and offside? I.e. They are a set with 00 being one side of the car and 01 being the other?
Cheers
Mick
 
The face is identical but spoke backs are different .01 spokes are thicker in design and also weigh more. Which may be an issue.
 
Interesting one mld... not seen that one before. From what I see in the PET catalogue I thought 00 and 01 denote opposite sides of the car and are often marked as such - L/H or R/H (catalogue not in front of me so can't say which is which)...
 
spoke backs are different for 00 vs 01.

front wheels weigh the same.

rear wheels 0.5kg difference between the two on my bathroom scales..............


 
The last 2 digits denote a change/modification, whether it be some small detail, manufacturer or manufacturing process. From memory and as mld has pointed out, I also recall the back of the spokes looking different also the inner rim edge having a lip and the other not. Not sure which was which will have to check mine.
 
More info and theories can be found in this Rennlist thread

00 left / .01 right in picture

088DEBE89B1E4AADB55266037335BCF1.jpg
 
Link to wheel weights

http://www.944racing.de/wheelweights.php


It would appear there is a 600gram diference between the two rears, 01 being heavier than 00.

Fronts are same weight and so should be no problem with a mix..................

 
Must admit, irrespective of weight I would want both wheels identical!
Some don't but I do
Perhaps that's the ocd in me [&:] [;)]
 
Paul ocd, when was that diagnosed.......[;)]

How do you manage when they balance your wheels and one wheel needs 50grams and another 25grams an another 30 etc.......

I bet you can hardly sleep [8|]


OP, you have a mixed set, but the fact that the main Part Number has not changed means they are interchangeable. (the .xx characters are variants of the Original design which occurred during the component life span. Its the only way to manage the component variants.)


If the wheel spec was not interchangeable, a new Part number would be issued.

If you are worried, I will take them off your hands for 50quid

I did'nt think so.[:)]

George


 
ORIGINAL: George Elliott

Paul ocd, when was that diagnosed.......[;)]

How do you manage when they balance your wheels and one wheel needs 50grams and another 25grams an another 30 etc.......

I bet you can hardly sleep [8|]

George
Click to expand...

I think that diagnosis was just some time before some chap named Mr Elliott bought some shocks from me! [;)]

But perhaps it was a misdiagnosis as I would not be bothered about the balancing weights [:D]


 
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