Dwane

Remember reading they were not approved...What was that ALL about?
I am looking at a set of 18" Cayman wheels 18x8"front and 18x 9"rear.
Any help or insight would be appreciated!
thanks
Dwane

Nine11

Will they fit? I recall looking at a set and somebody told me they won't fit onto a NB 964.

911URGE

If you put 18" wheels on a 964 you may want to consider installing the steering brace for the front rack.

Porsche wrote a TSB stating do not use 18" wheels but many still do without issues. I have read that the 18" wheels put much more stress on the suspension and could lead to failure in high stress driving (DE, AutoX). I even read one comment that 964's with 18" wheels may not pass some regions tech/safety inspection due to the wheel size.

BobH20man

I have a NB 964 and they fit with 225/40 x 18 front and 265/35 x18 rear. On sharp turns the fronts rub a little, so I use 5mm spacers (and longer lugs) which helps. But that has never been a problem. At about 21 lbs, they are also are pretty light weight. I like them a lot.

BobH20man

P.S. I did install the steering brace for the front rack.

jim_l

clue me in whats the advantage of running 18's insteed of 16's

Nine11

Here's the responses when I posted the question...
https://rennlist.com/forums/964-foru...ghlight=Cayman

I guess some say they will fit....

junkart

pardon the newb question but what is steering brace? is it the same with strut tower brace? if not, what is it look like?

Dwane

Where do we get the steering brace?
Is it an easy install?(I did my dizzy belt)
thanks
Dwane

BobH20man

Attached (I hope) is Technical Bulletin 9604. If not attached, let me know and I will email to you. Although it says it for a 993, I was told by a PCA tech person it would fit my 964. I ordered it through my local Porsche dealer for $75 along with the required longer allen bolts and had them do the install. The part number for the steering brace is 993.347.131.02 and the 80mm allen bolts are 993.218.103.09 (x 4).

sleder

I run 245x35x18 and I did the steering brace

CWay27

I wouldn't go 18s just because I can get a good deal on cayman wheels, they're heavy. Wait till you can get a nice set of BBS RX or CCWs. No point really in spending more on rubber in 18'' for boat anchors. Sorry guys but stock cayman wheels in 18 are really heavy.

ABQ Slim

Here's the TSB saying no way, any way for 18" wheels. I know many of you run 18" wheels, so I don't know if there's information or technology out there that's superceded this TSB, but it looks like it's just not supported.

http://www.pcarworkshop.com/images/d...0593geolab.pdf

BobH20man

Regarding the weight of Cayman S wheel, here is an email from Wheel Enhancement comparing it to Fiske, BBS and HRE.

-----Original Message-----
From: David Martin <dave@wheelenhancement.com>
Sent: Monday, February 09, 2009 6:01 PM
Subject: RE: wheels for 1991 narrow body C2

Bob, here are the weights for the Cayman S wheels:

Porsche Factory Cayman S
8x18” 21 lbs. 9 oz.
9x18” 22 lbs. 15 oz.


Fikse FM10
8.5x18” 20 lbs. 11 oz.
10x18” 20 lbs. 15 oz.

BBS RS-GT
8x18” 20 lbs. 13 oz.
9.5x18” 22 lbs. 2 oz.

HRE C80
8.5x18” 18 lbs. 14 oz.
10x18” 20 lbs. 2 oz.

junkart

A friend suggested the MY02 996C2 'Lightweights'... anybody knows how they are compare the the above list? The only draw back is you have to run spacers on the rear.

How about 997 Carrera non-s 18" 5-spoke?