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-   -   18" wheels (https://reutterwerk.com/forums/showthread.php?t=5968)

warmfuzzies 01-31-2009 04:04 PM

18" wheels
 
Should I?

Well I have but like Marc, I wanted to have my first thread here.......roll on :icon107:

JimQ 01-31-2009 05:51 PM

we need to get some more people to come on over! :cheers:

warmfuzzies 02-01-2009 01:01 AM

Spread the word gently, and I guess if IB forums annoy us all too much, we'll just migrate over.

Kevin

Bill Verburg 02-12-2009 01:28 PM

Quote:

Originally Posted by warmfuzzies (Post 49707)
Should I?

Well I have but like Marc, I wanted to have my first thread here.......roll on :icon107:

Why not? The factory did caution against their use but there are many 964s that are so equipped.

Tire clearance can be an issue but as long as reasonable tire choices are made it can work.

I do have to say that to my eye, 8 & 9 x17 Cup1s look perfect on 964s

911URGE 03-06-2009 02:13 AM

Quote:

Originally Posted by Bill Verburg (Post 51230)
Why not? The factory did caution against their use but there are many 964s that are so equipped.

Tire clearance can be an issue but as long as reasonable tire choices are made it can work.

I do have to say that to my eye, 8 & 9 x17 Cup1s look perfect on 964s

Agreed on the CUP I's but those Carrera III 5-spokes really catch my eye.

Wasn't there a steering rack support that could be used on the 964 if using 18" wheels?

Bill Verburg 03-07-2009 06:47 PM

Quote:

Originally Posted by 911URGE (Post 54275)
...Wasn't there a steering rack support that could be used on the 964 if using 18" wheels?

The 993 steering rack brace can be used w/ 964, it's a tighter fit than on 993 though
993.347.131.02 brace
999.218.103.09 8x80 bolts x2

993
http://forums.pelicanparts.com/uploa...1210423324.jpg


'90 964
http://forums.pelicanparts.com/uploa...1152485073.jpg

also fits the manual 964 rack w/o issue, but there are 2 different 964 power racks, don't know how tight the other one might be.

Yellowducman 04-14-2009 04:35 PM

That support is a new one on me. Does it really make a difference with 18" wheels?

Noah 04-14-2009 10:50 PM

Quote:

Originally Posted by warmfuzzies (Post 49707)
Should I?

Well I have but like Marc, I wanted to have my first thread here.......roll on :icon107:

Kevin,

Adrian had 18's on his C4. Then went to 19's.

Thanks for allowing me my first post.

____________

Noah

93 RSA

aeroman 04-18-2009 12:46 PM

If you are going to track it here you won't pass safety exam with 18s unless you have an aftermarket suspension.

Bill Verburg 05-03-2009 08:37 PM

Quote:

Originally Posted by Yellowducman (Post 60246)
That support is a new one on me. Does it really make a difference with 18" wheels?

yes, it was standard on later 993s that came oem w/ 18s

Gyro 05-15-2009 11:57 AM

Quote:

Originally Posted by Noah (Post 60532)
Kevin,

Adrian had 18's on his C4. Then went to 19's.

Thanks for allowing me my first post.

____________

Noah

93 RSA

Hi,
Adrian never put 18 inch wheels on his C4 when he owned it. He went from 17 inch to 19 inch. However, its new owner did a few laps of the Nürburgring and broke the rear suspension (KONI).

Noah 05-16-2009 02:01 PM

Quote:

Originally Posted by Gyro (Post 73094)
Hi,
Adrian never put 18 inch wheels on his C4 when he owned it. He went from 17 inch to 19 inch. However, its new owner did a few laps of the Nürburgring and broke the rear suspension (KONI).

Thanks for that correction! I do remember the Koni's and - I believe - the
19's were/are Sportec. But perhaps a search is better than my memory.

Gyro 05-18-2009 04:25 AM

Quote:

Originally Posted by Noah (Post 73452)
Thanks for that correction! I do remember the Koni's and - I believe - the
19's were/are Sportec. But perhaps a search is better than my memory.

Sportec Mono 10s with the original aftermarket KONI sports suspension designed specifically for the model year 1989 and 1990 Carrera 4.

The original 964 design provided good grip or traction using lightweight 16 inch D90 wheels, but what you have to remember that it's not the wheel diameter in itself that's the problem, it's the wheel width and wider lower profile tyres which comes with the greater diameter; and additional weight.
Wider lower profile tyres provide a larger contact patch and hence an improvement in grip, but greater resistance to changing direction. The more resistance to a change of wheel direction the greater the stress placed upon every component in the 964's wheel carrying and suspension system.
Every 964 is between 15 and 20 years old and fitting wider wheels and tyres places additional stress on already worn components. It's not just the major assemblies either, its every nut, bolt, bushing, support, mount, clamp etc etc.
Keep in mind also that just replacing struts and shocks still leaves many other components to fail under the additional stress.


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