Paulyy

Why i ask this?

I found this on this forum posted a long time ago.




18-INCH WHEEL INSTALLATION NOT APPROVED
Article Text
1987 Porsche 944
Tuesday, August28, 2001 11:31AM

ARTICLE BEGINNING

TECHNICAL SERVICE BULLETIN

INSTALLATION OF 18" WHEELS NOT APPROVED

Model All Porsche Models
Group 4
Bulletin No. 9305
Date April 15, 1993

Concern:

Retrofitting 18" wheels on Porsche vehicles which do not have 18" wheels as original equipment is NOT ALLOWED.

General Information:

Endurance tests have shown that equipping certain Porsche vehicles with 18" wheels in an application not already approved by Porsche Cars, N.A. may result in loosened bolts and /or threaded connections on the front wheel carriers. This, in turn, may cause fractures in these components. Fractures may also occur in the front strut mounts and in the body in the area of the rear suspension as a result of the installation of 18" wheels not already approved for installation for this specific application.
Such damage can occur without warning and the vehicle may become very hard to control/steer as a result of the improper installation.
Porsche dealer personnel coming in contact with a vehicle that has been retrofitted with 18" wheels in an application not approved by Porsche, should inform the owner of the potential for damage to their vehicle and loss of steering control. Porsche Cars, N.A. should also be notified of any vehicles retrofitted with 18" wheels.

END OF ARTICLE

333pg333

Meh, that's just some blurb by Porsche USA trying to remove themselves for any liability due to component failure. How many people have run 18's on their cars without crashing to hell.

Paulyy

I forgot to make this clear. I'm not worried because i know most have 18's on their 944s. I just found it and was curious.


Pretty much what i though. a guy on the PFA want's new 18s for his 944t and when i was looking to tell him what casters to replace the factory ones with, i found that too.

NZ951

Yup, I had heaps of issues... went through 3 ball joints (rebuilt then new) in quick succession when going from 16's to 18's Simmons.

86 951 Driver

You are supposed to upgrade to the better caster blocks as a minimum. People race wth 18's all the time.

blade7

My car has had 18" wheels on it for years, what's relevant is the weight of the wheels/tyres. If they are heavier the car probably needs stiffer dampers/springs to control them. KW's are my choice.

theedge

Youd absolutely want the later castor blocks. You want those anyway, theyre way better than the old blocks of soggy meatloaf style ones.