celal

last month I bought a 19'' wheel set from ebay but I read some post that the 19'' is not a good idea on 964. why?

sundog

It puts too much stress on the suspension components. There is a lot of detail on the issues. Use the search function to find a bunch of old threads discussing this in gory detail.

celal

but a lot of 993 uses 19'' rims and the suspensions are very similar with the 964 isnt it?

warmfuzzies

No and No, especially the rear components,

Its been said before, and I'll take the opportunity to say it again, even 18"s are not recomended. Turbo hubs=ok. normal stuff and heavy wheels =hmmm

Kevin

Edgy01

Here's a data point. When Porsche was beginning the engineering work on the 997 Porsches they decided early on that they wanted to have the 19 inch rim as the basic size wheel. The bean counters at Porsche wanted them to retain as many pieces of the suspension that they could from the 996. Unfortunately, in short order, the 19 inch rims were tearing the 996 suspensions apart from the added stress. (The 996 suspensions are substantially beefed up from the 993). Many owners put whatever they want on their cars but you need to understand the price you will pay in safety by doing so. Granted, when Porsche tests their cars they are REALLY driving them into the ground. If you promised never to drive it aggressively and simply drive it like a Camry, then it will be okay.

celal

my car is weekend queen for the street but I deceided to produce t7 aluminum wheel hub for the rear and front and steering rack brace I dont know if its enough for the safety

RonCT

I used 17" Cup 1s with my 964 and "stretched" my comfort zone to use 18" BBS Magnesium Motorsport wheels (extremely light). The car was designed to run on 16" wheels (stock) or optional 17" wheels. Not 18s, and certainly not 19s. You asked for advice, and received it: Don't run 19s.