blade7 said:
The 18" wheels will be heavier than the standard wheels. You would need to uprate the suspension, which will most likely give a harsher ride.
Why would you "Need to uprate the Suspension" the only thing I'm assuming you mean is to change the shock absorbers and springs?
Or do you mean some other component of the suspension ?
Only this is one of the most common mistakes many people do, fit less compliant heavier (Bigger rim diameters & Smaller Sidewall tyres) and also
stiffer shock absorbers and stiffer & Lower springs ...which when all done at once creates a massive adverse change in the car's ability to drive nicely
on public roads.
Changing just the wheels (up 1" ideally or if people insist 2" bigger) on it's own will create many different characteristics of how the car feels and drives,
and unless the stock shock absorbers are shot are worn, replacing them with versions that offer even less movement and compliance makes matters even worst..
It would be better to just fit larger wheels, not lower the ride height or stiffen the shock absorbers this will only wear out other components
at a much faster rate, not to mention the adverse handling.
The Porsche bulletin whenever that was written from memory suggests it's the size and calculated strength of the 944 suspension that is in their opinion
is not suitable to be fitted with 18" wheels.
Quoting they fitted them to the handful of 968 RS's is hardly an ideal approval that they will be fine, and how many 968's have you seen with Porsche
18" wheels? The replacement (Boxster) was designed and started it's life with 16" wheels just as the 944 S2 & Turbo did. Many Boxster owners also
have the same debate, some like fitting huge hoops, some most won't go anywhere near such a venture because it's not ideal and only for the extremists.
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