17" Wheel Fitment

dugsud · Dec 14, 2003

I have a 83 SC with 15" (195 front, 215 rear) teledials fitted & I would like to change them.
A friend has a 94 993 & is going from the 17" cup 2 alloys to 18" cup 3.
My question is will 17" cup 2's (225 front & 245 rear) fit my car?

Thanks

Doug

Guest · Dec 14, 2003

You'll need to run spacers to fit wheels from a post '89 car. The 17s should be fine. I've heard of people using various sized tyres on our cars from 205/50 to 235 fronts and 245/40 to 255/40 rears. You may have to roll the edge of the wings for the larger sizes. Depends on your allignment settings and how low your car is.

bones · Dec 14, 2003

On my '78SC I run Turbo Technology 7.5x17 and 9x17 replicas with the correct off set built into the wheel. The tyres are 215/45 VR17 and 255/40 VR17. There are no contact issues with the bodywork. It has increaesd the grip of the car enormously.

dugsud · Dec 15, 2003

Thanks guys, I think I'll look out for some replicas. Don't fancy using spacers anyway.
I don't suppose anyone knows of some 17" cup 1 or 2 replicas for sale?

bones · Dec 16, 2003

Be careful buying used wheels. You might consider a set of new replicas are not alot of money and will be straight . Look at the wheel ad's in '911&Porsche World' and try . DESIGN 911
TYPE 911
and others

Richard Pottle · Dec 16, 2003

Not sure what the general consesus is but I've been advised that replaica wheels are nowhere near the quality of genuine wheels and should never be used on track

Over the top??

bones · Dec 16, 2003

I replied at length to this but somehow the original post was erased. I have never heard of problems with replica wheels , if you wnat to race use race stamped wheels , for track days and everything else replicas are fine. If I thought I was risking my life by using replicas I wouldn't use them.
If you are still not convince I've seen Porsche cup wheels for £400.00 a set in 911 and Porsche World , so buy those and use spacers with the correct offset.

dugsud · Dec 16, 2003

Personally I'd be quite happy about using non-original wheels for any situation. Don't forget most racing applications are not OEM wheels but compomotive, oz, minilite etc.
Any wheel can break just, ask Robert Dunlop at the TT a few years back when his rear magnesium alloy shattered without warning at 100mph+....ouch!!
I think the main difference with OEM wheels is probably the finish & the ability to withstand salt etc, even that's not so good on some!

bones · Dec 17, 2003

I don't drive my 911 in the winter except for the odd sunny day to keep everything happy. I haven't noticed a problem with corrosion or other degrading factors as yet. The wheels are now 2 n 1/2 years old. There is no way these wheels are of the excellent build quality of the the 16" Fuchs they replaced but for the money I think they are very good value.

Guest · Dec 17, 2003

I've heard that cast wheels can be risky during track use.

>>>Interesting Link Alert!<<<

Guest · Dec 17, 2003

>>>Interesting Link Alert! #2<<<

bones · Dec 17, 2003

This is a quote from one of the posts on the thread mentioned
'.........The fact of the matter is that Wheels, whether they are Fuchs (stock or modified) or racing BBS wheels have a lifespan. My Mechanic has seen cracked wheels from every wheel maker. Thats why Pro teams cycle thru their wheels. Obviously some types will last longer then others, but I would say if you DE or Race the car regularly with stickey rubber, you definately want to keep an eye on them........'
If had oodles of horsepower and was smashing into track type kerbs at high speed then I would definitely use the toughest wheels available . For sane track use and street I think my relatively low powered SC is safe.