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My 84 came with the optional extended rear wheel studs and spacers. The spacer is 20mm thick and works well with the stock closed lug nuts. How thin a spacer can I use and still use the closed end lug nuts? Are there 10mm spacers or what kind of options came from the factory?
As I am aware the nuts and the studs are specifically matched to the spacer specified. You want to fit a narrower spacer you run with open lug nuts as I do on my rears.
Why would you want to move the wheels in and narrow the track of the car, or are you trying to fit different wheels with a different offset that will require a different spacer? The answer is open lug nuts as stated. Some people install an open one to hold the wheel properly then put the closed end one on over it for aesthetics. Make sure the open end lug nuts you buy gave the same seat type to match the wheels. On Porsche wheels, that's a rounded ball or radius seat (left), not a tapered or conical seat (right).
I have a set of BBS rear wheels that are 9.5 inches wide. I thought that they would approach the fender more than the stock, but found that they already compensated for it at manufacture. neither one of those bolts are corrcet, but i agree that the ball seat is correct for the wheels.
I have a set of BBS rear wheels that are 9.5 inches wide. I thought that they would approach the fender more than the stock, but found that they already compensated for it at manufacture. neither one of those bolts are corrcet, but i agree that the ball seat is correct for the wheels.
9.5 inches width is mostly irrelevant in the big picture- it is the offset that is potentially significant
I have a set of BBS rear wheels that are 9.5 inches wide. I thought that they would approach the fender more than the stock, but found that they already compensated for it at manufacture. neither one of those bolts are corrcet, but i agree that the ball seat is correct for the wheels.
Correct. The left one is from a 997 but has the correct seat profile.
Could you try screwing down the stock lug nut on to the stud with the wheel off and the spacer in place to measure the space as you tighten the lug nut? Obviously, you wouldn't want to run it all the way to tight but, you should be able to get a pretty good idea of how much room you have to go with a smaller spacer? Just a thought.....
The limit behind the BBS hub cap determines how far in I can move the wheel without the stud contacting the cover. I thought the increased width would cause the tire to contact the fender with the 20 mm spacer. Being that I couldn't use the wheel without the 20mm spacer due to the stud projecting beyond the mounting face of the hub cap, I therefore thought of using a thinner spacer.. As it turns out, The wheel accommodated the spacer by having the correct offset for
it. Its close, but does not touch. Yes, I know the front end hasn't settled yet...
03-07-2020, 01:50 PM
Wheel spacer question
