Just put some 15mm rear and 7mm front, RSS spacers on last night. Just found out the wobble like a !#@$% at 55mph. Its coming from the front as those spacers are not hubcentric. Is there a trick? Of course there were no directions, which would not be needed for the rear as they only go on one way and align perfectly.

I've read a few threads that says "ya, they will do that" but nobody has a solution really?? I can't believe this is rocket science. One side has a groove around the hub area, the other side is flat, no indication of "this side out" or directions of any kind.

 

I would investigate further. I've run both 7 mm and 15 mm RSS spacers for a few years and have never experienced a wobble due to the spacers. Wobble due to a weight falling off but never due to spacers. Make sure the hub face and rim is clean and free from any contamination.

Hope you find the issue.

 

Thanks, ya, I just pulled one of the fronts off to inspect. I don't see anything obvious, but something got out of whack up there. I mean it was a pronounced wobble, like drive immediately home.

I can see where the three prongs on the existing hob are now too short to really center the wheel at all, so it wouldn't take much to get it out of center.

 

heres what you want, the front and rear hub have flanges that stick out. they look different on front and rear.
the wheel hole goes onto the flange and that centers the wheel. the lugs dont make it fit center.
the spacer on the rear should have a duplicate flange that the wheel fits onto
the front 7 doesnt need a flange because the hub still sticks out far enough for the wheel to center up on
I dont think you have the right spacers or you dont have the wheel bolted on straight

 

I just checked the starboard side BEFORE I unmounted it, pulled the center cap off. Looking at the centering prongs on the hub it was certainly a little closer on one of the prongs than the others...out of center. There is definitely NOT enough of the prongs/ears with a 7mm spacer to still center the wheel, it has to be done by eye. I'm going to do both sides again, and watch closely as I keep it centered, then tighten everything up slowly and give it a test run.

 

Well it got better but there is vibration throughout the car.

Uuuhgh... live and learn. I like the subtle look difference but not at the cost ride quality.

 

I thought only Ricers used spacers?
Remove them, problem solved.

 

are there not hubcentric spacers? spacers are an oem option from porsche, so with the right ones it 100% should not be a problem.

 

I'm having the same problem. Purchased RSS spacers and had a lot of vibration. Local dealer checked them and the entire front end but couldn't find a problem. Remove the spacers and the wobble goes away. I returned them and purchased another brand. Much better but still have a slight wobble. Currently researching hub centric 7mm spacers. I'm not certain the 5mm OEM spacers are technically hubcentric.

 

does anyone have a photo of the spacers front and back?

back when i used to play with cars, the vibration over 60miles/100km/h occurs when running wheels/spacers that are missing hubrings or are non-hubcentric.

richFL, the porsche dealer didnt have thier own spacers they could sell you perhaps?

 

Did the spacers come with longer bolts or are you using the originals?

 

OEM from Porsche are only 6mm front and back.

 

Look through the rim and make sure the rim mounting surface is flush to the spacer all the way around.

I run 7/15 spacers and have no problems with the fronts. The fronts are definitely a little more tricky to mount though. My rims just grab the hub that sticks out through the spacer, but it requires me to hold the rim hard against the spacer until I get a couple of lug bolts in hand tight. I turn the hub until one of the hub "prongs" is at the top, then using two hands place the rim directly on to it, removing the center caps makes this much easier, then hold it there with one hand, some force is required to keep it in place, then get a couple of lug bolts in hand tight.

 

Pretty ignorant post - Porsche uses pacers to adjust the offset of the wheel.

 

I can post some pics of whatever...as the spacers are OFF now. Yes the came with proper bolts.

Some observations...

1. the rear spacers even though they are hubcentric, they are not a precise snug fit on the HUB, maybe 1/2 to 1 mm slop...if you can call it that. That might be just enough that at speed they would vibrate. In taking off the spacers, the spacers on the rear were stuck tight to the wheel, but not the hub. It was obvious when I remounted the wheel with no spacer the precise tight fit that was achieved with no spacers. So some precision is being lost along the way.

2. the front spacers NEED to have a hubcetric mill to them and these do not. There is no way to really precisely line up the fronts as the alignment tab. The hubs do not have enough of the tabs exposed to barely touch the wheel, let alone center it. It all has to be done by sight.