I was curious as to what the best 15mm spacer to run is. I'm looking at the H/R ones with integrated studs right now but im not 100% sure which ones will fit. Im trying to get the rear to sit more flush since the front is flush with the fender and im running tsw nurburgring's with a 63 offset in the rear. My fenders have a slight roll but the fronts are sitting completely flush with the fenders and have less of a roll than the rears and I never get any rubbing at all. I'm also lowered to a little less than 1 finger gap in the front and a 1 finger gap in the rear running 225/40's and 255/45's. Oh, and the hub bore for the TSW's is 76mm but im not quite sure what difference that makes. Any advice is much appreciated and ill work on getting pictures up as soon as I get home.

 

Rear bore is 64.1, so that's the bore you'll need to get. H&R is a reputable brand if you're going integrated studs (street duty). If you're tracking, go for extended studs and use ARP studs and then you can use almost any ebay aluminum spacer with 64.1 bore (you can throw away whatever crap extended studs they include with the spacers). Extended studs require new wheel bearings and professional installation.

 

I think you need wheels with 10 holes like some of Volks(CE28, CE30)to use integrated stud spacers or there has to be room in the back of the wheels.
Anything over 3mm without integrated stud spacers and you need extended studs. I installed them myself. You have to pop all the ball joints to remove the hub, then have someone with a press press out the bearing, press out the old studs and press in the new ones and press in the new bearing. Then of course put everything back together again. It is a big job.

To replace the wheel lugs you must remove the hub. To remove the hub you will destroy your old bearings.

https://robrobinette.com/S2000Bearing.htm

 

15mm would be the safe increased spacing for your rear with the wheel offset you have (assuming its the 9" width) 20mm would sit even more flush with the fender line without going overboard as long as you have done the adequate fender rolling as well as the common bumper tab relocate and trimming mod. If not, then id stick to +15. But that's also assuming your wheels have an indent deep enough to accommodate the spacer nuts that protrude on a 15mm spacer. That I don't know for that particular wheel. They are all a little different. Some wheels cant go smaller then a 20mm spacer.

5mm has been the more common consensus for max spacer width to still get 6 full nut rotations. But that's on OEM wheels, running the rears up front for a square set up to clear the front hubs, and some wheels I imagine are a little thicker hub area making 5mm questionable. I run a 3mm up front on my rpf1 and still get plenty of turn's, so id have no problem moving up to a 5mm if I needed it. But this is all irrelevant to the OP.

 

Is autox included in track duty? It will probably be a while before I hit Road Atlanta again but i definately need something that will hold up to autox. I'd rather not go through the pain of getting extended studs, so how hard would it be to uninstall the spacers like 2-3 times per season to autox if they wont hold up?

 

Is autox included in track duty? It will probably be a while before I hit Road Atlanta again but i definately need something that will hold up to autox. I'd rather not go through the pain of getting extended studs, so how hard would it be to uninstall the spacers like 2-3 times per season to autox if they wont hold up?
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They will hold up. But if your the unsure/nervous type, they aren't anymore difficult then unbolting your wheels. Do it at the same time when you swap track pads or flush brake fluid etc.

 

This is what the TSW's look like from the rear. do you think this is enough space to run 15mm or 20mm integrated spacers?

 

Looks like you will have no problem running the 15mm spacers. Plenty of indent there to accommodate the protruding hex nuts.

 

seconding junky here.

but also wanted to post my experience with spacers. i used 20mm spacers on my stock ap2v1 wheels no problem, but when i moved to a 255 and a 15mm, i had to shave off about 2mm of the studs on the spacers studs. if i didn't, it would blow on the ends of the stock lugs.


a 20mm should clear no problem, but a 15mm may be harder to fit because the stock studs may stick out too much.

 

From what I can see a 15mm should clear. A 20mm will definitely clear.