Wheel Offsets for 2.8 RSR and Braid BZ Wheels 9 and 11 x 15

[ducatithunder]

Hello All..

So I am going to be ordering my wheels for my RSR build here soon. Im looking at the Braid BZ in 9 and 11 by 15 inch. Look like pretty good wheels for the price and fairly light weight. What are you guys with rsr clones running for offsets? My build is based on a 86 Carrera and suspension with steel RSR flares from Mark Darby over at RS 911 in the UK. Will have a 3.6L 993 power plant and eventually 930 turbo brakes. Will be running a set of custom cut Avons slicks from Kraus racing with a 25inch rear dia tire and 24.5 inch front. Ive asked a few guys and got 9et14 thru 9et17 for the front and 11et-8 for the rear. Others have said 9et-3 and 11et-27 and these seem to be Braids standard offset for the 911 RSR sizes. Really dont want to have to run a spacer more then what’s already on the hubs now. Thanks Guys!

[jameshtaylor]

Just ordered some Braids for my 74 with their RSR 49mm offset. But I don't have flares and am running much smaller wheels and tires, not relevant to your situation. If you have a tire and a wheel in your car now with the flares in place, you can use this website to compute the offset you need. http://www.rimsntires.com/specs.jsp This works well, but it can only tell you how to change from a baseline case.

[ducatithunder]

Thanks ... Yep they look like a great wheel. Im curious what others are running with rsr flares and 15 inch wheels. I have my flares but dont want to weld them on incase I have to cheat a little to get the tires and wheels to fit. Fitment looks great so far. I dont want to order the wrong offset and get stuck with the wheels or have to buy and return until Im happy. Braid has been somewhat helpful but they seem to think that something other then the standard offsets of -3 and -27 would work better.

[uptheorg]

If you are building a replica, you don't really need to stick to 15" wheels -- especially with backdated bodywork. My car was backdated to 1973 RSR from a 1984 Turbo-look carrera, so the original factory fenders didn't need modification. I just got my Lindsey Racing P2's (9x11x17) last week, so I don't have any photos yet, but I will say they don't look too large, although purists will disagree. I believe the 15" wheels will be difficult to find rubber for. As far as offsets and spacers, the car comes with 28mm spacers on the rear which I removed and had Lindsey build a deeper rim. I am running the rears with no spacers and they fit perfectly. I don't know the offset, but if you work with Mike Lindsey, he is very knowledgeable and will give you the right setup.

[C.Plavan]

Braid will soon be making 17's. Which not period correct, I would like some other race rubber to use on my car other than Hoosiers. Plus, Fuchs are getting old. I found a crack on one of my 15x8's this year.

[YTNUKLR]

This may help you calculate what offsets will work for you:

http://www.1010tires.com/wheeloffsetcalculator.asp

With an RSR/930 body car, no spacers, and standard 911 hubs/suspension, the factory 73RSR offsets are very close to what you would want: 9"et+3, 11"et(-)27. The Braid 15" RSR changed it slightly on the front: 9"et(-)3, 11"et(-)27.

Here's a rough standard that should be pretty safe :
-for the tightest inner clearance in front on a 9", you could run a 9"et+18 with no spacer. For the tightest outer clearance in front on a 9", 9"et(-)5.
-for the tightest inner clearance rear on 11", you could run a 11"et+10 with no spacer. For the tightest outer clearance in rear on 11", 11"et(-)32.

With long studs and spacers you can run anything more positive offset

This should get you going with the calculator to play around and see how it works,