Every Turbo Owners Dream (besides HP): Wider Wheels!

911nut · 911nut's Garage

I recently sourced wider Speedline inner wheels for my RH's from Jim Dorociak over on Rennlist. I finally got the wheels assembled last night so a trial fit was performed today:

The 965 cannot run as wide a rear wheel as a 930. With the new inners, these wheels will be 10-3/4 inches wide.

Tomorrow I'll have the tires (295-18-30's) installed are re-check clearances.
Finally I'm beginning to look forward to spring!

ej911 · 03-01-2012, 09:23 PM

Cargraphic makes wheels for the 965 in this size:

11.0x18 offset 62 with 295/30R18

Cargraphic | The classic and sportscar specialists | for Porsche - P65 - 1994 - Wheels - Racing 18" Tuning

911nut · 911nut's Garage

With what I now have I've only got 6 mm of clearance between the wheel lip and the trailing arm. Eleven inchers would eat that up and then some.

slow&rusty · 03-02-2012, 04:54 AM

So Paul are these rears considered 10.5" (rear width). How long is the build time?
Regards - Yasin

911nut · 911nut's Garage

Quote:

Originally Posted by slow&rusty

So Paul are these rears considered 10.5" (rear width). How long is the build time?
Regards - Yasin

They are actually 10-3/4 all built up, lip to lip. I assembled them myself with the inners sourced from Jim. Took 6 hours total which includes removing the silicone from the outers and fasteners.

Miguel Antonett · 03-13-2012, 08:12 AM

PM sent.

JFairman · 03-13-2012, 11:05 AM

Wheel width is always measured from the tire bead mounting surface on one side to the other side.
They are never measurd lip to lip if you're looking for the correct dimension rather than a misleading and incorrect higher number.

If you got 10-3/4" lip to lip thats probably a 10" wide wheel.

911nut · 911nut's Garage

Quote:

Originally Posted by JFairman

Wheel width is always measured from the tire bead mounting surface on one side to the other side.
They are never measurd lip to lip if you're looking for the correct dimension rather than a misleading and incorrect higher number.

If you got 10-3/4" lip to lip thats probably a 10" wide wheel.

There are three important features to any wheel: the lip, the bead seat and the well. Lips and bead seats keep the tire in proper position during dynamic operation. The well adds stiffness and is where the disc is pressed into and welded to the rim on a fabricated wheel.
I used to work in wheel manufacturing so when I say lip to lip, I'm referring to the distance between the two vertical surfaces.
So Jim, next time I'll lay a tape across the wheel when I take a picture so I don't get accused of being "misleading".....

911nut · 911nut's Garage

So drove my car to the body shop (first drive on the year). Didn't drive hard enough to be able to comment on any performance improvements but the wheel/tire combination looks good

I don't think there's any way a 315-30-18 tire will fit without hitting the trailing arm. Over on Rennlist there's those that either claim to have fitted 11 inch wide wheels or are in the process of doing so. I'm not sure how that's going to work out as I only have 6 mm clearance from the curl of the lip to the the trailing arm and wouldn't want to get any closer. As it is the curl to curl width of the wheel is 12 inches. This could possibly be the limit.

ej911 · 03-25-2012, 12:07 AM

here are some 9 and 11 inch wheels. ccw lm5 i believe. this car was over on Rennlist in the 964 section.

911nut · 911nut's Garage

That owner claims that he has 4 mm clearance from the curl to the trailing arm. With my 10-3/4" I have 5 mm. Are those really 11's? I'm not a big believer.

moacur · 03-25-2012, 03:21 PM

uhmmmm... yeah Paul, I'm just saying they're 11's when they're not

drmatera · 03-25-2012, 03:39 PM

my rears are 11" and I swear it could go another inch wider with no issue....

moacur · 03-25-2012, 04:30 PM

We're talking about a 964 turbo though which has some restrictions. The problem is that everyone has tried it with speedlines which has a different crushring. I maybe could have gone 11.5" with these wheels with the right amout of camber and the right tire. Everyone said it couldn't be done, even with me showing photos of 11" RH's and 11"s BBS LM's on a 964T with stock trailing arms.

My 11's fit very well. I will say that I do run ALOT smaller tire then him. I'm running a 285/30 Hankook V12(which runs small) on my 11". With bigger tires, there could be an issue, depending on what tire brand you run. With the V12's you could probably run a 295 or 315 but I'm not a big tire guy

drmatera · 03-25-2012, 04:32 PM

ahh, 964 sorry

911nut · 911nut's Garage

Quote:

Originally Posted by moacur

uhmmmm... yeah Paul, I'm just saying they're 11's when they're not

You have stated that you have 4 mm clearance from wheel lip to trailing arm, whereas I have 5 mm. Your wheels do not appear to hang out of the wheelwell and neither do mine. So where is the extra width?
All I can say is that I could not fit a wheel that is another 1/4 inch wider on my car without altering the laws of physics (two objects cannot occupy the same space at the same time). So the only plausible explanation is that you are confused about how to measure them.

empire0007 · empire0007's Garage

Very nice, i have the same wheels on my car with 12" in back and 10" in front

Quote:

Originally Posted by ej911

here are some 9 and 11 inch wheels. ccw lm5 i believe. this car was over on Rennlist in the 964 section.

moacur · 08:43 AM

Deleted

moacur · 06:14 PM

I wrote a reply and am not sure what happened to it and glad it didn't show up

. This is a quote from Tuner1 who ran more then one set of 11's on his 965 " Regarding the rear, if you have the OE-spec 18x10" ET61 wheels, the inner barrel is more than 0.5" (12.Xmm) away from the trailing arm. It might only be ~15mm away, but that is enough clearance to fit an 11" wheel with a few MMs to spare. In terms of clearance to the outside of the fender, it does depend on the model/brand of tire you choose, how much camber you run and the symmetry of the body/fenders". He also stated with his 11's he had 4mm of clearance also. Only thing I can think of is that the crushring that speedlines use must space the wheel a few mm?

Didn't mean to start anything in this thread.. Just got thrown off by Pauls comment. It's all good. Let's move along. Back to Pauls cool new wheels

DohertyCM · DohertyCM's Garage

18" Turbo twist wheels. 8 x 18 et 50, Part #996.362.136.01 and 11x18 et 45, Part #996.362.142.01

I have 315/30-18 on the rear wheels.. and I have spacers on the rear that are slightly bigger than stock and spacers on the front...(dont know if it came with spacers in the front)