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Here's what a typical change from 16" Fuchs to 17s might look like, different wheels or tires would be similar but almost certainly different, it all depends on specifics

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Old 04-20-2018, 04:03 PM
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Well here is mine with the Euro's as I'm getting it clean for tomorrow's Hershey pilgrimage early in the morning!
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Old 04-20-2018, 04:21 PM
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Quote:
Originally Posted by lpsalsaman View Post
Supe's, when I got my Euro's I thought the same as you but then I went middle of road with the 215's instead of the 225's; in order to avoid possible issues with rubbing. Although most have reported no issues with them, I did not wanted to take any changes. My front fenders already had their inner lips rolled a bit so it helped. Anyway good luck and hope to see the ride with the wheels/tires on!
Now I am more interested in fitment. How much negative camber is necessary in order for the 215s to fit?

BTW, it appears there are FEW tire choices in 225. MANY more in 215 and 205.
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Old 04-21-2018, 10:55 AM
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Originally Posted by Superman View Post
Now I am more interested in fitment. How much negative camber is necessary in order for the 215s to fit?

BTW, it appears there are FEW tire choices in 225. MANY more in 215 and 205.
If using 215/45 front I'd use 245/40 rear, here's what it looks like w/ Euromeister 7 & 9 x17 and some randomly chosen tires, fit is good and minimal torque loss, those wheels are heavy though, you'd be gaining torque if they were lighter
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Old 04-21-2018, 03:10 PM
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Thank you Bill, but the table does not 'speak' to me like it does to you. I'm unfamiliar with the abbreviated variables, for example. I'm a simple country boy.

Here is what I think I am hearing: Fatter tires improve traction but rob torque.

I happen to be NOT a fan of underinflating tires. I like tire pressure. Power and mpg are improved, and tire deflection is minimized. At AX, guys tend to use pressures between 35 and 40 psi, and I am in that group.

What I really want to know is, with 7 and 9 Euromeister wheels, at what tire size would I be getting into trouble in terms of rubbing? Another way to ask the question is....how much negative camber would I need with, for instance 215/45x7 and 255/40x9? If you respond, Bill, I would also appreciate your thoughts on camber. This is not a track car, but I want it to be among the most capable of street cars. I'm not going to use this car for long trips. In a word, the thing I like most about these cars is their......obedience. They go, stop and turn very effectively. FYI, I am waiting to get the strut cartridges and rear shocks back from Bilstein, custom valved to Mr. Weiner's specifications. The struts themselves are at Rebel Racing for the welded steering knuckle thing because the car is substantially lowered. 22/29 T-bars.

One more thing. How do the Euromeister wheels compare to stock Fuchs in terms of weight? How much heavier are they?
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Old 04-22-2018, 08:57 AM
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Supes, sorry for the late reply been a bit busy. Anyway to tell you truth when I installed the wheels with the tires I did not had to make any changes to what I already had. The only thing I did was adjusted my height ride on front but I did not do any camber adjustments. Initially due to the height I had to adjust a bit and roll my fenders a little more, although the PO had done so.
I do need to take it in to redo my height and realign it again, it's been a while since I got my Euros (4 years). Anyway I'm sure someone else may have the same set up and will chime with their take.
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Old 04-22-2018, 09:48 AM
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Thank you. Again, for anyone who can advise me, here are some specs:

Front Fender Height: 24.25"
Rear Ride Height: 23.75"

22/29 T Bars

Euromeister 7 and 9 x 17 wheels
215/45x17 and 255/40x17 tires

Will I have rubbing problems? Will I have camber choices?
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Old 04-22-2018, 10:48 AM
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Wow, your ride is lower than mine. Mine is at 25 inch up front and 25 1/2 on back. Standard T bars. I guess this is why you are asking about camber.

Initially I was at 24 1/2 up front and did had some rubbing issues which is why I raised my car up. The back is where it was previously and the 17x9's with the 255's pretty much fills the space, although I want it a bit lower down to 25 or 24 3/4.
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Last edited by lpsalsaman; 04-22-2018 at 11:29 AM..
Old 04-22-2018, 11:11 AM
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Generally speaking, if you look carefully at cars, the front fender has a bigger opening. Wider and taller. The fender lip height is higher on the front than the back. Makes sense, since the rear wheel doesn't move as much as the front.

My ride height might be a bit too low. If necessary, I could raise it. But...I do have stiffer torsion and sway bars, fresh shocks to match them and the Rebel Racing modification to the steering knuckle eliminating bump steer on lowered 911s. It should work. If I need to use substantial negative camber, then so be it.
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Old 04-22-2018, 12:18 PM
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Understood, well hopefully all will go well. Anyway post some pics when you are done with it.
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Old 04-22-2018, 03:24 PM
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Understood, well hopefully all will go well. Anyway post some pics when you are done with it.
She'll be pretty. Mocha. Like this (not my car):

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Old 04-22-2018, 04:14 PM
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Mine has black trim instead of silver, and the headlight trim rings are a sort of 'sable' color. But otherwise, should look like this. This wheel discussion is because I don't like the vertical look of the stock front (16x6) wheels. I need tires anyway, and the Euromeister wheels are darned cheap. I should talk to the Fikse people about their Fuch replicas, but that conversation might cost me $3K.
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Old 04-22-2018, 04:17 PM
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Quote:
Originally Posted by Superman View Post
Thank you. Again, for anyone who can advise me, here are some specs:

Front Fender Height: 24.25"
Rear Ride Height: 23.75"

22/29 T Bars

Euromeister 7 and 9 x 17 wheels
215/45x17 and 255/40x17 tires

Will I have rubbing problems? Will I have camber choices?
here are 2 options, both are compared to 205/55 & 225/50 on Fuchs 7 & 8 x16

option 1: 215/45 & 245/40 x17

note that in this 17 option both front and rear are shorter than the existing 16s, the clearance between tire and fender at both ends is also greater. All around this is an easier fit that the 16s. Also keep in mind that there is considerable variation in tire physical dimensions. Here the 215 actually measures narrower in section width than the representative 205/55 x16, each on a 7, per Bridgestone's specs. The reason is that the /45 series sidewall bulges and flexes less than the /55

option 2: 215/45 & 255/40 x17

option 2 front is unchanged, the 255/40 x17, this tire is ~.1" taller than the 225/50 x16 it is compared to and also has ~3mm less room at the lip, this is generally not an issue. Torque loss is also up from a net loss of ~1.3 lb-ft in v1 to ~6.2 lb-ft in v2
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Old 04-22-2018, 04:18 PM
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Quote:
Originally Posted by Superman View Post
She'll be pretty. Mocha. Like this (not my car):

Nice!
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Old 04-22-2018, 04:45 PM
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Hmmmm....

6.2 lb/ft is potentially significant. Hmmmm...

Thanks, Bill.
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Old 04-24-2018, 08:42 PM
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Quote:
Originally Posted by Superman View Post
Hmmmm....

6.2 lb/ft is potentially significant. Hmmmm...

Thanks, Bill.
Here's another option, 8 & 9.5 x17 Braid w/ 225/45 & 255/40, the lighter wheels make a difference, additionally the Fuchs wheel weights are probably a bit on the low side, evening things up a bit. There may be lighter or heavier tires too. I just choose those partially at random and partially because I use RE71


The reason I don't care so much for 215/45 x17 fronts is it increases understeer. If that's what you want great, but most want to increase overall grip but front more than rear. the shorter sidewalls of the 17s will almost automatically increase overall grip(it does depend on compound too) so going from 205/55 & 225/50 x16 to 215/45 & 245/40 slightly increases under steer, 215/45 & 255/40 more so, 225/45 & 245/40 stays about as neutral and 225/45 7 255/40 again slight increase in under steer, wheels also affect this the wider to the spec limit increases grip at that end.

Take 964 Cup as the ultimate example of grip w/ 17s, they used 235/40 on 8 & 255/40 on 9.5, these sizes could also be used on a 911 but the front fitment will require some effort to accomplish and need just the right wheel ET.
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Old 04-25-2018, 04:19 AM
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Euro 17s

My '83 with 215/45x17 and 245/40x17 on Euromeister 7s and 9s.

As delivered (from our host), the rims were flawless, well packaged and ran straight and true.

No clearance problems at all without rolling the fenders.

Old 05-03-2018, 09:26 AM
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Euromeister 17x7&9
Re-71r 215/45 255/40
87 Carrera 3.2

Car is lowered.

These wheels are definitely heavy compared to the Fuchs.

No rubbing on street use but had to re-roll fenders more agressively after autocross.

Very little understeer at AX.






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Old 05-03-2018, 10:22 AM
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My 930 with 7x17 and 9x17 Euros. The car is only a weekend warrior; no track days for this car.



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Old 05-03-2018, 07:08 PM
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Many thanks to Dr. Verburg for his help in this thread and literally thousands of others over the years. Bill, I still don't fully understand the math and tradeoffs in wheel/tire decisions but I did pick up on the idea that a wider front tire would improve traction but at the expense of torque. And so....I think I am settling in toward a final decision and I just want to hear your thoughts, and those of my other Pelicanhead friends:

I am still thinking of the 17 x 7/9 Euromeisters with at least 215/45 and 245/40 tires. If I thought they would fit, I would be tempted to use 225 in the front. Is this a good combo? Is the 225 a bad idea? Will the rear tires have the proper overall diameter for my speedometer?
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Old 05-13-2018, 08:52 AM
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