I said it before and i'll say it again. Include an inch of brake clearance at the hub!

How many wheels does it take to make a first run? Can the run consist of the various 17" sizes and offsets?

Can you go into a little more detail on this?

Not sure. It will depend on the construction mether adopted. If 3-piece then we could build any combination. If monoblock we might have to restrict sizes innitially.

I'll start w/ a standard Carrera/RS body/suspension and what I have used and seen used
front
8" is the maximum I've seen and used, ET25 to ET31, the lower ET will need more lip work, I use 8x17 ET25 and I shaved the lips completely off when I had 7x15 ET23.3 and 205/50 tires at extremely low ride height. It came in handy w/ the 8ET25 and 235/40 x17 tires. ET31 8" have less issue at the lip more at the strut housing, friends w/ race SC/Carreras and ETET30 leave the strut dust shield off or at least cut away w/ 245/40 tires

rear
I use 9.5 x17 ET19, currently 255/40 tires but 275/40 in the past, the 275 requires that the passenger side oil line be relocated and the trailing arm bolts/nuts shaved, there is minimal clearance both at the trailing arm and shaved lip, ride height is somewhat compromised

Here is 8x18 ET30 245/35 9.5 x18ET20 285/30
http://forums.pelicanparts.com/uploa...1349104871.jpg

here is 8 ET25 235/40 9.5x17 ET19 275/40
http://forums.pelicanparts.com/uploa...1349105012.jpg

Thanks Bill. That's good info.

I'm thinking it'll be safer for everyone if you go 3-piece, especially if you can do hidden fasteners.

Sure. It's a standard thing for wheel manufacturers, but I'll splain it anyway.

If you put big brakes on a 911 the caliper extends outward past the plane of the hub. So, if the hub of the wheel was a simple flat piece of aluminum you could not bolt the wheel onto the hub.

If you take a standard Fuchs wheel and cut them apart and re-weld them into a 17, you would have this problem if you try to bolt it onto a car with big brakes.

This is alleviated by having a thicker hub flange on the wheel. You could think of it as a spacer except it's actually part of the wheel itself.

On the diagram below it's called caliper overhang.

993 brakes require about .75" or thereabouts.

H

http://forums.pelicanparts.com/uploa...1349129593.gif

Just my 2cents wrt brake clearance all the modern built up wheels I've seen in 911 o/s have squared off brake space which allows for most brake caliper setups, the room comes from the built up nature of the wheels

I use 993RS brakes, there are few larger options, on my 1976 Carrers 3.0 and the same on my 1995 993, the 911 8&9.5 x17 wheels have far more axial clearance than the 8.5 &10 x18 993 wheels

1976 wheels
http://forums.pelicanparts.com/uploa...1349132163.jpg


Clearance 8x17 & 9.5 x17 on 1976 C3, 3 piece
front
http://forums.pelicanparts.com/uploa...1349132529.jpg
rear

http://forums.pelicanparts.com/uploa...1349132546.jpg

clearance 8.5 & 10 x18 on 1995 993, 3 piece w/ hidden bolts
http://forums.pelicanparts.com/uploa...1349132663.jpg
http://forums.pelicanparts.com/uploa...1349132648.jpg

Any idea Paul if this is a "Go"? I need to order wheels at some point in the off season.

Not right now Plavan but it is moving through the works. I hope to know soon.

So the factory is proposing to make 17" wheels using the same process as the current 15" and 16" in the following specs:

7" +49
8" +30
9.5" +19
11" 0

As with the current range adjustments to these offsets would be available as an extra cost option.

Do you see any glaring omissions or any other size/offset we would require?

Prices are not yet set but I imagine they will be in line with the current offering but perhaps 17/16 more. Let's hope that's the case.

As I started all this it seems I may have an obligation to buy the first run. I hope all the enthusiasm shown in this thread proves genuine and I'm not just reading what I want to hear.

Does all this seem realistic?

I need a 10" and 9" in negative offsets, so I'm probably out. I can't fathom spending all that money on wheels that might not fit. :(

I have a question for Pelicans with 930s (or folks running 930 calipers). On a 930 running 9x16 Fuchs if you remove the factory rear spacer can you still mount the 9x16 wheel on the hub with no interference? Or does the back of the wheel hit the caliper with the factory spacer removed?

If the back of the 9x16 Fuchs does hit the turbo caliper with factory spacer removed does anyone know what the minimum spacer width is to allow the 9x16 Fuchs wheel to work with the turbo calipers?

Thanks for the info!

Paul - I would be interested in the 11" and 8" wheels in RSR finish for my project but it will be months before I buy anything. IF Pirelli releases the Corsa Classic P7 in 15" I could go that route but 17" gives a LOT more choices in tires in 315/335 and 245/255 widths..

Scott,

When these calipers are modified for non-930 trailing arms, the fins are typically milled off. So, it's a tight fit with a regular SC/Carrera trailing arm and no spacer. The spacer you'd need is quite thin because it only has to be slightly thicker than the depth of the fins on the caliper "face"

930 rear caliper modification for 911

Too much offset for a stock-body SC/Carrera. I'd need to run 19-21mm spacers both front and rear. Not too enticing for me.

For which sizes? 7&8x17 sure. For 8&9.5x17 no.

Great info. Thanks!

So I guess a 930 using stock unmodified 930 calipers would need a ~5mm spacer to fit the 11x17 et0 wheels on the rear.

Yes, I was talking about the 7 & 8 sizes.