I have 15 pics of these on my 85, the one Erik posted plus 14 more, they are stored on Picassa. If I weren't so inept I would upload them, but don't know how.

 

I figured out how to upload. I drove with these on for about 400 miles then got nervous about driving with them on the street, since they are not DOT legal.

 

It seems the hoosiers angle back more than other 265 tires I have seen on a 10" wheel. I can also see two distinct rub marks on the top of the underside of the fender lip in one picture. And on the driver's side, it looks like the lip has been ever so slightly pulled back right at the top. This is exactly the place where my 8.5" ET52 235/40-18 tire smacked the fender during a "violent" maneuver.

Dan
'91 928GT S/C 475hp/460lb.ft

 

Mark, what are you talking about? I didn't see anyone disagree that your setup works. The OP was asking whether 10" ET64 wheels would fit up front. Not everyone wants to spend $$$ on custom 2 or 3-piece wheels.

Dan
'91 928GT S/C 475hp/460lb.ft

 

Hi

Just out of interest...are you allowed to run full slick tyres on the street in the U.S ?

In the UK that would get you fined and points on your licence for "bald tyres" lol...

All the best Brett

 

I was investigating my car few hours ago and I cannot see how it is possible to put 10" wide ET65 wheels to front axle of it.... (and cover everything with a fender)

My current front wheels 8" ET50 are exactly on the fenders edge, but ofcourse inside there is a LOT of space. So, like Mark has written few times now I do need more backspace to make the 10" wide wheels fit.

So, to answer my original question by myself, I would need at least ET75 to keep them inside fender. Or so it seems.

I cannot test fit the wheels I found because they are in another country, that is a problem.

Since I figured out, that the 10" ET65 wheel will go 10mm more out than my current setup, I will put 10mm spacer under them and then see if I can pull my fender like Mark has done and then see if I like the look or not. Otherwise I have to forget Porsche wheels. (or just try to be happy with current ones)

But I would like to see a pictures also of the NeverLateInMyNineTwoEight's car, since he's got also those ET65 10" wheels installed. Can you post few pictures? (you can also sen me an email if you like)

Thanks for your advices!

 

Maybe it will be easier to read in bold:

DOT = Department Of Transportation

Last time I checked it wasn't legal to go 208mph in the UK either

 

Mark says 9-10" work and so it seems. Simple problem is that ET needs to be so large its impossible to find any suitable wheel cheaply. This is and probably always will remain end result of search for most of us who can't justify spending $$$$ to get 1-2" wider wheels. Even most 8" and 8.5" options have 10-15mm too small ET and its impossible to use as wide tire as wheels would normally allow without serious fender rolling.

 

What I am trying to find is 11" 2 piece BBS wheels. Obviously 10" is easy to find, that is what I have. I have Sports Design Wheels, running 9" fronts like Gary which work well, the OP may find that an interesting prospect. I may also buy a set of Sports Classic 11 Wheels. Again basically you can have what ever front widths you like. There is nothing stopping you using a 10" front with this style of wheel. They would have an offset of 82 mm. Gary's and my 9" front wheels have an offset of 69.05 mm.

Greg

 

The wheel's on Rick's car cost $50, keep an eye on eBay, they show up.

 

10" ET65? In my opinion they come way too far out from fender to be usable. If my math is correct they are same thing as 8" ET39. As Tommi says, 8" ET50 is too little. Whats point in having 10" wheels if you can't use 245-255 rubber even on 8" ET50 setup as they will rub? Tommi could easily put 255 to his current wheels if 10" ET65 would not cause problems.

So far no one has explained why 10" ET65 would be any different than 8" ET39. When you say 10" works you are saying 8" should work also. It simply does not. Something does not add up in here. Its that simple. If you say these 10" with way under 80mm ET wheels will not rub with 275+ tyres I simply can't believe it when suspension is set to around 160-170mm height and alignment is set to factory values and not to max angle for track use. If 245ish is widest rubber which can be used with these even with rolling I'd rather use 8" ET60 for it. 10" with too narror tire on it doesn't offer any advantage. This pic on its own shows where problem is.



Front is probably at stock 180-190mm height or even higher unlike most 928 where suspension is set lower than stock so that fender is at tires top level. Many common aftermarket 8" ET50-52 and 8.5" ET54-56 wheels like single piece Speedline copies Keskin KT2 and Veloce 3.6 look the same. Front wheel is like separate not integrated part badly sticking out from fender and tires have to be narrower than what can be easily mounted to these wheels not ro rub. This is totally different than ET80+ setup Mark is taking about. Cheap orice will not help them fit in.

 

I was able to drive my car first time this year today....what a nice machine it is, didn't remember how nice the 928 is to drive. Now with urethane bushings on a-arms and solid rack bushes added..... With MSDS headers, modified torque converter, A/T valve body kit and ProMAX chips. Feels nice, but I could live with 200 more horsepower.

But, to get back to the topic... I measured front end height after the drive and it is now approx 145mm and I really love the look now!.. and my current wheels does not rub anywhere! So 8" ET50 can be used, but I still don't know about the 10" ET65's.... I didn't have time to try the Mark's fender pulling trick, maybe tomorrow, but I still think it is the only way to use those wheels in my car. And I still don't know which tire (255 vs 265) I would use....

There is no explaining about 10" ET65 vs 8" ET39, because it is equal either way when considering outer clearance.

Yes, I could put 255's to 8" wheels, but I won't because they look very stupid. Even 245 tire requires 9" wheel if it was going to be put in my car.

 

Tommi, why are you so set on 10"? 9"s are good and with none of the problems, I take it you don't drive the car in winter or in bad weather. The wheels you have on now have basically the incorrect or not specified offsets. They make the car quite darty, what I mean by that is that they tend to steer the car and not the driver due to the positive scrub radius you have created by using these wheels.

On a flat and smooth surface the problem is no where near as bad. Say on a track no problems although it will be different and some racecars are setup that way. However the axis where the tyre turns will not be correct with offsets like that. So you are probably losing some cornering adhesion and most likely scrubbing your tyres too.

Also as I suggested if you are so dead set on 10"s why not just use the two types available from Porsche, with the 82 mm offset. (Sports Classic 11 and Sports Design) There will not be any issues with the outside of the guard, most likely still need rolling but that is no big deal. Run a 265 on the front (it will be wider because it is on a 10") and then a 295 on the rear. Should preform well.

Where in Sweden are you? I stayed there quite a bit years ago, near Heby which is near Sala if you know it.

Greg

 

The width numbers 255,225,275 is the max width of the sidewall bulge(section) as measured on a rim however the rim width is selected by the tire maker and there is no standard. Tread width varies greatly from brand to brand as well. The HOOSIER Tires in Rick's photo show rubbing wear especially the right front as part of the HOOSIER is worn away. Technically that would be illegal in POC racing as ANY rubbing is not allowed. I do know that if you spin out and are going backwards and happen to be at full lock a 235 on a 7.5x 17 can tear the front fender lip Been there done that .

 

+1. That is what happened to me one time, but with 8.5"x18 ET52.

Dan
'91 928GT S/C 475hp/460lb.ft