Randy V

Any pics of 'em, Jim? Do they look the same as the hollow-spokes, i.e. the spoke has that same 'flat' profile?

What's the weight difference?

Thanks!

Kevin in Atlanta

Randy there is set in the Rennlist classified. But, they are black.

Randy V

Thanks, Tib! Sounds interesting, but I don't think black is gonna work for me.

Jim bailey - 928 International

Randy just click into our store and search for "turbo" ... It shows wheels and Kuhmo tires as a package besides you may find other things you need !

Ketchmi

Hey Jim, you don't need engineering studies to know that when a lot of people complain about how easy the aftermarket ones are to bend and that they all usually end up getting a set of factory wheels, or that the simple fact that the factory wheels sell for more USED than the new aftermarket, there is something to that. If the aftermarket wheels were as strong and held up as well, the price for used factory pieces wouldn't be at a premium, would it?

Carl, I would base the tire pressures on the wear patterns. Different tires are going to require different pressures for proper wear. I use higher pressures than most people to maximize stability and minimize tire wear. I run about 36 front and 38 rear as a starting point and work from there.

FBIII, yes you will create an understeer situation by increasing the rear grip more than the front but usually only at 8/10's or above. Most people drive well within the limits and probably won't even notice the difference. When you start tracking a car, it all becomes evident as you are "riding the line" of traction most of the time. 295 rears and 225 fronts will give significant understeer in these conditions. That's why I usually recommend a 1" width difference in wheels front to rear and 20mm of tire width difference for track use. For street use, no problem.

FBIII

Thanks Dave, I'll have to squirrel that info away.

Randy V

OK, JB. So no guess on what the weight differential is?

Jim bailey - 928 International

I would need to have loose wheels here to weight but as a Guesstimate maybe 10 lbs each.

Randy V

10 pounds lighter per wheel? That's pretty significant.

Randy V

Here ya go Jim - I know you hate to post pics :




They do look very similar to the hollow style.

Jim bailey - 928 International

Porsche states that the hollow spoke saved "around 3 kilos per wheel" ... so quite a bit less than 10 lbs....so much for guesstimates ! Thanks for posting the wheel picture I still prefer the 1,000 words

Ketchmi

I believe they are right at 8# per wheel.

So tell me Jim, what would you rather hold in your hands, the real thing or a silicone enhanced set that look almost like the perfect set but still don't have the quality or feel?

ew928

Don't enhanced sets sag less?

3 kilos of unsprung weight/corner is some nice weight saving.

Don't dare run 18" wheels in NYC. Them potholes are hungry.
Ernest (NYC)

Jim bailey - 928 International

Actually Dave after several exhaustive years of study I found that natural and silicon were both quite pleasant I was less impressed with the saline but even that did not seem to interfere with the overall experience. Besides by the time you find out if they are real or not it does not seem to make much difference in the ultimate outcome Thanks for bringing back many fond memories. But back to the topic of wheels I really do not KNOW which is stronger and it is obvious neither do you. You state..."when a lot of people complain about how easy the aftermarket ones are to bend ..." OK Dave is it not true that nearly all those people had gone from 15-16 inch stock wheels to 17 or 18 inch wheels ! Dave ".. and that they all usually end up getting a set of factory wheels.." And perhaps after ruining one set of wheels they modified their driving style or were simply SOLD that factory wheels are stronger. Dave " or that the simple fact that the factory wheels sell for more USED than the new aftermarket, there is something to that".... OK Dave and an 86 911 can sell for twice what an 86 928 would ,do you see any flaws in this type of "logic" ? ....Dave.." If the aftermarket wheels were as strong and held up as well, the price for used factory pieces wouldn't be at a premium, would it?...." Yes Dave it would partly because of comments like yours. There are some people who buy labels others who assume that more expensive things are better when in fact the only thing you can know for sure is they are more expensive. Like I said I have no idea which is stronger. Seven pounds more or less in unsprung weight in my opinion will make little or no difference for a street car since it is a small percentage of the total unsprung weight.

Ketchmi

Geez Jim, go have a beer.

I do not know which is stronger? It is common knowledge that the aftermarket wheels are softer than the factory ones. I have seen aftermarket ones get bent from hitting a pothole, and not the rim lip either. They were structurally crooked without looking so. Actually several instances of that. I have seen factory wheels bent the same way but only in accidents.

The people I am talking about go from 17" or 18" aftermarket wheels to the factory style that they were copied from and have no more complaints. (But I'm sure that they ALL modified their driving style after getting the factory wheels. Was that your next excuse? C'mon Jim, that one was just without basis. One penalty beer for that one.)

Comparing a 911 vs. a 928 is apples to oranges, comparing aftermarket Twin Turbo wheels to Factory Twin Turbo wheels is more along the line of banana's to banana's at least. Once again, without basis. One more penalty beer.

7 to 8 pounds per corner, not overall. It is noticeable by me (on the street) and probably by more than a few of our customers.

Next time you have a car partially dismantled, disconnect the top of the shock and the sway bar, then weigh the whole brake, hub and control arm assembly's (attached to the frame still of course, they are supported solidly on one side which considerably lessens the active weight.) Then figure out what percentage of that weight is 8 pounds per corner. It's more than noticeable, probably around 10% of the total. (that one is a 6-pack!)