Dieting. Rim Weight? Which is lightest?

[63Rag]

Gentlemen,
What is the lightist rim & wheel combo. I want the most utalitarian set up, road racing combo. Fuch 16", Phone Dial 16", Turbo twist 17", Cup Series 16". Thanks
Wolfy
p.s.
Great cars guys.
I will have pics of project soon.

[zen]

i don't know the specific weights, but generally speaking (especially with stock Porsche rims) the bigger the rim, the heavier. so 15 will be lighter than 16 and so on. this of course varies with material (alloy vs. steel) and production technicque (forged vs. 3-piece).

then you have the trade offs with sidewall height and flex on smaller rims and harsher ride and different (arguable as to whether better or not within the spectrum of sizes) handling characteristics.

16's should be a happy medium if you are looking for a little bit of all worlds.

you may have already known all this, but seeing as i don't know the specifics, i thought i would share what i could. fwiw, i am running 17's and have a spare set of 16's that i may use for autocross or put on my 944T.

[63Rag]

Thanks for response I am leaning toward 16". If anyone has got any other experiance or thoughts on issues input is appreciated.

[NYBugman1972]

If you want to stay porsche (and above 15"), then go with 16" fuchs or the 7-slot "dish" wheels off of 928's, or 944 club sport wheels. They are all forged, so they are light. Keep in mind that the club sports look 99% like the Design 90, but they have little "impressions" at the end of each spoke.

http://www.wheelenhancement.com/ has a lot of wheels to choose from. Lots of forged aftermarket wheels for porsche, but then they may not fit your car, but it's fun to look :)

[Sandeep]

Wheel enhancement .. yummy :silly:

I beleive the 18" 996 5 spoke is supposed to be the lightest of the stock 18" wheels for Porsche.

I'm keeping an eye out on Ebay because these are the wheels I want to replace my current 18" wheels with.

Sandeep

[Alex]

BBS Magnesium.

Mucho $$$$$$

Alex

[Shad Laws]

Hello-

Keep in mind too... rim WIDTH is a big factor.

The wider the rim, the heavier it is (duh).

For example, I have 16x9 Porsche 993 rims on my rear. Especially once a 245/45/16 tire is added onto it, it isn't all that light. Of course, it is pretty danged light for its size... but its size is huge. Just a thought...

I'm contemplating getting some autocross-specific rims. I'm leaning toward 13"-14" Diamond racing wheels, though. I want a smaller diameter to effectively "lower" my 2nd gear ratio :-). Diamond wheels are steel, not aluminum, but if you get their lightweight ones (which are so flimsy that real-world road use isn't recommended), their weight is hard to beat with aluminum!

Take care,

[MattKab]

Porsche 911 Fuchs Forged 16x6 17.0
Porsche 911 Fuchs Forged 16x7 18.0
Porsche 911 Fuchs Forged 16x8 19.0
Porsche 911 Fuchs Forged 16x9 20.0
Porsche 914 6-cylinder 5-bolt (rare) Forged Mg 15x5.5 7.0
Porsche 928CS Forged 16x8 19.0
Porsche 944S2 Cast 16x7 18.7
Porsche 944S2 Cast 16x8 22.0
Porsche 944S2 Spare Tire & Wheel (includes tire weight) Stamped Steel 29.3
Porsche 944 Turbo/951 "Flat Dish" Forged 16x7 18.5
Porsche 944 Turbo/951 "Flat Dish" Forged 16x8 20.0
Porsche 944 Turbo/951 Fuchs Forged 16x7 15.0
Porsche 944 Turbo/951 Fuchs Forged 16x8 16.0
Porsche 944 Turbo/951 "Phone Dial" Cast 16x7 18.5
Porsche 944 Turbo/951 "Phone Dial" Cast 16x8 20.0
Porsche 944 Turbo/951 "Phone Dial" - Optional Cast Mg 16x8 16.1
Porsche 944 Turbo/951 "Phone Dial" - Optional Cast Mg 16x9 16.5
Porsche 944 Turbo S/951S Design 90 "Clubsport" Forged 16x7 18.5
Porsche 944 Turbo S/951S Design 90 "Clubsport" Forged 16x9 20.0
Porsche 968 Cast 17x7.5 20.0
Porsche 968 Cast 17x9 23.0
Porsche 993 Cast 17x7.5 18.0
Porsche 993 Cast 17x9 19.5
Porsche 996 Cast 17x7 19.1
Porsche 996 Cast 17x9 22.3
Porsche 996 Cast 18x8 20.0
Porsche 996 Cast 18x10 23.4
Porsche Boxter Cast 17x7 20.3
Porsche Boxter Cast 17x8.5 22.7
Porsche Club Sports Cast 16x7 19.0
Porsche Club Sports Cast 16x9 21.5
Porsche Cup Cast 18x8 26.2
Porsche Cup Cast 18x10 29.3

Info found at www.audiworld.com

Also,

17x7.5 Cup replicas made by Mille Miglia 23.5
17x7.5 Cup replicas made by Borbet 30.5

Matt

I fancy some of these 996 Kab beasts next :eek:

http://www.thesamba.com/vw/gallery/pix/114610.jpg

[darren]

Loads more info here : http://members.rennlist.org/911pcars/WheelWts.html

darren

[Bruce2]

Originally posted by MattKab

Porsche 911 Fuchs Forged 16x6 17.0
Porsche 911 Fuchs Forged 16x7 18.0
Porsche 911 Fuchs Forged 16x8 19.0
Porsche 911 Fuchs Forged 16x9 20.0
Porsche 914 6-cylinder 5-bolt (rare) Forged Mg 15x5.5 7.0

Porsche 944 Turbo/951 Fuchs Forged 16x7 15.0
Porsche 944 Turbo/951 Fuchs Forged 16x8 16.0


These numbers are way off. There's no way a 6x16 Fuchs weighs 2lbs more than a 7x16 Fuchs from a 944.
A 7x16 911 wheel weighs the same as the 944 version, they are just shaped differently, yet this list says they are 3lbs apart!
The 5.5x15 Mahle is in the 9.5-10 lb range
It looks to me that the guy who created the list simply guessed at the weights:
16x6 17.0
16x7 18.0
16x8 19.0
16x9 20.0

Gee, the width increases by 1", so the weight must increase by 1lb. Where do they get that?

[MattKab]

I noticed that too. I see different info on different sites :mad:

Somewhere I saw Mahle gas burners at 11lb or so.

I'll weigh my rims myself and amend if neccessary.

Matt

[Bruce2]

I think the problem with weight accuracy lies with the scale people use. The most common one to use is a bathroom scale. Very few of them are accurate. And they are more inaccurate at the low end of the scale. They were designed to weigh things in the 120+ lb range, not 12lbs. If you are using a bathroom scale, hold the wheel and stand on the scale. Then put the wheel down and deduct your weight from the combined weight. Better still, hold 2 wheels. Weighing 2 at a time halves the error. 3 or 4 is even better.
Some weights of wheels I have made that are not on your list:
Fuchs 4.5x15 11 lbs
Fuchs 5.5x15 12 lbs
Fuchs 6x15 12.9 lbs
Fuchs 7x15 (early) 12 lbs
Fuchs 7x15 (late) 13 lbs
Fuchs 8x15 14 lbs

Since its a known fact that the lightest wheel ever sold by Porsche is the 5.5x15 Mg Mahle, and the 4.5" Fuchs are 11lbs, the Mahles must be less than 11lbs.

[Bugnutz]

The scale used is a big factor, and yes the common bathroom scales can lie.

FWIW, I just happen to have my wheels here with no tires mounted yet. I weighed them with a Chatillon spring scale (fish-type) which has a range of 30 pounds. I think this thing is pretty accurate.

The Fuchs 951 8x16's measure 14.25 lbs (6.5 Kg) and the 7x16 Fuchs came in at 13 lbs (5.9 Kg). These include the center caps and the valve stems.

Bugnutz.

[DORIGTT]

Check out www.lindseyracing.com. Look in general store and then wheels.

Hope it helps.

[Alex]

I love those P3 17" Fuchs.

Hmmm....makes me think again.

Alex

[Wally]

Originally posted by Bruce2
I think the problem with weight accuracy lies with the scale people use. The most common one to use is a bathroom scale. Very few of them are accurate. Some weights of wheels I have made that are not on your list:

Fuchs 6x15 12.9 lbs



Hi Bruce,
FYI, I have just aquired a (used) laboratory scale with a 0,1 gram accuracy.
Of course I weighted some parts immidiately. My tubeless type 6x15 Fuchs rim (their are two types!) was 5905 gram with tube installed still, but without hub cap. This almost is exactly like the 12,9 lbs you mention!

Also: at the porsche import agency of Pon here, I understood that the 964 RS had the 17" Cup I rims, but they are then forged magnesium ones with hollow spokes. They should be very light, but are also a rare wheel.

Cheers,
Walter

[SteveStromberg]

We have several sets of Mahle Gas burns. Steve

www.ottosvenice.com