A few wheel weights - Printable Version
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A few wheel weights - parptarf - 08-25-2014
So when fixing my parking brake I decided to weigh my big and wide rear wheels. Some say they are too big and wide so they weigh too much. I thought I'd test this out.
OZ Racing Alleggerita 10x18" w/ Michelin Pilot Sport Cup 295/30 = 19.5kg
OEM 993 Cup (Cup II) 8x17 w StarComfort 235/45 = 21.5kg
Design90 8x16" w/ Goodyear studded winter tires 205/55 = 20kg
So this rear wheel with the wide tires on it are actually lighter than my small D90 winterwheels. It should be interesting seeing what these will weigh with 265/35 MS Pilot Sport 2 tires on them.
A few wheel weights - ds968 - 08-25-2014
Damn, for a second I thought the weights were in lbs and was vey impressed...only to notice ( after another sip of coffee ) that its in kg .
Ugh.
A few wheel weights - flash - 08-25-2014
i've never seen the 993 Cup in an 8. what is the part number for that?
A few wheel weights - parptarf - 08-25-2014
Might not be for a 993(Just what someone told me there are for), though they are original C up 2
I'll find the part number when I get home.
A few wheel weights - flash - 08-25-2014
the name of the wheel is "993 Cup" for a reason. the wheel was designed for the 993. there are other widths and offsets for the 968, but i've not seen an 8 on anything yet. it would be cool though, as i would love to stick an 8 on the front of the white car.
if they are original though, i'm betting they are a 7.5" up front, and a 9" in the rear, which is what i have on the white car now.
let us know if you find it to be an 8. i'd love to get a pair.
A few wheel weights - banditsc - 08-25-2014
There is a 17x8 rim, it's a winter wheel, but it's intended for the 911, it's offset is 70mm. 99336212601
A few wheel weights - flash - 08-25-2014
lol - i'm getting old. i posted that part number a long time ago on the "wheels that came on our car" thread
looks like i need to go shopping
A few wheel weights - parptarf - 08-25-2014
Sounds about right banditsc, the offset looks absolutely gross on the 968, even with a massive 15mm spacer on.
Not to mention the horrible tires they have on them. Glad I only used them for a brief week. <img src="/forum/images/smilies/968/biggrin.png" class="smilie" alt="" />
Though, a set of backup wheels is always nice to have.
A few wheel weights - flash - 08-25-2014
if i find them, and i decide to go that route, i'll pin and weld a spacer on the rear, remove the material i can for weight, and then bore out the holes back to the correct thickness.
A few wheel weights - parptarf - 08-25-2014
[quote name='flash' timestamp='1408981729' post='161555']
if i find them, and i decide to go that route, i'll pin and weld a spacer on the rear, remove the material i can for weight, and then bore out the holes back to the correct thickness.
[/quote]
I'd definitely do that. ET70 on an 8" wheel doesn't look too good.
A few wheel weights - flash - 08-25-2014
lol - no. not even sure it would fit. wouldn't be hard to modify though. i'd probably push it out 20mm. maybe just longer studs would eliminate the need for the boring, and would be safer. i'll have to look at that. i'd definitely weld the spacer though, and remove a lot of material to lighten it up.
a lot of work for 1/2", but it's the ability to go 1 tire size wider up front without wallowing.
A few wheel weights - parptarf - 08-25-2014
Should look good when it's done. What tire size would you use on the 8" wheel?
A few wheel weights - flash - 08-25-2014
probably a 245-40, so 2 sizes up and a profile size down
A few wheel weights - parptarf - 08-25-2014
I'm thinking about putting a wider tire on the front when I change the tires on my Alleggeritas.
I'm also gonna change out those 295 sections I have at the back, I don't really need that with.
A few wheel weights - flash - 08-25-2014
yeah - i really wish porsche hadn't followed the 911 model when they set up our wheels. a 50/50 car should have the same size wheels all around, especially with the power level of our car. somewhere along the line designers got it in their head that wider was better. it increases frictional drag, wind resistance, and rotational mass, with little to no benefit to offset it.
A few wheel weights - parptarf - 08-25-2014
So running, say a 8x18" with a 235/40 and 10x18" with 265/35 would be better than 225/40 and 295/30?
A few wheel weights - flash - 08-25-2014
oh yeah. you'd lose a lot of understeer, and some rear rotational mass.
A few wheel weights - parptarf - 08-25-2014
235/40 tire wouldn't have a too large diameter, right?
A few wheel weights - flash - 08-25-2014
the O.D. is actually a bit small (24.5 vs 25" of stock)
8" rim is the minimum for that size tire.
make sure it's an 8" rim though, and not the stock 7.5"
A few wheel weights - Bulti - 08-25-2014
"8" rim is the minimum for that size tire."
I got some info here from a tire webshop stating that even on an 7,5 a 235 would be ok. Not ideal, but ok.
For the 8" you can fit anything from 215 to 245.