[flash]

lol - welcome to the club - we're having jackets made next week

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[BeBe]

A D1R clothing line would be nice. Where else could I find anything with a 968 on it?

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[flash]

hmmm - i think i need to do that

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[tamathumper]

Has anybody just pulled together a "trade-off" recommendation? Assuming 17" is a nice trade-off between filling the wheel wells and not overwhelming the components, and that Sumitomo HTR-Z III tires are available in that size, what would the other middle-of-the road measurements be?



Wheel width, offset, and weight being the major three, I assume?

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[Scott Collins]

I have the Boxter "twist" rims - I'll have to check the specs and bounce back tomorrow.

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[robadams56]

I would still like to find a good set of 17" 10-spoke alloys for everyday use if anyone knows of any for sale. Will keep my 16s for concours.

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[rxter]

Just when i was ready to jump back i to tje 18" ocean I read this. I got so excited with my mazda's. Ew found grip that i forgot about weight, tramlining, and component stress.



The main thing i like about this car is the nimble handling. All of the cars that i really enjoy driving share that characteristic. The NA MX5, 3rd gen MR2, the s2000, and even my RX8 to an extent. Problem with each of those cars is that they are gutless. The 968 with 16s, the grippiest tires available, and bob's sc kit should do the trick.

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[AJG]

[quote name='flash' timestamp='1333051246' post='124077']

there are a few things involved, weight is included, as the physics there come into play and add a LOT of wear and tear on the components. tire adhesion does too. the stickier the tire, the more load. things have only gotten worse as tires have gotten better

[/quote]

Bob I believe your tyres on the blue car still have those spikes of rubber sticking out of them, you know those things on new tyres before they go on the road and get worn off.

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[tamathumper]

Just to answer the question I posed above for future use, I eventually put together my own middle-of-the-road definition. There are no absolutes, so I'll generalize.



The stock wheels didn't vary much in width, going from 7 in the front to at most 9 in the rear, and generally 1.5 inches wider in the back than the front, so I tried to honor that difference. A width of 7 in the front would mean 8 or 8.5 in the rear. I didn't bother considering the same width front and back as Porsche did once with snow tires, as I don't intend to drive in the snow. That would make front-to-back tire rotation a possibility, though.



The offsets were most often between 52 and 65, (again only higher at 68 for winter wheels), and the majority of wheels you'll find in the aftermarket are offset 55 so that's not too much of a problem to deal with. Lots of the Boxster and Cayman wheels are offset 48, which may require a 7mm spacer on the front, and which arguably requires longer (52mm) wheel studs and a (recommended anyway) swap to steel lug nuts. I believe H&R Trak+ DRS is the series of spacer that includes the studs. Their DR and other series use bolts or come without the necessary hardware.



Compared to 18's and above, 17's are much harder to find unless you want a set of Turbo Twists (no thank you) or something off a Cayenne that looks vaguely like the original 924 Arachnids (ugh). Finding a good set, at a good price, has taken months, but is worth it if you want to modernize the look of the car just a little and you don't want to overtax your handling bits. The C.U.P. 2's are quite common, but the price ranges tremendously and many of them are beat, so buyer beware.



Definitely read the comments and ask a lot of questions about wheels before purchasing online. At least 75% of wheel advertisements do not include the offsets and you will have to ask (and most likely have to describe how to find the offset to the seller). At least 50% of the wheel advertisements incorrectly list the part number or the actual diameter of the wheel, or the heading will list one size and the description will list another. And this is from sellers who specialize in wheels!

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[tamathumper]

Here is a list of standard offsets, and tires that were recommended on the forum (and their year of recommendation).



Standard wheels



Early C2 5-Spoke

7 x 16 ET55 944.362.114.00

8 x 16 ET52 944.362.116.00



-or Cup Replica

7.5 x 17 ET65 965.362.124.05

9 x 17 ET55 965.362.128.00



-or later

7.5 x 17 ET65 993.362.124.05

9 x 17 ET55 993.362.128.00



Winter use

8 x 17 ET52 965.362.126.01

9.5 x 17 ET68 965.362.128.05



-or later

8 x 17 ET52 993.362.126.00



Turbo S standard wheel

8 x 18 ET52 965.362.136.01 Weight (25.38 lbs)

10 x 18 ET61 965.362.140.01 Weight (26.75 lbs)



Tire recommendations:

Michelin Pilot (2007)

Bridgestone S-02 (2007)

Bridgestone RE-750 (2007)

Toyo T1R (2008)

Bridgestone Potenza RE050A Pole Position (2010)

Sumitomo HTR Z III (2011)

Dunlop Direzza (2011)

Goodyear F1 DSG3 (2011)

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[AJG]

They've stopped the Goodyear DSG3's in the UK but imports can be had, again difficult to get the rear 9 x17's, shame 'cause its a good tyre.

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[tamathumper]

[quote name='robadams56' timestamp='1333305747' post='124297']

I would still like to find a good set of 17" 10-spoke alloys for everyday use if anyone knows of any for sale. Will keep my 16s for concours.

[/quote]

Offsets look good - http://www.ebay.com/itm/17-PORSCHE-OEM-W...06&vxp=mtr



They come up pretty regularly on eBay.

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[craigawoodman]

From memory, a smaller offset number will stick out further in the guard - so a larger offset number (i.e. distance from the rim centre line to the mounting face) means that the rim will effectively be closer to the strut. THere is a good wheel off-set calculator on-line somewhere.



The issue is to find a rim that is around the OE 65mm offset.



I am running 10" rear rims with 285/35R18 tyres plus a 21mm spacer (they just rub on full compression, so an 18mm spacer would be better). So technically, you should be able to run up to an 11" rim - providing it has the right offset.

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[White968]

My 968 had the best feel and ride with the stock 16". I love the way my 18" look on the car but the ride is

compromised. <img src="/forum/images/smilies/968/beer.gif" class="smilie" alt="" />

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[SILVY968]

White968,

Agree 100%. just have to steer around every little thing on the roads. PITA.

This must be similar to what women say about shoes that look fantastic but hurt.

Brian

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[steve g]

I've read this thread hoping to find the answer to my situation - I'm still building my 968 into dedicated DE/PCA Club Race Class.



My understanding is that the maximum legal wheel size is plus 1 inch from stock width which means 8.5 on front and 10.0 on rear.



Is anyone currently running those size wheels - if yes - what size tires ?



I 'had' a set of Porsche 8 & 10 x 18 in MY02 5 spoke wheels but those wheels were recently damaged so now I am in the market for new set and am considering going up that extra half inch.



The top wheels choice on my list are the CCW Classics.

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[flash]

i don't know about 8.5, but i've seen 8 on the front (i have 9)



especially for racing, weight should be the first consideration.



as for tire size, on the rear a 285/30 fits nicely (that's what i have on my 10s) on the front, i have a 255/35, but again i have a 9. that might roll a bit on an 8, but maybe not on an 8.5.

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[Fox944]

[quote name='craigawoodman' timestamp='1343036583' post='129785']From memory, a smaller offset number will stick out further in the guard - so a larger offset number (i.e. distance from the rim centre line to the mounting face) means that the rim will effectively be closer to the strut. THere is a good wheel off-set calculator on-line somewhere.



The issue is to find a rim that is around the OE 65mm offset.



I am running 10" rear rims with 285/35R18 tyres plus a 21mm spacer (they just rub on full compression, so an 18mm spacer would be better). So technically, you should be able to run up to an 11" rim - providing it has the right offset.[/quote]



You are still going to get some rub on full compression with a 65MM offset. I had OEM technology hollow spoke wheels. Optional for the narrow body 993. Rear wheel was 10 X 18 ET65. Was originally running 285/35 tires. Would rub under full compression.

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[Fox944]

[quote name='steve g' timestamp='1351967401' post='134376']I've read this thread hoping to find the answer to my situation - I'm still building my 968 into dedicated DE/PCA Club Race Class.



My understanding is that the maximum legal wheel size is plus 1 inch from stock width which means 8.5 on front and 10.0 on rear.



Is anyone currently running those size wheels - if yes - what size tires ?



I 'had' a set of Porsche 8 & 10 x 18 in MY02 5 spoke wheels but those wheels were recently damaged so now I am in the market for new set and am considering going up that extra half inch.



The top wheels choice on my list are the CCW Classics.[/quote]



I ran 8 X 18 ET52 & 10 x 18 ET65 wheels on my car. Tire sizes were 225/40 & 285/35 which I later swapped to a 265/35 tire. Went with stickier pilot cups to replace the pilot sports I had on there. Didn't really lose any grip as the tire's were much stickier then the pilot sports I had on previously and also lighter. 285/35 works, but you get a slight rub under full compression as mentioned above.



The factory turbo s wheels and tires were 8 X 18 ET52 & 10 X 18 ET61 equipped with 235/40 and 265/35.



Lastly, the 18" narrow body hollow spokes (really tuff to find wheel) front wheels are about 3.5lbs lighter then the factory C2 Turbo 17" wheel and 2.5lbs lighter then the factory 993 Cup 17" wheel. The rear wheel is about 3lbs lighter then the C2 Turbo 17" wheel and 1lbs heavier then the 993 Cup 17" rear wheel. Roughly 5lbs and 4lbs lighter front/rear then the factory Turbo S speed lines.

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[steve g]

Would like to hear from folks who track their cars...DE or Club Racing...



I am now considering the following setups for my 968 DE car non M030 but with Moton Clubsports

My car has coilovers so taking your collective advice on rear size 285 vs 265.



Tires - 225 fronts and 265 rears

Option #1 - Michelin Pilot Sport Cups $1296

Option #2 - Yoko Advan AO48 - $996 (2007 production dates)

Option #3 - Toyo Proxis R888 - $1092



Wheels - 8.5 and 10.0 x 18

Will I need spacers with either setup ?

Option #1 - Enkei NT03 Offsets Front 50 and Rear 60 ($1350/silver)

Option #2 - OZ Alleggerita HLT Front 53 and Rear 65 ($1636/blue or $1716/gold)

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