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Use 15mm spacer
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OK...I have 19" 997 Sport Designs....they are 19x11 et 67 and 19x8 et57....I used a 15mm spacer on the front making them 19x8 and et42....those are almost exactly the 996 GT3 specs but in 19s...No rubbing and they fir INSIDE the fenders front and rear....
Leading evidence: 'Use 15mm spacer' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run narrow body wheels like the sport technos' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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The 17mm are used for the wide-body cars when running narrow body wheels like the sport technos.
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Suggestion
The 17mm are used for the wide-body cars when running narrow body wheels like the sport technos.
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Suggestion
If I was to order a custom offset wheel so I didn't have to have to run spacers I would get the following:
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OK...I have 19" 997 Sport Designs....they are 19x11 et 67 and 19x8 et57....I used a 15mm spacer on the front making them 19x8 and et42....those are almost exactly the 996 GT3 specs but in 19s...No rubbing and they fir INSIDE the fenders front and rear....
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looking at 19/8.5 & 19/11 for nb 996. Offset 57f/67r. tires would be 235 & 295's . Looking to wisdom of board to see if these wheels would align with fenders and not stick ot. Thanks. JW
The Front wheels: The 8.5" with 57mm offset will have 13mm less clearence on the inner part of the wheel and the outer side will RETRACT by 1mm compared to 8" with 50mm offset.
The Rear wheels: The 11" with 67mm offset will have 15mm less clearence on the inner part of the wheel and the outer side will EXTEND by 11mm compared to 10" with 65mm offset.
They would not stick out too far. However, I am not certain if they won't rub on the inside. I am "guessing" that they will not rub, but maybe someone else here can confirm this.
Tim.....Why would he have a 8.5" rim with an offset of 50 as comparison? Don't you mean 8"???
FYI....your math is correct but the 8.5et50 has got to be a typo.
Well, your factory offset on 8" and 10" wheels are 50 and 65 respectively. Personally I find that about 7mm too "in". I added spacers to my 996CAB to get another 5mm dialed out of my wheels. I went with the 5mm spacers since the Factory Porsche spacers come in 5mm and 17mm. The 17mm are used for the wide-body cars when running narrow body wheels like the sport technos.
If I was to order a custom offset wheel so I didn't have to have to run spacers I would get the following:
8.5" et40 for the front
11" et63 for the rear
Those are the EXACT sizes of the wheels on my GT3 and IMHO are the perfect size wheel for accomodating 235-245 rubber in the front and 295-315 rubber in the rear as well as filling out the wheel well properly and don't look to far "in" yet don't sit outside the well.
However, if you wanted to stay 8" and 10" I would order the following:
8" with an offset between 40-43.
10" with an offeset between 55-58.
Dell, My Champion RG5's (18") on my C2 are in the GT3 sizes and offsets you mention above. I am getting ready to order new rubber for the car and I was going to go with 245f/295r. However, if 315's will fit I may wedge those on the car.
Are you sure that 315/30-18's will work on a NB 996?
We just had this long discussion over on the GT3 forum and the Racing/DE forum. As long as you are running 30 series rubber you are within 2% of the RD of the OEM size as well there is not a significant increase in size either between the 295 adn 315.
Here are the results of my research on the tires I am putting on (Nitto NT01 315/30/18) and compared to the OEM rubber as well as popular choices for the car:
Michelen PS2's currently on the car:
ID-->25.00 Width-->11.90 Rev/Mile-->832
MPSC (non-shaved):
ID-->25.20 Width-->12.10 Rev/Mile-->833
Nitto 275/35:
ID-->25.55 Width-->10.91 Rev/Mile-->813
Nitto 315/30:
ID-->25.35 Width-->12.60 Rev/Mile-->819
ID=Inflated Diameter
OK...I have 19" 997 Sport Designs....they are 19x11 et 67 and 19x8 et57....I used a 15mm spacer on the front making them 19x8 and et42....those are almost exactly the 996 GT3 specs but in 19s...No rubbing and they fir INSIDE the fenders front and rear....
As long as the tires are 235/35-19 front and 295/25-19 rear, you will be fine with this setup. If you go to a taller rear tire, you may have a fender clearance issue.
I have 19"s on my 03 996 - No problems with rubbing or sticking out.
You can go to a 315/25/19 tire at the rear for a better bead to protect the rim, and this still doesn't rub.
Toyo T1R and other's available in this size for the 19" rim.
Here are my Iforged wheels, they are 19"x8.5" in the front I believe, and 19"x11" in the rear, unfortunately I dont know the offsets..
Ya, the car is not lowered.... yet....
Delirium - nice looking ride! Is that the first time you have posted pics? I don't recall seeing pics of your ride before this post.
What are the rear wheel offsets? They do appear to be slightly extended past the fender.
Thanks Gota911, i have posted a couple of pics before, but not a whole lot. Ill try to take more pictures. Ill definately take pictures after I lower it.
Ya it is hard for me to tell if it is sticking out or not, I think the very top of the fender is perfectly flush with the wheel (tire may portrude a little) but it definately sticks out at the bottom & middle of the fenders...
I dont know what the offsets are as I bought these 2nd hand... is there any way for me to tell?
Porsche usually has the offset cast in the wheel by the valve stem. However, looking at your wheels I'd bet the offset is probably stamped on the back side of the wheel.
If so, you will need to remove the wheel to read the offset. Let us know what it is after you check.
Thats the iForged "custom" 996 offest...it looks too aggressive for my taste in the rear....but once its lowered and you add some negative camber to it, it should be fine....you will have a problem with your rear tires wearing much more quickly on the inside.
Totally forgot about that. The iForged wheels are the ones that "Dan at Vivid" (and others) was selling and several people bought them. I actually got several PM's from members (names I am not giving out) that were pissed that Dan "promised" they were the correct size saying that others commented the offsets were "wrong" when in fact they are not even close. Those offsets would be better suited on a C4S/TT.
I guess offset is a personal thing when you deviate from the rec'd factory range but when you have suspension compression and you hear the fender cut the tire then you understand you have the wrong size.
That sounds really scary!! my fenders have not rubbed the tire yet, as my car is not lowered, but I dont plan to lower the rear that much, maybe 1/2". I got recommendations from 2 reputable shops in my area that said they can shave a couple of mm from the hub of the wheel in order to gain a little bit of clearance, has anyone done this b4? I heard that many people have, but not on this forum.
Do NOT shave the wheel. Personally, taking away the very thing that holds the structural integrity of the wheel is a chance that is not worth it IMHO. Getting it shaved PERFECTLY requires some serious equipment to make sure that you wheel rotates in balance. Not even worth the chance IMHO.
Sure, some race teams might do it, etc, etc, etc, but that is to decrease weight and it is NOT done at the hub and they also don't keep those rims on the car for the long haul.
If anything, I would roll the fenders before I shaved the rim.
I really HATE it when this happens, but I also agree with Dell that you should NOT "shave" the wheels.
Besides, every guy knows that "shaving" should be limited to Pussies... not wheels!
