what are these measures you speak of? what tire sizes would you recommend?

 

Should be ok if you pick a 265/35-18 or perhaps 255/35-18, to keep the tire profile down.

Try running slightly more negative camber. You might need to remove the LF fender liner bolt, and perhaps roll fender lips.

If you choose 255/35-18 tire size you should be ok.

The only 265/35-18 that's within our stock tire diameter are the Porsche OE fitments from Continental...Sport Contact 2s.

 

Since the new MR2 Spyder will have 15F&16R, I went to the Corvette site to check the aspect ratio on it's 17F&18R and still can not understand why they do this (25.7F&26.5R)!

Damn, the Z06 has 9.5"F & 10.5"R
Would that work on the 7 with proper offset, but without rolling the fender or adding flares?

 

I believe the C5 Z06 has rear end gearing the requires such tall tires in back. Shorter tires will screw up the gearing (too short?).

We could also do Z06 fitment sizes, except we'd go with 18s all around, instead of 17 fr/18 rr.

I mentioned this fitment in a previous post--it's specific with using Volk CE28Ns, and either Pirelli P-Zero Asimmetricos OR Continental Sport Contact 2s. Both are OE 2002/2003 Porsche 996 Carrera/Carrera 4S rear tire fitments (thus the N2 designation on the tires). These are special because the 265/35-18 N2 tire is actually shorter in overall diameter than other tire brands. This is crucial for proper front end clearance from the fender lips.

Fronts--9.5 x 18, 47-mm offset with 265/35-18 (25.1 inches overall diameter).

Rears--10.5 x 18, 44-mm offset with 295/30-18 (25 inches overall diameter).

You "might" need to dial in more negative camber AND/OR roll the rear fender lips to get the big 295s to tuck underneath the bodywork?

I'm excited about this fitment myself--I would like to do this setup as a drivers education fitment, using 265/35-18 and 285/30-18 Michelin Pilot Sport Cup Competition R compound tires.

There are three reasons for choosing Volk CE28Ns.

1) CE28Ns are probably the lightest road wheels available in any given size. You'll want light wheels--265/35-18 and 295/30-18 are fat tires, and WON'T be lightweight! I'd choose Pirelli P-Zero Asimmetricos over the Continental Sport Contact 2s--Pirellis are lighter than other tire brands in any given tire size.

2) CE28Ns are available in the diameter, widths and offsets you'll need for properly fitting our FD Rx7s.

3) Rishie can get you an excellent deal on the Volk CE28Ns

 

I run that exact size/offset with 265/35/18's. I had rubbing on my right front but for the life of me, can't figure out why. Nothing currently rubs. I'm using Kumho 712's in that size which are a bit taller than stock. FWIW, those Continental SC2's are great tires. I'm considering replacing the Kumho's with them.

If you had a choice though, get the stickiest tire you can afford. Don't worry as much about width. The difference between a 255 or a 265 will be almost immeasureable. The difference between a 300 treadwear and say a 100 will yield a much bigger increase in grip assuming the same type of tread compound. So if you can get 255's all around with some really sticky rubber, go that route as opposed to 265's in a tire you really don't want.
Michel

 

I run that setup with Toyo t1s and have no problems with a lowered suspension either.
I did remove the little bolts around front fender for extra protection.You can go wider on the rears, mine 275/35 ,rolled the fender lip for extra clearance,will post pics this weekend. C.

 

OK, i did do a few searches and wasnt fully satisfied with the answers i came upon. And sorry if this has been asked before. But lets compare a 16" wheel (tyre included)which is the same weight and same outer radius as a 17" wheel (tyre included). Now how would each affect you 1/4 mile times and your logic behind it?

Thanx in advance.

 

16" will probably be a little faster, but I don't think it will be a huge difference.

Reasons:
- Rotational inertia will be higher for 17" wheels of the same weight and tire diameter because the mass is further from the wheel center.

- 16" has more sidewall, which should help with launching.

There have been several magazine articles over the years that compare wheel size like this.

-Max

 

Can anyone tell me:

1. Backspacing for a 17x9" +45 SSR integral?

2. Maximum backspacing allowed in rear of FDw/ stock-style suspension.

3. Front-spacing on a 17x9" integral +38

4. Maximum allowable frontspacing on rear of FD w/out fender rolling

5. Anybody have two 17x9" integrals w/ +38 offset they'd like to get rid of?

Need info specific to these wheels, THANKS!

 

Does anyone have any pics of a rolled fender lip?

I have 18x10's in the back with 265's on them, and I'd like to go up to 285's but it wouds like you have to roll the fender...

thanks,
kyle

 

I fit 285 30 18 S-03's in the rear with no fitment problems. I have run stock, H&R and HKS springs with Bilsteins and wheels with a +40 offset. I run 255 35 18's in the FRONT with some bad rubbing with the lowering springs. The H&R's made them rub the most and the HKS springs not so much except under hard cornering. Never any problems in the rears.

 

I'm looking to get Volk GTC Face 2 with 18x9 in the front and 18x10 for the back. What offset would i need to run those rims with 245/35 front tires and 285/45 rear tires?

Anyone know the difference between High-Type, Mid-Type, and Low-Type offered for the GTC?

i'm trying to get the deepest dish possible for these rims. I know for mid-type they offer 18x9 with offset of 37 and 43 with rim depth of 63mm and 56mm respectively. and for 18x10 mid-type, they offer a 37 offset with 75mm rim depth.

for low-type they have 18x9 with 44 offset and 38 offset with 63 and 69 mm rim depth respectively. and for 18x10 they have 38 and 44 offset with 81 and 75mm rim depth.

Can anyone suggest a good combo (Rim Size, Offset, Tire Size) to achieve the deepest dish possible with no rubbing and no rolling fenders.

 

You would get better offsets going with the GTC Face 1s.
With the Face 1s, you can get 18x9 and 18x10 in either a +50 offset (ideal) in the mid-type and +47 offset in the lo-type.

With those wheel sizes, you should run 245/35 or 255/35 on the front and 285/30 on the back. Note that almost no one makes 245/35, you will have more options in 255/35.

 

What exactly is the difference between high-type, mid-type, and low-type?

I prefer the concave look of the GTC Face 2s much better. if anything, i'd settle for Face 1s up front, but definitely Face 2s for the rear. So you don't recommend having +44 offset for these rims? Would i rub with a +44 offset?

Is there a big difference between 245/35 and 255/35?

what kind of setups do those of you who have Volk rims with polished lips run?

 

You probably won't rub with a +44 offset and 255/35 tires but +50 gives you a little more room. You are probably also safe with the +44 in the back with 285/30 tires but, again, +50 gives you a little more room.

If you run the +44 offsets and lower your car, you may have to run pretty stiff springs and/or stiffer anti-roll bars.

The only differences between 255/35 and 245/35 is:

*255 is 10 mm wider (duh!)

*255/35 will be ~6mm taller diameter than 245/35, no big deal

*there are a lot more tire choices in 255/35. Tire rack only shows the Pirelli P-zero in the 245/35 size.

 

There are lots of choises for the GT-C rims but you need to be careful. High type rims have more caliper clearance but less outside lip. Low type rims have less caliper clearance but more outside lip. I don't believe you can run a low type on the front as it will not clear the caliper but you might be able to use a mid type on the front. I ordered GT-N rims 18x9 +42 front and 18x10 +49 for the rear and should have them in a week or two. Tire sizes are 255-35-18 and 285-30-18 I know I will be ok on the rear fit but the front will be close to rubbing the fender ( pulling the fender lip out ) so I may need to roll the lip so the tire won't catch. ARD T2 should be able to tell you if you can run a mid type on the front 18x9 +43 and a low type on the rear 18x10 +44 both in a face 2. Both of those offset will be close to rubbing the fenders. Good luck Jeff

 

Thanks a lot for the info guys...but alas, it doesn't seem like i'll be able to achieve the kinda rim depth i was hoping for without a widebody kit of some kind. Even with a +37 front offset on mid-type GTCs i'll only get 63mm rim depth...and i've seen 63mm, and it doesn't look like much...and with +38 rear, i'll get 81mm which is decent...but i wish it were deeper. It seems like the GTNs offer a better offset for the rear rim depth than the GTCs:

GTN: +42 offset with 81mm rim depth
GTC: +38 offset with 81mm rim depth

if you have the September 2002 issue of OPTION Magazine with the Red S15 drawing on the cover and the Free DVD included...flip to the two page VOLK RACING ad towards the middle...you'll see a picture of the Top Secret S15 with GTCs and a R-Magic FD with GTNs...the rim depth of the FD is what i'm trying to get...you think it's possible with an FD...doesn't look like it to me...but it amazes me that it's possible on a S-15. and it doesn't seem like the S-15 has a widebody kit on it...i'll scan the pictures in and post them as soon as i can.

Also...in the same OPTION Magazine...if you flip towards the end, you'll see a White Widebody Border FD with Advan Rims...with 18x9 front and 18x10 rear....now i wish i could get rim depth like that...i also wish i could get that body kit...well i'll post pictures tomorrow morning since i don't have a scanner at home.

thanks again for the info on the rims guys...

andy

 

Here's a close up of the front rim:

 

I decided not to wait for the scanner...so instead i just used by digicam to take some pictures of the magazine pictures...well here's the first one...the Top Secret S15 i was talking about...with what i consider ideal rim depth for a polished rim:

 

Here's a close up of the front rim:

 

Here's the Rear Rim:

 

Here's the BORDER Widebody FD with ADVAN RIMS:

 

Here's a front and rear view so you can get a good look at how wide it really is:

 

Here's a close up of the front rim so you can see the huge lip on this bad boy:

 

This here is a picture of FD3st04's car that i'm borrowing for a comparison for rim depth. this car has 18x9 in the fron and 18x10 in the back...with a +37 offset in the front and a a rim depth of 63mm...and a +42 offset in the rear with a rim depth of 81mm...as you can see it's no comparison to the rim depth of the above S15 pictures