Havok_RLS2

iTrader: (9)

I'm also concered about the offset question. My wife has just cleared me to take part in Z1's Work Emotion CR Group Buy (All it cost me was buying her a pair of new Manolo Blahnik's $1100+ shoes). I've been trying to decide if I want to go with the 18x9.5 rears in a +20 or +12. Z1 currently has the +20's on their show car but after hearing everyone on this forum talking about the +12's fitting without rubbing I've been thinking about it more and more.
So far my suspension is stock on my 05 Z. I dont know if any shops in the area that can roll my fenders and I'm really not sure I want to have that done. Cutting is out of the question. I'm planning on getting the RSR Ti2000 lowering springs in the future.
Now... All I need is the FACTS. None of that "My brother's friends, sister's, cuzins.... Junk." Just the facts. Will the +12 work without rubbing or wont it? And what brand and size tires should I be planning to buy?
I know all you guys are smart enough to find answers, I'm just looking for the RIGHT answer.

Havok_RLS2

iTrader: (9)

Anyone??? Comon... I thought I could count on you guys.

002-M-P

iTrader: (12)

I have been searching for the +12 offset on cars for a while now, and its not like many people are running it w/o problems. If you plan on running a 9.5 +12 in the rear be ready to roll your fenders if the car is lowered at all (not sure about stock height). Running a 9.5 +12 rear is the equivalent to running a 10.5 +25 rear and everyone I have seen that is running a 10.5 +22 is rolled and that only sticks out 3mm extra (not noticable) than the 9.5 +12.

Everyone I have talked to (Steve@Evolution, Mackin Industries, Sharif@Forged) thinks it will work no problem. But I think I am just going to save myself the hassle of finding out and give myself the ability to run 295's and get some 18x10.5 +22 rear and 9.5 +22 or +12 front rather than what I have been planning. Call around see what people think. It just seems noone on here has really tried the 9.5 +12 yet, so don't expect much of confirming response, but rather the "yeah i think that will fit" response.

Havok_RLS2

iTrader: (9)

^^^^ +100 Dude, thanks for chiming in. As I said before I'm just making sure I have all the information I need before giving Z1 a call with my credit card numbers. The more information I can get, the better.

bilinghm

iTrader: (3)

I too have wrestled with the offset question. My suggestion is to do a clearence test on YOUR OWN car. I made the assumption that the proper tire is a 275 40 18 for the 9.5x18 you would be running. The 275 has a maximum section width (not tread width ) of 11 inches. Therefore, 11" is 3" wider that the current setup on the rear of your car, 1.5 inches on the inside and 1.5 inches on the outside. It would be nice if you could add something to the outside edge of your stock tire and drive around to see if it hits. However, that is impossible. So, the same clearence check may be made by adding the exact same amount to the inside edge of the fender. Cut a piece of cardboard, or a soda straw as I did, and tape it to the edge of the rear wheel well. Find a material that will show evidence of being struck by the tire (white color).

In your case the cardboard should stick inward 1.5 " plus the differece in offset from stock: 18mm. Therefore the reduction in clearance with your new tire (not wheel) is 1.5" + 18mm= 56mm or 2 1/4". After all, it is the tire that will hit, not the wheel.

This somwhat overstates the clearance issue because the tire is curved and not 11" wide at the top, but it will give you a good indication of how much room you will have. I did this for my own set-up, 9.5x18 +15, and drove around for several days seeing if and when the tire hit the spacer. In normal driving, absolutely no problem, across big speed bumps, the tire will hit if you go too fast. Try this and see if it will work for you.

tinybigrig

call jon at wheel studio 888 288 0070 tell him brent sent you. he'll set you up with all you need to know.

brent

zillinois

iTrader: (6)

There is at least one person on this board with pics posted of 9.5 x 12mm. I ran 10.5 x 30mm with 295's on the back lowered 1" and camber brought back to -1.5 and I had no issues. To give you and idea a 10.5 @ 30mm equals 9.5 @ 18mm. I can guarantee you down to 18mm.

002-M-P

iTrader: (12)

zillinois: stock fenders or rolled?

zillinois

iTrader: (6)

Stock fender, no roll. I have no doubt at all that you could
get a 275 on a 9.5" rim and a 12 offset and get it too fit. IIRC,
the guy with 9.5" @ 12mm offset eventually did roll his fenders.
Initially he did not.

I went through this last year and made an
entire database of wheel offsets and linked them to pics. Its
somewhere in the archives on this board. Ultimately its up to
you. Everyone has there own tastes. There was some post
recently about somebody with like a 10.5 and a 11mm offset
and dropped an inch and a half or something crazy like that. Yes, OK, it fit
but his camber was like -4 to make that happen. So its really
up to you. I personally would not go any further than 9.5/18mm if you
plan to drop it at all. Yes, it'll probably fit, but do you want to go
through tires every 5000 miles and degrade your handing?? Good luck, I know its a pain
in the azz.

jimster716

iTrader: (3)

Sad that you have to bribe your wife for your own purchases. Even sadder that I feel your pain. LOL. At least an expensive set of wheels will last a lot longer than an expensive pair of women's shoes (irony that price is inversely proportional to the amount of material used to make the shoe) which will go out of style and collect dust next to her 20 other pairs of shoes.

alex12

iTrader: (5)

I don't have much to add to the offset issue, but have you noticed that your wife's shoes are only $200 less than the rims you are getting?

I just find that very surprising

Havok_RLS2

iTrader: (9)

Yeah. She thought it to be a fair exchange. Still... I don't get the logic. Women.

Still... It could have been worse. She's letting me get away with calling this her Big X-mas gift.

Havok_RLS2

iTrader: (9)

Good information and advice. Thanks

Havok_RLS2

iTrader: (9)

You have no Idea. The current count for shoes is 38 which include 2 pairs of Manolo Blahnik's. The first pair I bought on sale for $525.00. Any married man will tell you that you gotta do what ya gotta do to keep the peace. What's fair for one is fair for the other.

I just can't wait to see what it'll cost me when I ask for the turbo kit.

Mike Wazowski

iTrader: (113)

= new wedding ring and second honeymoon in Bora Bora

Havok_RLS2

iTrader: (9)

God I hope not...

Jason@Performance

iTrader: (11)

9.5 + 12mm on the rear will fit with 275 tire on it...

If you full slam you will need to roll your fender just a little bit...

That wheel will stick out 5mm more then the wheel I am currently running on the rear...

But you will be fine unless you completely slam the car...

it will stick out just sliiiightly more then this rear wheel at stock height... 5mm to be exact...

will be perfectly flush, and will camber in when the suspension compress's... depending on the tire you go with, you may have to roll just slightly... but not much...

pictured here is a 10.5 +30mm which is 5mm further into the wheel well then the 9.5 +12mm that is a 295 tire... so cut off an inch from the inside and move the wheel out just a tad...