derekinthez

I've got 19's on my 91 2 +2 --no rubbing issues at all (its more show than go). Although I do run 18's on my 94TT.

Murph Z32

I searched a little and I couldn't find what I was looking for. I just want to make sure these are the correct offsets for the volk gts on a TT Z32, 18X8 +37 front and 18X10 +43. Thanks

Goofyz

anything for the front over 34 offset (stock calipers) is ok, I am pretty sure anything over 22 is good for the rear again (stock calipers). i think 8" rims can support up to 235-255 and 10" can go up to 345s but anything over 265 with that offset will give you rims that stick out past the wheel wells, which will give you a reason to get a wide body kit , which will give you a reason to get a new paint job....GOD I LOVE CARS!!!

Murph Z32

Well, I want to put on 275's, how much will it stick out? Is there a better offset?

snwbrderphat540

probably less offset in the rear. dont know why you'd want more offset in the rear than the front, well, unless you had FF or hella deep wheel wells.

EDIT: like i said in my pm though no expert and its hard to imagine volk themselves being wrong.

Murph Z32

They make a + 49 offset for the 18 x 10, but the volk page says the z32 gets a + 43.

Murph Z32

That is what the volk fitment pager reccomends for the Z32 is the 18 x 10 +43 in the rear. Someone suggested closer to +50. I don't know anything about offsets and I don't want to make an expensive mistake.

Goofyz

Get a 2x4 and put it across your spare tire, measure the distance from the 2x4 to the center of the wheel,subtract the distance of the rubber sitcking past the rim, that should be your minimum offset cause the spare is supposed to work on all wheels. Remember to think metric you will find it to be about 30-32mm (or should be) if you want a bigger rim say like a staggered look you will want to split the differnce say front is 40, but rim is 9 tire is 245, back is 10 tire is 275 differnce of 30mm but you don't want the rim to stick out much further but still want a wider lip on the rim.....you will go about 15mm so 35+ 15 is 50. Here is the catch... you are going for staggerd wheels, front offset is bigger to accomodate bigger brakes, rear offset (minimum is smaller) the book (NISSAN) manual says front is 45 and rear is 35. Aftermarket wheels tend to split the difference hence the 38-40. but they get away with that because people normally go with bigger wheels, think salad bowls, bigger the bowl the smaller the need for a larger offset. This is why some rims need more offset than others. Flatter backs on rims (usually cheaper rims) mean you will need a bigger offset. VOLK are pretty high end, they will use as little metal as possible cuase they also use expensive metal. Because they use stronger alloys they need less metal and becuase they can, they use curves on the inside of the rim therefore they need less offset. If you can follow all this then you can make up your own mind on offset based on what you want your car to look like. Following pictures are of Volk wheels at about the same measurements you want. Staggerd, and if i do say so myself, looking damn good.

Murph Z32

Ok, After much research from my wheel guy I ordered the Volk GTS in mercury silver with the correct offsets. My question now is what size tires do I need to put on the fronts? The wheel is 18 x 8. I just want to let you all know I have no Idea what to do here. I've read the posts on tire sizes and I'm confused. I'm under the impression I can run a 40 series on the front and a 35 series on the back. 245 40 18 and 275 35 18 on the back. The guy I buy tires from says the 40 series will strech and the ride height will be the same. I read someone else's post and they run a 255 35 18 on all 4 wheels. Should I go with a wider shorter tire in the front? Or is it okay to go with the taller tire? Should I consider running a 40 series 275 in the back, or will it rub? At this time I can't afford an aftermarket suspension. Thanks for helping the stupid.

snwbrderphat540

i wouldnt change the tire height from front to rear, keep it the same, run all 35 or all 40, imo 35's a pretty thin but with and 18" rim..... i would use a 35 all around, and 245's sound good up front and 275 (its 8" rims all around right?) sounds okey dokey to. i dont see teh purpose of changing the tire height from front to back though.

Murph Z32

18 x 8 front 18 x 10 rear

Murph Z32

Ok, I called the tire rack and told them my situation and they informed me I need 245 40 18 on the front and 275 35 18 on the back.

snwbrderphat540

tire rack is a good company, but idk if i trust the workers there, they supply great though. lol. i still dont get teh taller tire in the front....

91zxtt

You should go 35's all the way around. 40's on 18's will be too tall and will likely rub in the front.

snwbrderphat540

thats what i think^^^ i could even see a taller tire in back, but in front, it doesnt make any sense, if live never seen that sept on FWD drag cars lol.... idk, id just like to hear teh reason they suggest that and maybe they can shut me up.

Murph Z32

Tire rack sells volk wheels in this size and they say that its the best fitment for the vehicle. no rubbing issues. It evens out to the same height.

b300z

the two will be the same height. like ive said earlier in the thread. the 35/40 is a ratio to the 245/275. theres not even half a centimeter of difference between the two

oh, and i would go with the 245/40 and 275/35. thats what i had on my last z

Murph Z32

That's what the tire rack said. Plus the front tires are much cheaper in those sizes.

Goofyz

If you look earlier in this thread response 67 you will see some pics of 18s on the Z the front tire is 245 40 18 and the back is 275 40 18, also posts 69-73 kinda explain the theory the guys at Tirerack subscribe to about different sizes. If you measure on the picutures between two lugnuts (for reference to your car) and then center of the wheel to the top center of the wheel well you can see what the clearence would be for your car. Pictures are of an aftermarket suspension set up so you will have to make your measurements to figure out the difference (a little math, proportions and fractions, oh my!) between stock and custom.

Murph Z32

Ok, but when you said th 275 40 18 was run the Z had adjustable suspension. I don't have the money for one right now, how would a 40 series tire effect the car with a stock suspension?

Goofyz

Not really, its the 275 35 18, not 40 series. Do some measuring from the center of the wheel to the bottom of the fender to see how much room you will have. My guess is the 35 series would work on both front and back with stock suspension. Not sure 40 series would work on the front at 18" with stock suspension.

91zxtt

I know that if my tires were 1/2 centimeter taller that I would have rubbing issues.

I'm still standing by my original statement....245/40/18's are way too big in the front on this car and will look silly.

b300z

heres what i used to calculate the difference

http://www.miata.net/garage/tirecalc.html

91zxtt

Right....the difference between the front and rear is negligible there. I was talking about the difference between my current setup in the front and what he is proposing doing.

What is the height difference between a 255/40/17 and a 245/40/18?

b300z

diameter difference of .7in

i ran 245/45/17 up front with no rubbing (i was wrong earlier) and they have the same diameter as the 245/45/18s. radius is .1in off