Wheel size and offset questions

[2fnloud]

I didn't want to visit the other site to search this, and I have never seen the information talked about here.

I am looking at a rim in two possible sizes

18x9 +30
18x10 +40

With the 18x9's I know that the rim would be 10mm farther from the strut housing and and adding 22mm to the amount of rim the could stick out from the side of the car.

With the 18x10's I know that the rim would be 13mm closer to the strut housing and adding 25mm to the amount of rim the could stick out from the side of the car.

Should the 18x10's fit or would they hit the strut housing? I know that the 18x9' should fit, it is a matter of if the spokes clear the calipers.

Any input?

Rims in question:

http://www.godspeedwheels.com/images/dealerimages/products/omega18x10_blkchr_s.jpg

[IPD]

10" wide rims +40 will never fit up front. it would the first time in the history of EVER that i've heard of it working.

i don't know if you understand offset math, so let me see if i can help.

first, divide the width by 1/2. then imagine an offset of ZERO. in this case, that would be 5" inboard, 5" outboard (from the hub surface). a positive offset means that the hub is further OUTBOARD, where a negative offset means it's further INBOARD.

an inch = 25.4mm (just round to 25mm). so a 25mm offset on a 10" rim would be 4" outboard, 6" inboard.

still with me?

ok. stock vr4 is 8.5" wide and either 42 or 45 mm offset (i can't remember). 45mm is 1.8", so add that to the 4.25" you would have on a zero-offset, and you get ~6" inboard. this is pretty close to what 10" with 24mm offset would be.

so for 10" with 40mm offset, that's about 6.6" inboard; over 1/2 and inch further inboard than stock.

[2fnloud]

that was the impression that I had but I have read so much and it was so long ago, I forgot. I thought snakeskinner put 10's all the way around but
I don't remember the offset.

[IPD]

i have 10's all the way around, but they are not flush. personally, i like the look, but many don't.

[2fnloud]

i have 10's all the way around, but they are not flush. personally, i like the look, but many don't.

At what offset?

[2fnloud]

And Matt only put 9's in the front, 10.5 in the rear.

[IPD]

18x10 24mm offset. only issue i've had is having to run a spacer and shaving the calipers when i did my 2g brake conversion. but that's not an offset issue; that's a spoke issue--unique to design. each wheel has its own spoke clearance, so you're pretty much on your own in figuring out what works (unless someone has done it already for you).

i'm hoping to get a BBK and ditch the spacers. there's plenty of room further out from the hub. the reason i went with 10" all around was that i wanted to be able to rotate without dismounting.

fwiw, if i had the front fenders rolled, you probably wouldn't even notice them sticking out.

[2fnloud]

10" wide rims +40 will never fit up front. it would the first time in the history of EVER that i've heard of it working.

i don't know if you understand offset math, so let me see if i can help.

first, divide the width by 1/2. then imagine an offset of ZERO. in this case, that would be 5" inboard, 5" outboard (from the hub surface). a positive offset means that the hub is further OUTBOARD, where a negative offset means it's further INBOARD.

an inch = 25.4mm (just round to 25mm). so a 25mm offset on a 10" rim would be 4" outboard, 6" inboard.

still with me?

ok. stock vr4 is 8.5" wide and either 42 or 45 mm offset (i can't remember). 45mm is 1.8", so add that to the 4.25" you would have on a zero-offset, and you get ~6" inboard. this is pretty close to what 10" with 24mm offset would be.

so for 10" with 40mm offset, that's about 6.6" inboard; over 1/2 and inch further inboard than stock.

So this program (http://www.1010tires.com/WheelOffsetCalculator.asp) is wrong? BTW the offset for at least a 2nd gen R/T / VR4 is 46mm

[IPD]

no, i think it's accurate. 14mm is .55". my "estmate" was .6" (and i rounded the 25.4mm).

a calculator will always be more accurate. i just use rounding so i can compute in my head on the fly.

[2fnloud]

Oh ok, just checking. I could always just wimp out and get a set of the 95-96 R/T 18" 5 spokes.

[IPD]

if your car has stock 2g stealth r/t body; then the OEM 5-spokes are money, imho. there are others that work too, but the design you posted is a bit too "square-ish" for the curvy lines of a 2g stealth.

that's just my opinion however.

[2fnloud]

Car is 2nd gen R/T

http://i202.photobucket.com/albums/aa177/2fnloud/1994%20Dodge%20Stealth/PICT3130.jpg

I was just wanting black chrome and lighter weight.

[Spyder]

My new rims should be coming in this week I hope. 18X9 +38 and 18x10 +42, tires are 255/40/18 and 295/35/18.

[IPD]

i loves me 285's. :) i almost went with the 295's though.

[Spyder]

Actually make that Feb 7, I guess I was just being too hopeful lol

[Spyder]

http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/168654_189636934391685_100000361388061_542568_4770 133_n.jpg

http://a7.sphotos.ak.fbcdn.net/hphotos-ak-snc6/180762_189639297724782_100000361388061_542572_2565 128_n.jpg

F18x9 255/40/18

R18x10 295/35/18

[Spyder]

I can also tell you that the 18x10 43offset ALMOST cleared the strut. Im guessing a 38 offset "should" clear but its coming down to like hair thin clearances. I tested the 18x10 43et up front with the 255/40/18 tires so keep that in mind. It didnt stick out much really.

[MR2]

i loves me 285's. :) i almost went with the 295's though.

can you show me some pictures please....show me caliper clearance and how far these stick out past the fender and clearance to the shock if at all possible?

[IPD]

I can also tell you that the 18x10 43offset ALMOST cleared the strut. Im guessing a 38 offset "should" clear but its coming down to like hair thin clearances. I tested the 18x10 43et up front with the 255/40/18 tires so keep that in mind. It didnt stick out much really.

you got a +43 offset 10" rim to fit the STOCK strut perch up front? WTF? *edit* must have been the 255 tires being pulled razor thin on such a wide rim. no farking way that would work with 285's--which actually MATCH the rim size.


can you show me some pictures please....show me caliper clearance and how far these stick out past the fender and clearance to the shock if at all possible?

you wouldn't like it. mine stick out normally, but i've also got spacers on them currently...because GT-PRO fucked up when ordering them. they don't clear the stock tt calipers (1g or 2g). they cleared the stock front perches about as well as my stock 225's did--maybe a bit better. i don't know that i'd go with greater offset than 24mm (what i have) unless i were going to use coilovers. i would probably have gone with 40mm offset if i'd known that it wasn't going to clear the calipers without spacers.

p.s.

it appears it's JUST me, btw. every other person i've talked to with GT-C's doesn't seem to have clearance issues with the tt brakes. mine rub FRONT AND BACK on the 2g tt brakes. i took to shaving the caliper's slightly with a die grinder; but i really think the only "cure" is for a 355mm BBK. gt-pro really f'd up. i just didn't know it until recently because i'd been running my rims with n/a brakes for 2+ years. i'd ordered them to fit over tt brakes, but i'd never had a chance to test it until i did my swap.

[MR2]

plleeeaassse pix

not so much to show how your car looks with it, more to show how much room I have to move things around to make it all fit ;)

[IPD]

i'll try and get pics when i get home. only pics i have currently are old ones & even those are on the old website (which i now no longer have access to because certain moderators are intolerant).

[MR2]

Thanks dude, I'll start a new thread I think (10" wide rims deserve it) or maybe i'll look for an old one to resurrect :p