help me reason for s13 offset (warning: late night post)

[95zilvia]

ok 17x9 +27 w/ 235/40.17 does NOT clear my MR coilovers on my s13.
i added a 8mm spacer, and it still rubs by just a frickin little, i say if i had a 10 mm spacer, it'd be fuckin perfect.

so, in order to clear my coilovers, i would need 17x9 +27 with 10 mm spacer, making it +17 mm offset. right so far?

so a 17x9 +17 w/ 235/40/17 would clear my fronts. barely.

so now i want a 17x8 in the front, because im using the 17x9 +27 in the rears. (may i add they fit fucking so nice)

so an inch is 25 mm right? so +17 mm minus 25mm is what, -8mm?

so i would need a 17x8 -8 to = a 17x9 +17?

do they usually make rims in a -8? lets just round it off to -10

so what i could also do is,
17x8 0 with 10 mm spacer.
17x8 +10 with 20mm spacer ok, i dont like spacers forget this idea.

or should i just do the same setup in the front 17x9 +17 with 225/45/17 tire. cuz i have those tires already layin around.

voice some opinions, sorry, it's late, im kinda babblin, but this rim shit is pissin me off. good thing i bought only the rear rims and played around with fitment.

comments and opinions wanted.

[DocTaDrifT]

too much math :hammer: :mepoke:

[ZK]

You need to specify better which sizes are going on the front and rear.


so a 17x9 +17 w/ 235/40/17 would clear my fronts. barely.


This is going on front!? You must have some modified fenders!

Personally on a S13 I think a 17x8 in front with a 225 is fine. Stagger a 17x9 with a 235 or 245 in back and you're good.

[S13 Charlie]

95 Zilvia - Based on what you are saying, offset isn't so much the issue as backspacing. That is the distance from the inboard rim edge to the mounting surface. Also, your calculations didn't take into account that if the rim width was reduced by 1", then you're only affected by 1/2" of that. - but that's beside the point.

Because you're reducing rim width, you can actually get away with higher offset in the front and still maintain the desired backspacing given by 17x9 +17. See if these calcs make sense:

Backspacing = Rim width / 2 + offset
B = 4.5" [114.3mm] + 17 mm = 131.3 (that's your current setup)

Now:

B [131.3] = 4" [101.6mm] + X (offset) solving for X would give an offset of 29.7 maximum. That would give you the desired clearance, but for better flushness, I say go +15 to +25 and you'd clear by a mile. Sorry if any of that doesn't make sense, I'm an engineer, so that was kinda fun for me. :ughd:

[rancid240]

If you want the 17x8 to equal the 17x9 +17 in terms of flushness, you would need a wheel with a +4 offset. You forgot to divide the 25mm by 2.

[Sil Beer S13]

go 17x8 +0. you will be fine you wont need to mod the fenders.

[95zilvia]

You need to specify better which sizes are going on the front and rear.



This is going on front!? You must have some modified fenders!

Personally on a S13 I think a 17x8 in front with a 225 is fine. Stagger a 17x9 with a 235 or 245 in back and you're good.

no, im talkin about coilover clearance, actually, this is pretty damn flush. i'll have to end up rolling my front fenders.

in the front, i want to put 17x8 and im questionin the offset, with a 225/45/17 tire.
in the rear, i'm putting the 17x9 +27 offset with 235/40/17 tire, i've already decided on that.

thanks, see, i learned somethin today, i didnt know that u had to divide the inch by 2, cuz i guess you add it to each side.

this'll help me a lot, because it's really hard to find wheels with offsets in the negatives.

alright, so now what the fuk am i supposed to do, the wheel i need for the front is 17x8 0 offset, don't even know who makes these.

any suggestions? they need to clear MR coilovers.

damn, i gues i'll have to be using a fat spacer.

[Dousan_PG]

you should have done some research
http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB9&Number=67325238&page=0&view=collapsed&sb=5&o=&fpart=1


and your coilovers suck
shitty clearance
my friend ran r33 gtr 17x9 +30 w/ a 5mm sapcer and cleared them coilovers on JIC FLTa2

[orion::S14]

No, no , no...

To have the same clearance...disregarding flushness:

9", +17...you are taking away one inch to switch to 8"...that comes off each side (all these measurements are made with respect to the centerline, since offset is based on the centerline of the wheel).

...i.e. an 8", +17 has exactly 1/2" more clearance as compared to a 9", +17...

So 1/2" = ~13mm

8", +30 fits EXACTLY the same as 9", +17...with respect to clearance on the inside of the wheel (coilover clearance).

- Brian

[95zilvia]

fuckin shit, now i just got more confused, fuck
so to have same CLEARANCE, i need to have 17x8 +30 !?!?!?
so if i get the 17x8 +28 it would clear my coilovers by like, 6 mm?

brian, i hope you're right, becuase 17x8 +28 is the lowest offset the rims i want come in.
anyone verify this?

actually, from the link that dousan had,
-Wheel width/offset needed for clearance of coilovers is as follows (disregarding brake clearance):

6" +54 or lower
6.5" +45 or lower
7" +40 or lower
7.5" +34 or lower
8" +30 or lower
8.5" +24 or lower
9" +20 or lower

since i had a x9 +19 (27 with a 8mm spacer) and it didnt clear, well, it almost did, very close
so a 17x8 +28 would clear cuz i figure a 17x9 with 17 would clear, then 17x8 +30 would clear, then 17x8 +28 would clear by like, 2-3 mm, ooooOO

ok, so i decided 17x8 +28

is that good enuff clearance? how much does that clearance change when the car is under load, or when hittin bumps n shit?

[S13 Charlie]

Damn, I guess my calculations didn't make sense to anyone.. cause I thought I said an offset of 29.7 (30mm) or lower would be equal to your 9" +17mm wheel. oh well.

The 17 x 8 +28 wheel will clear pretty much as well as your 17x9 "+17" . And if your offset changes under load or over bumps, then you've got a bigger problem to worry about than hitting your coilover.. Keep your lugnuts tight.

[95zilvia]

good shit charlie

[Salty_X]

Fuckin A people...

http://toy4two.home.mindspring.com/offset.html

[rancid240]

dont do a 17x8 +28. Not flush enough. I would do at least a +15.

[jy116]

you should have done some research
http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB9&Number=67325238&page=0&view=collapsed&sb=5&o=&fpart=1


and your coilovers suck
shitty clearance
my friend ran r33 gtr 17x9 +30 w/ a 5mm sapcer and cleared them coilovers on JIC FLTa2

hey man, sorry this is an old thread, but Im researching buying some rims, fronts will be 17x8 +35 [would get lower offset, but good deal]. Given wut u said, I have s13, same coilovers, and am wondering, What size tires ur frend use? And was it an s13?

Thanks, any info helps :]
[email protected] or reply here

[Shawn_of_the_Dead]

I am so damn confused.....but it's old and I am reviving it.

I am looking into a set of 17x9 (rears) with 20mm offset. I really dont like the streched look, but will if I have to. I would really like to run 275's in the rear. Is this possible with the offset and will it clear? Front will be 17x7.5 or 17x8...and either 32 or 42 offset...and would like to run 235's up front.

[orion::S14]

9", +20 and 275 DO NOT go togethe on your 240SX.

If you want 275s to fit with some camber, and a little roll...you'll need a +35 or +40 for a 9" wheel.

255/40-17 on a 9", +35 need a roll and camber on my old S13.

- Brian

[Shawn_of_the_Dead]

ahh crap.

[95zilvia]

275, hehehe.
My friend with a s13, KA powered just bought widebody and 9" rims.
He asked me if 255s are cool. I thought that was overkill already!

[Shawn_of_the_Dead]

I wouldn't buy a widebody and choose 9" wheels....however I think the fat rubber is alot meaner than a stretch. I know I will catch shit for it, but in the end I think it looks better.

[240sxislander]

Will a 18x8" +40 w/ 235/40 clear on an S13 with D2 coilovers? I don't plan on pulling or rolling the fenders, and I want to have my camber set at 0-.5 degrees. This is a daily driver, and the car is pretty low. I know this is an old thread, but I suck at math.

[blk90s13]

275, hehehe.
My friend with a s13, KA powered just bought widebody and 9" rims.
He asked me if 255s are cool. I thought that was overkill already!


exactly 225 is about righ


how does it look ?

[240sxislander]

I guess this forum is just like the other ones I've been to. I can't get any help or advice from anybody here. Its alright..........

[orion::S14]

Will a 18x8" +40 w/ 235/40 clear on an S13 with D2 coilovers? I don't plan on pulling or rolling the fenders, and I want to have my camber set at 0-.5 degrees...

... I can't get any help or advice from anybody here...

Awww...boo hoo...

No one's helped b/c you could find this info in half the other "will these fit" threads....!!!

...but to be helpful, an 8" wide wheel with a +40 will most likely hit the coilover up front.

Shoot for 8", +30...and even that may limit you to a 225/40-18 tire.

- Brian

[240sxislander]

I appreciate the reply orion, however, I noticed that alot of the people here setup their cars by rolling and pulling the fenders, have massive negative camber, and stretch the hell outta the tires which I don't plan on doing. Otherwise I wouldn't be asking any questions about fitment issues. So a 18x8+35 will fit perfect without the wheel sticking out past the fender, correct? Thaks...

[RightWheelDrive]

I'm running 8.5 with 225/45/17 and 25 offset. It clears the back very well if that helps. 8 with 35 offset will not stick out. 95silvia is sent you a pm.

[240sxislander]

Do you have any side view pics of your car?