Larger wheels in the rear

[YellwMonky]

Just like the top states. I was wondering what were the advantages and disadvantages of getting larger rims in the back. I'm thinking of going for 18s in the back and having 17s in the front. Also, since the rears will be 2 piece, it will be a little heavier. Any negative effects from having a setup like this?

[dave240sx]

You will lose HP.  
I'm not sure how much it will effect handling though.  

-Dave-

[adey]

you will not lose HP, but you will lose acceleration if the new rear wheels/tires are heavier than the ones you just replaced. Ceterus paribus, and they're lighter (but same diameter) you will notice increased acceleration.
As for looks... well, you be the judge. Bigger wheels out back can look better, but it's rarely done since you can't really rotate tires anymore.

[negular]

wont it throw off your ABS because of the difference of turning speeds of the tires?... if u have ABS of course,

[sykikchimp]

Not sure how larger diameter wheels would affect the car except for the loss of acceleration..  

When you put wider wheels out back, they will give you more stability while in a corner, IF you can tune your suspension around them.  They also help traction a bit when you've got more HP.  If you added wider wheels out back to a 240 with stock suspension, your car will push like FWD, until you push it too hard, and you get snap oversteer.

[ruf]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (negular @ Nov. 22 2002,3:08)</td></tr><tr><td id="QUOTE">wont it throw off your ABS because of the difference of turning speeds of the tires?... if u have ABS of course,</td></tr></table><span id='postcolor'>
Not if you size your tires correctly.

[ruf]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (YellwMonky @ Nov. 22 2002,1:45)</td></tr><tr><td id="QUOTE">since the rears will be 2 piece, it will be a little heavier. Any negative effects from having a setup like this?</td></tr></table><span id='postcolor'>
2-piece wheels tend to have a spun hoop which is very light. The mass may be heavier, but it is more centralized. A well-constructed multi-piece wheel often has a smaller moment of inertia than a lighter single-piece wheel. That having been said, a larger well-made multi-piece wheel will have little effect on forward acceleration. Although the rotational mass/moment is marginal in this case, it still does add to sprung weight which may effect handling, but you have to have very sensitive "cheeks" to feel that. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'> With a larger single-piece wheel, it's a totally different story.

Now as for running different diameters front and rear, there are some interesting theories that can be played with. Do a search about tire volume and contact patch and there's a lot of neat stuff. I'm going to run a 16x9 and 17x10 on my car with tires selected so that the internal air volume is very close front and rear. This allows me to maintain the same size contact patch front and rear while running similar air pressure. The contact patches (though the same size) will be very differently shaped. What I'm hoping for is more forward traction from the wider rears, but still being neutral side-to-side.

[YellwMonky]

Well, I'm not planning any performance mods so I dont want to sacrifice any power just for looks. I like the look of the 5zigen Copse and I want the deep dish rims in the back. The smallest deep dish rim they offer are 18 inches i believe. However, I think 18 inch rims may be a little too large for the s13. Thanks for the help.
http://home.attbi.com/~keithhalvorson/0210it_sx02_zoom.jpg
http://home.attbi.com/~keithhalvorson/0210it_sx15_zoom.jpg

[SilviaDriver]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (YellwMonky @ Nov. 22 2002,11:45)</td></tr><tr><td id="QUOTE">Just like the top states. I was wondering what were the advantages and disadvantages of getting larger rims in the back. I'm thinking of going for 18s in the back and having 17s in the front. Also, since the rears will be 2 piece, it will be a little heavier. Any negative effects from having a setup like this?</td></tr></table><span id='postcolor'>
man thats a big difference! mayb u should go something closer together so it doesn tlook like the front is way too dipped down

like 17x7.5 or 17x8 something like that so you all have the rear wider than the front which is kinda wat ur asking i dont think 17s 18s make a diffs its juss bigger wheels wat u really want is how the tires are wider dats y u go something like 17x8 and 17x9 like that

from wat i hear, you get more traction since more of the tire is is on the ground

[drift into a curb]

Those looks like 17s.. The 18s say 5zigen instead of 5zr.

[transient]

18's really are too big for a 240. I can't see why you'd need anything over 17.

[YellwMonky]

I agree. I think the s13 looks nice with some 17s...maybe even 16s. The only reason I was considering 18 is because i've read somewhere that the 2 piece (deep dish) starts at 18s. I know that people put wider tires in the rear for more traction, but i was hoping to keep them all the same for the sake of rotating the tires. Does anyone know a good 5zigen dealer? preferably in the california bay area? I don't find too many sites that actually carry the 5zigen copse rims.

Oh, and silviadriver, I'm planning on going with the apex WS coilovers so I if I did get the 18s in the back I could have adjusted the height to decrease the dip.

[KyoLo]

Match for S14 17" rims:
17x8.5 &nbsp;5/114.3 &nbsp;+30 &nbsp; 225/45-17
17x9.5 &nbsp;5/114.3 &nbsp;+28 &nbsp; 245/40-17

Match for S13 16" rims: (they only recommmend up to 16")
16x7.0 &nbsp;4/114.3 &nbsp; +30 &nbsp; 205/55-16
16x8.0 &nbsp;4/114.3 &nbsp; +35 &nbsp; 225/50-16

source from SSR website

[adey]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (YellwMonky @ Nov. 22 2002,5:29)</td></tr><tr><td id="QUOTE">The only reason I was considering 18 is because i've read somewhere that the 2 piece (deep dish) starts at 18s.</td></tr></table><span id='postcolor'>
That's a completely false rumor! you can get a super dished rim in 13" all the way up to 22". I've never seen a 12" rim, so I can't comment on that. &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'> &nbsp; I know for a fact though, that SSR make very dished rims from at LEAST 14" and up. I do remember seeing some nice lipped 13" advans on ebay a few weeks back.
So no, you don't need 18" rims for a big lip! Volk racing will make rims to-order, and you could, theoretically, ask them for a GT-C (or GT-N or GT-P or GT-A or GT-7) in 15x9 -10 ... they could make it (I'm pretty sure) and it'd have a HUGE lip, but it'd be both expensive and hard to fit on your car. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[YellwMonky]

I didn't mean that ALL rims start at 18. I'm just saying that the 5zigen Copse rims start at 18. &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/dozingoff.gif" border="0" valign="absmiddle" alt=':zzz:'>

[adey]

Ahhh, I didn't read into that part. I wouldn't bother with 5zr rims... if you're going to get even relatively expensive rims, do it right and go with some Advans, Volks or SSRs. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[logo20]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Match for S13 16" rims: (they only recommmend up to 16")
16x7.0 &nbsp;4/114.3 &nbsp; +30 &nbsp; 205/55-16
16x8.0 &nbsp;4/114.3 &nbsp; +35 &nbsp; 225/50-16</td></tr></table><span id='postcolor'>

I would go for
16x7 215/50-16
16x8 235/45-16 or 16x7 215/50-16 to save a little money.

and I think 18" rims look great in s13 but performance is sacrified.