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Old 11-17-2006, 02:52 AM   #1
aboothman
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Default 06 WRX Wheels 17" vs 18" wheels

OK, so I ordered some Kosei KS T1 17"x8" with some 225/45YR-17 Bridgestone Potenza RE050A, but they are on backorder for another month, and I am getting the itch!! And NO, not from my last date

Besides, there are better looking wheels out there. They are sweet, and light, but there are other nice looking and light wheels out there.

I have been thinking about getting some 18" wheels, but it seems that there would be an even greater chance of rubbing, and I dont want to do any fender rolling.

I have Koni inserts with JDM STI pink springs. Car is only around an inch lower, but it DOES increase the chance of rubbing. I do not race my car at all, yet, so it is more of a looks and fun useage thing. However I do like the increased surface area of the wider tires, especially on some of the roads that I drive often up here in *real* Norcal


What I am asking is what wheel sizes, tire sizes, and offsets can/should I use without rubbing issues? I realize there are far less choices in 18s with the 5x100 lug, and 17s will be fine. I just want to explore my options since I have time to kill
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Old 11-17-2006, 07:32 AM   #2
Canonshooter
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I am really liking my Oz Ultraleggeras in 17 X 8 (48mm offset, 17.3 lbs. each). I'm running P225/45-17 size tires, but with the 8-inch wheel you could also consider 235/45, 235/40 and 245/40. I am having a set of P225/45ZR-17 Yoko Advan S4s installed today.

You can see some pics of my car here - http://members.socna.com/jim
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Old 11-17-2006, 12:58 PM   #3
waktasz
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Why can't people understand that it is the tire size that would affect rubbing/clearance, and not the wheel? When you get a larger wheel, you also get smaller profile tires.
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Old 11-17-2006, 01:58 PM   #4
aboothman
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maybe people would understand this if someone explained it......and maybe I DO understand this, but I do not know what limits I have with my current setup!!

MAYBE I want to hear what other people with similar setups have experienced.
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Old 11-17-2006, 03:18 PM   #5
Zalthras
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Quote:
Originally Posted by waktasz View Post
Why can't people understand that it is the tire size that would affect rubbing/clearance, and not the wheel? When you get a larger wheel, you also get smaller profile tires.
Not entirely true due to differences in offset.
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Old 11-17-2006, 03:29 PM   #6
waktasz
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Quote:
Originally Posted by Zalthras View Post
Not entirely true due to differences in offset.
If you are stupid and buy the wrong offset wheels then there is no helping you.
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Old 11-17-2006, 03:36 PM   #7
aboothman
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um, that ARE the correct offsets? Lets try something. Instead of playing the personal attack game, lets play the help the Op with his question game!!

Sorry for being cynical, but I am looking for answers. If I wanted to hear bickering I would watch daytime soaps
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Old 11-17-2006, 03:44 PM   #8
waktasz
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The answer is, if you buy wheels with the correct offset (53 to 48, generally), whether they be 16s or 20s, as long as the diameter of the tire stays close to stock, they will fit fine, as long as you don't go way too wide. A 235/40-18 on an 18x8 wheel with the proper offset will fit fine, for example.
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Old 11-18-2006, 09:14 AM   #9
FromageTheDog
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Quote:
Originally Posted by waktasz View Post
The answer is, if you buy wheels with the correct offset (53 to 48, generally), whether they be 16s or 20s, as long as the diameter of the tire stays close to stock, they will fit fine, as long as you don't go way too wide. A 235/40-18 on an 18x8 wheel with the proper offset will fit fine, for example.
Almost. Lower profile tires on larger diameter wheels will have a more square shoulder, which increases the potential for rubbing.

But in general, by staying with stock-ish offsets, stock overall diameter and by not "slamming" your car into oblivion (JDM pinks are definitely not a problem), you will avoid any rubbing issues.
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Old 11-18-2006, 11:41 AM   #10
aboothman
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ok, sweet. Thanks guys. So, does anyone know of a tire size calculator?

Also, does anyone have issues with 18x8.5s? Thanks
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Old 11-18-2006, 11:44 AM   #11
waktasz
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Here's a thread about 17x9s on iwsti... http://www.iwsti.com/forums/showthread.php?t=43568

It's good reading, I've been through the whole thing and it's what finalized my decision on getting 9" wide wheels.

Here's the tire size calculator I use, but remember, not all brands of tires will be exactly the same, so you should check their actual specs before you buy. THis thing is pretty close though. http://www.miata.net/garage/tirecalc.html
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Old 11-21-2006, 12:16 AM   #12
aboothman
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ok, so according to the Tire Calc, a set of 18x8s with 235x40x18s would be a little taller and wider than the stock 215x45x17s on the stock 17s, and the sidewall would only be .1" shorter. I want a strong wheel, that is lighter than stock. I like the look of the 18s, I just need a tire that will leave me some sidewall to protect the wheels on the road. Roads around here are not bad, but I would like to travel

I am sure that if 17x8s do not rub, there would only be a slightly greater chance of 18x8s rubbing since a 235x40x18 is only .8" taller than a 215x45x17. I still have plenty of room from the tire to the fender up front, and a little less in the rear, but I am sure it will not be an issue.

NOW, what are some good 18x8s that are strong (streetable), light, and good looking on a Black 06? Available from TireRack would help too

Last edited by aboothman; 11-21-2006 at 01:16 AM.
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