Wheel / Tire FAQ - Page 4 - Subaru WRX Forum
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post #46 of 55 Old 03-13-2012, 10:25 PM
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brfatal,

actually, tried that. Put 215/55R17s on. They rubbed the wheel wells on the rear, not always, just big bumps.
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post #47 of 55 Old 04-24-2012, 10:08 AM
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I just have a quick question, I have a 2010 WRX and I have a set of Rims that used to be on my 95 Talon TSI AWD, they are 16"x7 offset +38mm tire size is 225/50 R16 the diameter seems okay but the offset is way lower than stock, I was just wondering if I mounted those and used them if any problems would occur and would handling be better or worse? From what I was told handling would be better cause the wheels would be further out and it would ride a bit wider. Please let me know if any of its correct. Thanks!
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post #48 of 55 Old 04-24-2012, 10:30 AM
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If the are the correct bolt pattern, the offset is too low and the wheels are narrower than stock. This will reduce tire options and hurt performance. Don't.
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post #49 of 55 Old 04-24-2012, 11:36 AM
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DSMs use a different bolt pattern

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post #50 of 55 Old 04-24-2012, 10:29 PM Thread Starter
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Wider suspension is better, but changing wheels doesn't change the suspension. The best offset is the stock offset because it's the offset for which the suspension was designed to work. Reducing offset to "widen" the stance of the car does not generally improve handling. The suspension geometry is adversely effected. To correctly widen the track of the car, the suspension would need to be modified. And not just by changing parts, the entire geometry would need to be redone.

2015 STi: Still Stock
04 STi, 04 WRX: SOLD
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post #51 of 55 Old 12-11-2014, 09:11 PM
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Hi.
Fender clearance. Will I have enough? It seems pretty close.
2011 subaru impreza 2.5i premium
OEM was
Tires, 205/55/16. Rim, 16x6.5 offset +55
Aftermarket now
Tires, 225/45/17. Rim, 17x7.5 offset +48
Thanks for any info/opinions.
I can't wait for some snow this year! (In Chicago)
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post #52 of 55 Old 12-12-2014, 08:11 AM Thread Starter
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no you won't have any trouble with that setup assuming the wheels are made for a Subaru (5x100, correct center bore, lug nut shape)

2015 STi: Still Stock
04 STi, 04 WRX: SOLD
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post #53 of 55 Old 12-13-2014, 09:45 PM
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Quote:
Originally Posted by basco View Post
DSMs use a different bolt pattern
Wow I'm
Late on this, 95 TSI used a 5x100- 2010 Wrx used a 5x100

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post #54 of 55 Old 04-01-2015, 02:51 PM
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Quote:
Originally Posted by mosc View Post
Wider suspension is better, but changing wheels doesn't change the suspension. The best offset is the stock offset because it's the offset for which the suspension was designed to work. Reducing offset to "widen" the stance of the car does not generally improve handling. The suspension geometry is adversely effected. To correctly widen the track of the car, the suspension would need to be modified. And not just by changing parts, the entire geometry would need to be redone.
New member here....Hello!!

Mosc: Great information man! Thanks!!
I noticed you have a 2015 sti...still stock. I was wondering if you were looking for wheels tire combo right now what would you choose, based on all the infor you have given us, I am curious to see what you would choose. I am new to the subaru world and mods, so I really appreciate all of this info and your input.

Thanks!!
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post #55 of 55 Old 04-01-2015, 03:57 PM Thread Starter
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My situation? I am sticking with the stock 18x8.5" +55 wheels (cause they're free and nobody would give me decent money for em thanks to their mediocre stock tires) and I bought a set of 07 STi wheels (17x8" +53 clear brembos 5x114) to use in the winter with 245/45R17 Pirelli Winter Sottozero 3. That's not exactly the question you're asking though.

What would I buy for the track? The 08-14 STi could handle 265 width at near stock offset without fender rolling or hitting the strut. You can't find that width for a 17" wheel so if I was going to get new tires/wheels I'd be looking at an 18x9" or 18x9.5" wheel that cleared brembos and had basically as much offset as I could get. If you could find say 18x9" +48, I think you could run 265/35R18 and clear the fenders. The 2015 is new but the fender clearance appears to be somewhat similar. I think on the 2015 you could do the same.

The negative there is the tire height. The stock height is 25.7" and the STi's gearing is overly tight. 265/35R18 is just 25.3". I'm actually considering 255/40R18 on the stock wheels though strut clearance at that height (26.0") at +55 offset worries me. I'd actually prefer 255/45R17 if I could find and afford 17x8.5" +48 5x114 wheels and they made a decent tire in that size (which they don't so it's moot). 275/35R18 seems to fix everything but it's awful wide and requires an awfully wide wheel which I can't imagine having an offset that wouldn't make me puke. Also not sure how the fenders would handle it. 18x9.5" decent offset wheels and 275/35R18 tires is not a cheap option either. Or a nimble one for agility on public roads dodging potholes.

So all that said 245/40R18 on 18x8.5" +55 isn't all bad even if stock doesn't sound very ideal to most people.

The WRX, in all it's years, is a different balance of tire width, wheel offset, fender clearance, gearing, and brake clearance so keep that in mind if your car isn't exactly mine. For example, the 02-05 WRX came with 16x6.5" +53 wheels and 205/55R16 all season 25" tall tires on overly tall gearing. The difference going to a performance summer tire that was 235 wide and shorter (235/45R17) was biblical. The fenders were the same as the JDM STi to boot, which was 235 wide stock. 17x8" +48 to +55 offset 5x100 wheels are cheap and easy to find as well so there was no reason NOT to do it. As I said, my 2015 STi isn't going to easily slap on 30mm more width from a far superior tire for little money and no clearance issues like an 02-05 WRX could. It's pushed already.

2015 STi: Still Stock
04 STi, 04 WRX: SOLD
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