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Old 09-25-2013, 04:39 PM   #2326
Digitalwave
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Originally Posted by Splatt2083 View Post
Not flush as in further into wheel well or further out of wheel well? Thanks
Further into the wheel well, as in in the tires might rub on the strut.
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Old 09-25-2013, 05:49 PM   #2327
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Originally Posted by Splatt2083 View Post
Not flush as in further into wheel well or further out of wheel well? Thanks
Further in. The larger the number the further into the wheel well. The lower the number the further out. Offset is mms that the center of the wheel is from the hub. A zero offset, the center of the wheel would be dead center on the hub/brake disc. (More lip) a +38 would mean the center of the wheel is 38 mm off center to the car. A +48 would be 10mms further toward center. It is "offset" from center. This is why different widths with the same offset sit different. Because offset is from center.
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Old 09-25-2013, 06:55 PM   #2328
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Just for reference, the link below is an sti with 18x9 +63. Which is 12mm further in than a 18x9.5 +45 or 9mm further in than a 18x9.5 +48. I don't know how much the strut clearance varies on the GR WRX vs GR Sti but with minimal negative camber I'd guess you'd be ok.

http://www.iwsti.com/forums/gr-tires...ring-rf-2.html
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Old 09-25-2013, 07:10 PM   #2329
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Originally Posted by jlundy11 View Post
Just for reference, the link below is an sti with 18x9 +63. Which is 12mm further in than a 18x9.5 +45 or 9mm further in than a 18x9.5 +48. I don't know how much the strut clearance varies on the GR WRX vs GR Sti but with minimal negative camber I'd guess you'd be ok.

http://www.iwsti.com/forums/gr-tires...ring-rf-2.html
yeah looks like either 0 or positive camber on those pics....NOT safe. not to mention those most likely won't clear coilovers, and guys have difficulty fitting wider tires on the OEM bbs with a "sport" alignment.

realistically, there is such an assortment of wheels in the low to mid 40's that fit without issue, that an offset that high should not be considered.
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Old 09-25-2013, 07:36 PM   #2330
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Originally Posted by sc00by4life View Post
yeah looks like either 0 or positive camber on those pics....NOT safe. not to mention those most likely won't clear coilovers, and guys have difficulty fitting wider tires on the OEM bbs with a "sport" alignment.

realistically, there is such an assortment of wheels in the low to mid 40's that fit without issue, that an offset that high should not be considered.
Are you referring to my +48 or the + 63 he posted?
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Old 09-25-2013, 08:51 PM   #2331
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yeah looks like either 0 or positive camber on those pics....NOT safe. not to mention those most likely won't clear coilovers, and guys have difficulty fitting wider tires on the OEM bbs with a "sport" alignment.
I don't know which coilovers you're referring to but mine gave me more inner clearance. And the Sti in the link is stock alignment and stock 245/40R18 tires. I personally think a +63 is retarded as well but like I was saying, this was just for reference.

Sidenote: I have seen guys running 18x9.5 +45 with 255/35R18 and -1.5 camber
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Old 09-25-2013, 09:04 PM   #2332
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I don't know which coilovers you're referring to but mine gave me more inner clearance. And the Sti in the link is stock alignment and stock 245/40R18 tires. I personally think a +63 is retarded as well but like I was saying, this was just for reference.

Sidenote: I have seen guys running 18x9.5 +45 with 255/35R18 and -1.5 camber
Coilover shock body is thicker than OEM struts. Not to mention depending on ride height and preload settings, the spring collars can get in the way.

The reason you can gain clearance with coilovers is through the use of camber plates which will actually angle the strut vs the hub (like with bolts).

This is all based purely on how they're setup though.
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Old 09-25-2013, 10:01 PM   #2333
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I have a 2013 WRX and I'm trying to figure out if a set of 225/50/17 Tires on 7-8" wide wheels will fit (stock is 235/45/17). I read the stickies and this thread but I just want to make sure before I spend a couple hundred bucks. It doesn't seem like a huge difference but the calculator I'm using says the tires will fill out the wheel well by an extra 7mm. This should fit, right?

Thanks
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Old 09-25-2013, 10:08 PM   #2334
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sure it'll fit, but a 225/45 would be better.
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Old 09-25-2013, 11:03 PM   #2335
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The general rule is that you dont want to bemore than 3% taller or shorter thank stock
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Old 09-25-2013, 11:13 PM   #2336
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The general rule is that you dont want to bemore than 3% taller or shorter thank stock
Why is this?
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Old 09-26-2013, 11:12 AM   #2337
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The general rule is that you dont want to bemore than 3% taller or shorter thank stock
MY general rule is to stay within 2% of stock, and I have heard many more people use 2% as a guideline.

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Why is this?
For a couple reasons. First, if you change tire diameter your speedometer and tachometer will be off by the same amount, and after 2% it starts to be enough to actually be a nuisance.

Secondly, you're changing the car's final drive by the same amount, which will affect cruise RPMs, mileage, and driving behavior.

Finally, if the tires get too small you are losing ground clearance, and if they get too big in diameter you are risking contacting the bodywork.

SO: Generally speaking, if possible, stay within 2% of the factory diameter.

Now, one thing to keep in mind is that the GR/GV WRX and STI cars share the same chassis and bodywork, but the WRX comes with a smaller stock tire than the STI. (WRX = 235/45R17 = 25.3" diameter; STI = 245/40R18 = 25.7" diameter, 1.5% taller.) So you know there's at least 1.5% of headroom on the WRX in terms of up-sizing. I don't think I'd go much taller than that STI tire, though.

--Dan
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Old 09-26-2013, 11:51 AM   #2338
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Originally Posted by Mach V Dan View Post
MY general rule is to stay within 2% of stock, and I have heard many more people use 2% as a guideline.

For a couple reasons. First, if you change tire diameter your speedometer and tachometer will be off by the same amount, and after 2% it starts to be enough to actually be a nuisance.

Secondly, you're changing the car's final drive by the same amount, which will affect cruise RPMs, mileage, and driving behavior.

Finally, if the tires get too small you are losing ground clearance, and if they get too big in diameter you are risking contacting the bodywork.

SO: Generally speaking, if possible, stay within 2% of the factory diameter.

Now, one thing to keep in mind is that the GR/GV WRX and STI cars share the same chassis and bodywork, but the WRX comes with a smaller stock tire than the STI. (WRX = 235/45R17 = 25.3" diameter; STI = 245/40R18 = 25.7" diameter, 1.5% taller.) So you know there's at least 1.5% of headroom on the WRX in terms of up-sizing. I don't think I'd go much taller than that STI tire, though.

--Dan
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ive heard that going with a shorter tire will benefit the wrx owners how is that? is the gearing going to be shorter also resulting in faster acceleration since our gears are much longer than sti?
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Old 09-26-2013, 12:01 PM   #2339
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ive heard that going with a shorter tire will benefit the wrx owners how is that? is the gearing going to be shorter also resulting in faster acceleration since our gears are much longer than sti?
it will have the same effect of shorter ratio, yes.
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Old 09-26-2013, 09:11 PM   #2340
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2012 WRX hatch
Suspension: stock everything
Wheels: Miro 111 (machined silver finish)
- size: 18x9.5
- offset: +40
Tires: Yokohama Avid 255/35/R18
Fenders: no roll or pull

So far no rubbing, but we'll see!

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Old 09-26-2013, 09:45 PM   #2341
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18x9.5 +35 rota G force wheels with 245 45 18 tires stock suspension rear fenders had to be rolled but not rubbing after that.
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Old 09-26-2013, 11:06 PM   #2342
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Great thread!

I'm planning on going with a spring/shock combo. Possibly Koni Inserts with swift springs, or billstien shocks with swift springs. (STill haven't nailed it down)

I plan to get the suspension dialed in before I make a final wheel choice, but I'm generally curious about enkeis.

I really like the RPF1's

What's the general consensus on wheel size with this wheel on lowered cars? I've seen 17x9 et35 as a common place, but I want to avoid rolling fenders. Would 17x9 or 18x9 (et35) cause any rubbing on the fender with a spring/shock combo if the fenders are not rolled?
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Old 09-26-2013, 11:31 PM   #2343
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Originally Posted by MileyCyrusTWRX View Post
Great thread! I'm planning on going with a spring/shock combo. Possibly Koni Inserts with swift springs, or billstien shocks with swift springs. (STill haven't nailed it down) I plan to get the suspension dialed in before I make a final wheel choice, but I'm generally curious about enkeis. I really like the RPF1's What's the general consensus on wheel size with this wheel on lowered cars? I've seen 17x9 et35 as a common place, but I want to avoid rolling fenders. Would 17x9 or 18x9 (et35) cause any rubbing on the fender with a spring/shock combo if the fenders are not rolled?
Depends on what kind of tires you put on there. I had 245 40 18s on a 18x8.75 et35 had rubbing in the rear.
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Old 09-26-2013, 11:34 PM   #2344
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Depends on what kind of tires you put on there. I had 245 40 18s on a 18x8.75 et35 had rubbing in the rear.
Just what I needed to know. THanks for the info. I'll have to do some more digging.
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Old 09-26-2013, 11:37 PM   #2345
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Just what I needed to know. THanks for the info. I'll have to do some more digging.
I did a minor roll and it stopped. Don't be scared about rolling your fenders. Go to a shop that does it right and you will be fine. Make sure they heat the paint and it will all be good I have had no issues with my paint
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Old 09-27-2013, 10:17 AM   #2346
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Originally Posted by MileyCyrusTWRX View Post
Great thread!

I'm planning on going with a spring/shock combo. Possibly Koni Inserts with swift springs, or billstien shocks with swift springs. (STill haven't nailed it down)

I plan to get the suspension dialed in before I make a final wheel choice, but I'm generally curious about enkeis.

I really like the RPF1's

What's the general consensus on wheel size with this wheel on lowered cars? I've seen 17x9 et35 as a common place, but I want to avoid rolling fenders. Would 17x9 or 18x9 (et35) cause any rubbing on the fender with a spring/shock combo if the fenders are not rolled?
A 9" ET35 with 245 or 255 tires would almost definitely need at least a light roll in the rear.
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Old 09-30-2013, 02:58 PM   #2347
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I have 18x9.5 et 38 with stock suspension and a rear fender roll, and I have no issues. I've tracked my car @ summit point main(Jefferson circuit) as well I just got home from VIR and had no issues there. I run a 255x35 re11's pretty square set up.
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Old 10-04-2013, 01:00 AM   #2348
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So im going with a 18x8 but cant decide on offset.. The wheel im getting comes in +35 or +48.. I kind of want the 35 but if this is going to compromise anything negatively or hurt anything i dont want to do that.. Any quick input?
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Old 10-04-2013, 10:45 AM   #2349
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So im going with a 18x8 but cant decide on offset.. The wheel im getting comes in +35 or +48.. I kind of want the 35 but if this is going to compromise anything negatively or hurt anything i dont want to do that.. Any quick input?
The +48 will sit almost exactly like stock (completely sunken), it's the same width and only 5mm more offset. The +35 will work fine and at least provide some visual offset change.
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Old 10-04-2013, 10:48 AM   #2350
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The +48 will sit almost exactly like stock (completely sunken), it's the same width and only 5mm more offset. The +35 will work fine and at least provide some visual offset change.
Whats your vote?
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