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Old 07-14-2015, 05:00 PM   #3901
bassler
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Quote:
Originally Posted by texascanuck View Post
The 255/35-18 tire size will be too short for your 2011 STi. It is 2.7% too small compared to the 2011 STi OEM tire (which is 245/40-18). Your old/current tires of size 245/45-18 are not the stock Sti tire size.

A 265/35-18 tire size is not the correct Sti tire size either ... BUT it is only -1.6% smaller which makes it a better choice than the 255/35-18 size.

In the STi with your short ratio 6-speed tranny you don't necessarily want to switch to a shorter tire.

BTW, this thread is for the WRX, not the STi.
you must be an engineer or something, insisting on precision...

outside of 3% difference either way should be avoided. the 255/35s are okay at -2.7%. wouldn't be 1st choice but its not my car.

why would STi or WRX for '11-'14 GRs matter aside from bolt pattern? he's looking for assistance and this is a good place to go for that on this topic. no need to pull the wrong thread card.
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Old 07-14-2015, 05:18 PM   #3902
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The heights of the tires differ on stock wrx and sti tires. Personally I prefer to stay within +/-2%. If using the OP as a guide, comparing how close your tire is to the referenced (stock wrx) tire, you can't since the sti is a different size. 245/40/18 is 25.7 tall while a 235/45/17 is 25.3 tall. That's only a 1.6% variance, but as I said, that makes the OP not feasible unless you're only judging if it will fit and not caring about the variance in tire size. Those who care about staying close to stock height will be thrown off if a bunch of guys posting about sti wheel and tire combos start chiming in.

Long story short, maybe he was trying to help when he said he was in the wrong thread
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Old 07-15-2015, 02:53 PM   #3903
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Quote:
Originally Posted by ThimWRX View Post
Long story short, maybe he was trying to help when he said he was in the wrong thread
I was .. but I can see how that can be taken the wrong way.

I also stick to the +/- 2% rule. Or some would prefer +/- 2.0000%

Note to newbies: When your tire diameters are outside of that range, the speedo and odo inaccuracy becomes more noticeable. But more importantly, your ABS and traction-control may not work optimally because those systems have been calibrated to work with your stock tire size.
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Old 07-17-2015, 11:14 AM   #3904
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I bought these rims from Mach V recently & had them do the install.
It was a long drive for me and the tech was a great guy. He worked thru his lunch break to get me back on the road !!!
http://www.fastwrx.com/products/rota-d-18x9-5-40-5x114
I really love the fitment
I did have to roll the rear fenders up a little even at stock ride height
Tires are 265x35x18




Last edited by 2.5sbd; 07-17-2015 at 11:21 AM.
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Old 07-18-2015, 08:14 AM   #3905
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Default Fitment for wheels on stock suspension

Hello all.. First time Poster.. Im lookin for some new rims.. And im hoping to keep suspension stock for daily driving and more for comfort.. and trying as much as possible not to roll the fenders... So just wondering if these wheel specs would suit the aesthetics without affecting handling too much.. as well tryna meet.. aforementioned needs..

XXR 527 18x8.75 Gold 5-100/offset[+35mm]

XXR 530 18x7.5 Gold 5-100offset[+38mm]

XXR 530 18x8.75 Gold 5-100/5-114.3 [+33mm] i know the offset shouldnt be too low as recommended by OP but just tryna get opinions

I have a 2011 wrx.. Would appreciate the opinions and advice guys.. Im noob lol.. Not even sure what to tire size to match just yet either
...
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Old 07-18-2015, 09:18 AM   #3906
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If you don't want to roll your fenders I'd use a bit less aggressive wheel or one not so wide.
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Old 07-18-2015, 03:39 PM   #3907
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Looking for BBS wheel caps for my 2013 STI. Can somebody give me a link please and thanx
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Old 07-18-2015, 04:07 PM   #3908
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Quote:
Originally Posted by Jack Sparrow View Post
Hello all.. First time Poster.. Im lookin for some new rims.. And im hoping to keep suspension stock for daily driving and more for comfort.. and trying as much as possible not to roll the fenders... So just wondering if these wheel specs would suit the aesthetics without affecting handling too much.. as well tryna meet.. aforementioned needs..

XXR 527 18x8.75 Gold 5-100/offset[+35mm]

XXR 530 18x7.5 Gold 5-100offset[+38mm]

XXR 530 18x8.75 Gold 5-100/5-114.3 [+33mm] i know the offset shouldnt be too low as recommended by OP but just tryna get opinions

I have a 2011 wrx.. Would appreciate the opinions and advice guys.. Im noob lol.. Not even sure what to tire size to match just yet either
...
I briefly owned a set of XXR 527 in 18x9.75 + 20 with 225/40/18 tires. I wasn't really a fan of the look and sold them a week later. Here are some pictures though.


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Old 07-20-2015, 09:43 AM   #3909
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Quote:
Originally Posted by soloz2 View Post
If you don't want to roll your fenders I'd use a bit less aggressive wheel or one not so wide.
&lt;br /&gt;<br />
&lt;br /&gt;<br />

Is 18x8.75 too wide? WRX stock is
17 x 8.. shouldnt that fitment be ok?this subie is running on 18 x 9.5 +38 offset and on stock suspension no fenders rolled.. So shouldnt mine be ok? Not sure of tires yet.. The place i went to suggested 225/40/18 for the stretched look... Thoughts?

http://forums.nasioc.com/forums/showthread.php?t=2680068&amp;page=3

Last edited by Jack Sparrow; 07-20-2015 at 10:15 AM.
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Old 07-20-2015, 10:20 AM   #3910
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Quote:
Originally Posted by xabre1200 View Post
I briefly owned a set of XXR 527 in 18x9.75 + 20 with 225/40/18 tires. I wasn't really a fan of the look and sold them a week later. Here are some pictures though. <br />
<br />
<img src="http://i58.tinypic.com/qnvd03.jpg" border="0" alt="" /><br />
<img src="http://i61.tinypic.com/2dc5px0.jpg" border="0" alt="" />
<br />
<br />
U runnin stock suspensions? I wanna get the 530's..for that concave look..

Last edited by Jack Sparrow; 07-20-2015 at 10:21 AM. Reason: Change of comment
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Old 07-20-2015, 12:14 PM   #3911
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Quote:
Originally Posted by texascanuck View Post
I was .. but I can see how that can be taken the wrong way.

I also stick to the +/- 2% rule. Or some would prefer +/- 2.0000%

Note to newbies: When your tire diameters are outside of that range, the speedo and odo inaccuracy becomes more noticeable. But more importantly, your ABS and traction-control may not work optimally because those systems have been calibrated to work with your stock tire size.
And this would explain why my ABS and Hill light and Traction control came on today? I have the 255/35/18 tires
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Old 07-21-2015, 10:28 AM   #3912
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18x9.5 +38 . 265/35/18 PSS

Rolled the rear.

DSC00974 copy by SLY_WRX, on Flickr
Avid.1 AV-20 18x9.5 +38 by SLY_WRX, on Flickr
Avid.1 AV-20 18x9.5 +38 by SLY_WRX, on Flickr
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Old 07-21-2015, 01:38 PM   #3913
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Quote:
Originally Posted by Jack Sparrow View Post
<br />
<br />
U runnin stock suspensions? I wanna get the 530's..for that concave look..
In that picture I believe I was on coilovers. I was only lowered about 2" lower than stock. If you want concave then you need to get the lowest offset wheel. You're going to need to stretch though...
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Old 07-21-2015, 05:09 PM   #3914
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Quote:
Originally Posted by joewrx628 View Post
I have the 255/35/18 tires
Your tire size is pretty close but not optimal at -2.7% approx.

Quote:
Originally Posted by joewrx628 View Post
And this would explain why my ABS and Hill light and Traction control came on today?
... and so you may have other issues. Try searching other threads. Good luck.

Last edited by texascanuck; 07-21-2015 at 05:59 PM.
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Old 07-21-2015, 06:10 PM   #3915
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I know nobody really cares But..
My 13 hatch is on rce blacks and I just put on 18x8.5 +32 offset cr Kai reps with 225-40-18 tires and there is no fitment issues at all. Everything is perfectly flush now, not "stanced" and feels good driving. So if anyone was wondering about a potential similar set up there ya go.
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Old 07-21-2015, 08:08 PM   #3916
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Will it fit question:

I've got a 2011 WRX currently with Avant Garde m310 +30 wrapped in falken 252 245/40/18, rolled all around with stock suspension. Am I safe to go with 255/35/18? The current tires aren't wide enough to protect the wheels.
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Old 07-21-2015, 09:53 PM   #3917
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Quote:
Originally Posted by xabre1200 View Post
In that picture I believe I was on coilovers. I was only lowered about 2" lower than stock. If you want concave then you need to get the lowest offset wheel. You're going to need to stretch though...
Hmm.. How does the handling feel? I guess ive decided to go for wheels with a higher offset as recommended by the OP so as not to affect the suspension geometry and accuracy of the speedo reading.. (speeding tickets in aussie bust ur savings wide open,so i can't afford not to know how fast im at)

However, do coilovers and springs help address those issues in setups with lower offsets?if not, what sort of modifications would one need to accommodate lower offset wheels to maintain handling amd suspension geometry?
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Old 07-21-2015, 10:28 PM   #3918
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Quote:
Originally Posted by Jack Sparrow View Post
Hmm.. How does the handling feel? I guess ive decided to go for wheels with a higher offset as recommended by the OP so as not to affect the suspension geometry and accuracy of the speedo reading.. (speeding tickets in aussie bust ur savings wide open,so i can't afford not to know how fast im at)

However, do coilovers and springs help address those issues in setups with lower offsets?if not, what sort of modifications would one need to accommodate lower offset wheels to maintain handling amd suspension geometry?
Handling was fine on coilovers. I'm on bags now though. You should be fine with 18x9.5 +40 if you get a narrow tire size. You may be fine with 255/35/18 on stock suspension.
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Old 07-21-2015, 10:30 PM   #3919
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Offset will not affect your speedometer.

And a wheel, no matter the diameter, width, and offset, cannot change suspension geometry.

Unless you are going to something less than +30, or more than +55 offest, you don't need to worry about the offset causing problems.
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Old 07-21-2015, 10:54 PM   #3920
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Quote:
Originally Posted by Annihilator817 View Post
Offset will not affect your speedometer.&lt;br /&gt;<br />
&lt;br /&gt;<br />
And a wheel, no matter the diameter, width, and offset, cannot change suspension geometry.&lt;br /&gt;<br />
&lt;br /&gt;<br />
Unless you are going to something less than +30, or more than +55 offest, you don't need to worry about the offset causing problems.
&lt;br /&gt;<br />
&lt;br /&gt;<br />
This is from another wrxtuner forum.. Quote from the OP.. I can link you if you want.. He advises everyone to stay as close to stock offset going no Lower than +40...here it is:

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

This quoted by the OP of this thread right here:
Secondly, as the offset gets lower your wheel centerline is getting farther and farther away from the axis of your steering. The steering feel gets messed up -- to me it feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering.

Last edited by Jack Sparrow; 07-22-2015 at 10:27 AM.
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Old 07-22-2015, 10:39 AM   #3921
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Quote:
Originally Posted by younoleit View Post
Will it fit question:

I've got a 2011 WRX currently with Avant Garde m310 +30 wrapped in falken 252 245/40/18, rolled all around with stock suspension. Am I safe to go with 255/35/18? The current tires aren't wide enough to protect the wheels.
Anyone? Help?
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Old 07-22-2015, 10:48 AM   #3922
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Well you're only going like 5mm wider on each side and the sidewall is going down by ten proportionately so it's probably gonna be fine if you fit now. Ask the shop mounting them if you can switch them if they don't fit
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Old 07-22-2015, 06:30 PM   #3923
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Quote:
Originally Posted by Jack Sparrow View Post

&lt;br /&gt;<br />
&lt;br /&gt;<br />
This is from another wrxtuner forum.. Quote from the OP.. I can link you if you want.. He advises everyone to stay as close to stock offset going no Lower than +40...here it is:

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

This quoted by the OP of this thread right here:
Secondly, as the offset gets lower your wheel centerline is getting farther and farther away from the axis of your steering. The steering feel gets messed up -- to me it feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering.
Wheel rates can change, although definitely not drastically enough to cause issue, but the suspension geometry cannot change by simply bolting a wheel onto the car.

The control arms, the strut, the knuckle, your tie rods, will all maintain the same geometry whether you have four 3 inch wide donuts, or four 10 inch wide wheels with no backspacing on your car.
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Old 07-22-2015, 08:40 PM   #3924
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offsets are a hard concept to understand for most noobs.

you need to adjust offset to account for wider or narrower wheels. this keeps the centerline of the wheel in the same relative spot as OEM despite having a different number.
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Old 07-22-2015, 11:59 PM   #3925
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Quote:
Originally Posted by sc00by4life View Post
offsets are a hard concept to understand for most noobs.
Hmm. See below.

Quote:
you need to adjust offset to account for wider or narrower wheels. this keeps the centerline of the wheel in the same relative spot as OEM despite having a different number.
NO. If the offset is the same, the centerline of the wheel is in the exact same place. Offset is the distance from the centerline of the wheel to the mounting flange. The width does NOT change where the centerline of the wheel is at a given offset.

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