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03-25-2011, 11:58 AM | #1 |
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Guide to fitting wheels and tires to the 2011-2014 WRX
The 2011-2014 Subaru WRX has great big bulged out fenders, just like the STI has had since 2008. We've been getting a lot of questions about wheel and tire fitment on these cars, and I've seen a lot here on NASIOC, so I thought I'd address it.
The bigger bodywork allows for the fitment of wider wheels and tires. Wider tires look cool, and more importantly, they can help generate a lot more lateral grip. HOWEVER, a lot of the questions I get are asking about fitments that are either too low of an offset, too wide of a tire, or some combination of the two. Oh, and there's the bolt pattern problem, too. First off, some basics: The WRX has a bolt pattern of 5x100 and a hub bore of 56.1mm. The stock wheel is a 17x8" +53 offset with a 235/45R17 tire. That tire size means the stock tire has a diameter of 25.3". That 5x100 bolt pattern means factory STI wheels WILL NOT fit, since the STI uses a 5x114 bolt pattern. Now, if you want to fit larger/wider wheels and tires, you'll want to try to keep the wheel offset as close as possible to stock. I'd generally try for an offset near the stock +53. +48 is very common. Depending on how wide the wheels and tires are, though, the offset will have to go lower, or the tire may bump into the strut in the front. From experience, a 9.5" wide wheel will work at around +40 (give or take a couple of mm). The lower offset allows decent tire clearance on the inside. Steering feel is slightly worse from the lower offset, but it's not terrible. A 265/35R18 tire happens to be within 0.1% of the stock size, and that fits pretty well. (You may have to do minor fender rolling at the back if the car is lowered. It depends on the tire...not all 265/35R18 are created equal.) Here's an example of this fitment: 18x9.5 +38 Rota Option, 265/35R18 Michelin Pilot A/S The car above is lowered on Epic Engineering springs. We rolled the rear fenders. 18x9.5 +40 Rota D-Force, 265/35R18 Kumho V700 That's our shop car above. Rear fenders rolled, lowered on Cusco coilovers. If you still want more meat under the car, you can run a 275 width. We've done several cars with 275/35R18. That's a tight squeeze if the car is lowered. Rolling is definitely required in back. 18x9.5 +40 Rota D-Force, 275/35R18 Dunlop Direzza Z-1 Star Spec The gray car has Swift lowering springs. Our shop car with Rays G-Games 99B 19x9.5 +40, Cooper 2XS 275/30R19. We have not yet tried 285/35R18, for a couple of reasons. One is that the tire is 2.1% larger than the stock 2011-2014 WRX tire, slightly over our 2% rule of thumb in terms of variance from stock. The other reason is that since the diameter grows along with the width, the clearance problem will get worse. I think that tire would rub at all four corners with any amount of lowering or suspension compression. I realize I've used some STI cars as examples above, but the WRX bodywork is identical, so for our purposes these are still useful comparisons. If you want absolutely NO fitment problems, go with a smaller tire, like a 255/35R18. Given an offset between about +40 to +48, there should be no rubbing, even when mildly lowered. Stock STI tires, which are 245/40R18, are also an easy fit. I mentioned rolling the rear fenders. Customers often ask me about rolling the fronts. They usually do not need to be rolled, but even if you wanted to there's almost no lip up there to roll, and what lip is there incorporates clips that secure the fender liner to the fender. Get rid of those clips and your fender liner is going to have to go. We suggest retaining your fender liners. They keep road debris and moisture out of your car's inner bodywork. Note that the bigger tires may rub bit of the rear bumper cover. We trimmed that back on some of the cars with 275/35R18 tires. I see some people with the widebody cars running lower offsets, sometimes much lower, like +30 or +25. I DO NOT recommend doing this. Sure, it looks kind of cool (if that's your thing), but generally you are going to have to go with a SMALLER tire size to alleviate fender contact problems. What's the point of having big wide wheels if your contact patch is the same as stock? 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. So, that's my experiences with stuffing big wheels and tires onto the 2011+ WRX. I hope this provides some help when you are shopping for wheels and tires. --Dan Mach V FastWRX.com Last edited by Mach V Dan; 05-04-2017 at 12:27 AM. |
03-25-2011, 02:11 PM | #2 |
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Nice write up, and nice shop cars! Seems like 9.5 wide +40 with 265 tires is the way to go. Have you guys stuffed in 285s on anyone's ride yet?
At one point you mention offsets between +48 and +48..... you mean 48 and 40? |
03-26-2011, 08:44 AM | #3 | |||
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Thanks.
Quote:
Quote:
Quote:
--Dan Mach V FastWRX.com |
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03-26-2011, 12:26 PM | #4 |
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Thanks for this thread Dan!
Now let's see if people use it. |
03-26-2011, 02:16 PM | #5 |
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Nice post! Puts my worries to rest looking for summer wheels at the 18x9.5 size!
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03-28-2011, 03:09 AM | #6 |
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I want to run 18x10 grids with 255 or 265 Federal 595 RS-R but the 18x10 wheels only come in +30 offset. The car will be on BC BR coils. What you you think of this setup, Dan? Are you avoiding 10" wheels for a reason? I want no rub, minimal to no stretching, and a 2-3 finger gap. Is my setup possible? Or should I settle for a 9.5?
Oh and the RS-Rs run a little wide. A 255 is 260mm wide and a 265 is 271mm wide. Thanks! |
03-31-2011, 11:02 AM | #7 | |||
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Quote:
Quote:
Quote:
--Dan Mach V FastWRX.com |
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03-31-2011, 04:42 PM | #8 | |
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03-28-2011, 01:55 PM | #9 |
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Great write up, easy basic breakdown. I hope people use it as well.
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03-28-2011, 04:05 PM | #10 |
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Anybody else running 18x9. +35 g-forces on a 2011 wrx?
Just as the title states. I'm running this set up with 245/40/18 and wanted to ask some people if they are having similar "rubbing" issues as I am on the front end.
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03-28-2011, 05:05 PM | #11 | |
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Quote:
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03-29-2011, 12:37 AM | #12 |
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Thanks for the info!
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03-29-2011, 02:16 PM | #13 | |
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03-31-2011, 03:50 PM | #14 |
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Just the thread I needed as I'm thinking of putting 265/35/18's on a set of Ultraleggras 18x9 stock offset with the stock STI SE suspension. I completely want to avoid rolling fenders.
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03-31-2011, 04:41 PM | #15 | |
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Quote:
--Dan Mach V FastWRX.com |
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03-31-2011, 05:01 PM | #16 | |
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08-29-2016, 10:12 PM | #17 | |
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Subie sti 2011
Quote:
Last edited by Starpak; 08-30-2016 at 03:03 AM. |
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09-06-2016, 04:09 AM | #18 |
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It'd be safer to go with stock STI tire size (245/40) or 255/35 if you want to avoid fender rolling. If you go with 265/35, only the rear fenders need rolling (not pulling).
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09-11-2016, 08:52 PM | #19 |
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Does anyone have experience with 17x9 +45 rpf1 and the 2006 4pot calipers? I had a bad OEM brake hose which was causing a caliper to stick randomly. I purchased SS lines and the 06 4 pot calipers (ya know just incase my calipers where shot... thats how i justified it to the girlfriend) So i swapped out the affected front brake hose with a SS one as well as the other side. All problems solved. Now i have these beautiful calipers sitting next to me and I don't know if they will fit my rpf1. I seem to keep finding conflicting information everywhere
Last edited by pboy1984; 09-12-2016 at 08:58 AM. |
03-31-2011, 09:26 PM | #20 |
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2011 WRX 18x7.5 +38 PF01 Questions
Please forgive my ignorance. Hopefully someone can chime in and set me straight on why this fitment would be a *bad* idea. I really like this wheel but unfortunately the 5x100 fitment options are terribly limited. I can wait around for a group buy on custom sizes, sure - but is it necessary? I'm not looking for herrafrush, but I don't want my wheels to turtle into the fenders after it is dropped. This seems like a fairly decent compromise with the low offset but narrow dimensions. I have searched a bit and can't seem to find any 2011s with a similar fitment. I would hope to get 245s on there. Even though 255s were my original goal, I just don't see 255s on a 7.5" wheel working to my advantage. Again, please correct me if I am wrong. My car is not going to be a "track whore", "show car", or any other stereotypical build. I intend to drive it daily, possibly hit the track to see how I like it, but otherwise just a modestly built, reliable daily driver. CF: Are these wheels going to suck into the fender since they are so narrow even though the offset is on the lower side? Am I losing anything other than tire options but going with this wheel? *Bonus*: If anyone has a picture of a 08+ STI or 2011 WRX with similar fitment, they are most definitely welcome! Last edited by ksj1831; 03-31-2011 at 10:05 PM. |
03-31-2011, 10:18 PM | #21 |
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merged ksj1831's thread with this one
Last edited by nhat; 03-31-2011 at 11:22 PM. |
04-01-2011, 09:07 AM | #22 | ||
NASIOC Vendor
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Quote:
Quote:
--Dan Mach V FastWRX.com |
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03-31-2011, 09:31 PM | #23 | ||
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Nice to see an intelligent thread about wheel/tire fitments for a change here. I guess i'll keep my STI after all.
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04-01-2011, 03:01 PM | #24 |
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Looking and feeling up my car at the front there's more room than in the back. According to the tire calc the diameter is about .4 inches less and a touch wider. I'll report back when I get this done.
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07-03-2013, 03:01 PM | #25 |
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18x9.0 on PSS 265/35 on GR STi
Hey Dan,
Awesome thread. I've been through it in its entirety, but it seems examples and pics of this setup have been very sparse. I know 9.5 would be ideal, but the WedsSport I am looking at only comes in 9 and 10. Could do 255/35 but would like to stay closer to stock diameter. What do you think? 265 too much tire for a 9? Thanks, Mike |
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