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Old 10-11-2020, 06:12 PM   #8526
Raccoon WRX
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Originally Posted by Avenir1107 View Post
Wheel noob here.



How will a 18x9.5 +22 with 265/45 fit on stock suspension?



Also why is it rare to see 265/45 tires? Seems like everyone with 265 runs 35


+22 is too aggressive and will likely rub. (Even more so for the guy asking about +10 above)

The reason everyone with 265 goes with 265/35 is because it is the closest to OEM diameter on the 18x9.5. But. Youíll want to go with higher offset especially if you plan on lowering, I think it was +41 for no rub, but donít quote me on that.
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Old 10-14-2020, 06:55 PM   #8527
ITguy6158065
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2019 STI

Would I be able to run the Aodhan DS07's 18x8.5 +35? I'd probably want to pair them with something like a 255/40R18. My only concern is the 6 pot brakes.
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Old 10-26-2020, 02:43 AM   #8528
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So I read most of this forum, as well as other places than this. I have a 2020 wrx with the performance package. Wheels im looking at are enkie tms 18x9.5 + 38 which I know will fit. I have a set of silvers coilovers i bought off a buddy, and i plan on throwing them on the car after the winter. Now i only plan dropping the car at 1 inch ( he had his at 2.5 ) to not be slammed since western pa has crap roads. I see a lot of people running 255/35 and 265/35. Tires im looking at are the indy 500's. Torn between the two sizes. I am willing to have the rears rolled if needed.
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Old 11-05-2020, 01:02 AM   #8529
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Originally Posted by Thebookvol1 View Post
So I read most of this forum, as well as other places than this. I have a 2020 wrx with the performance package. Wheels im looking at are enkie tms 18x9.5 + 38 which I know will fit. I have a set of silvers coilovers i bought off a buddy, and i plan on throwing them on the car after the winter. Now i only plan dropping the car at 1 inch ( he had his at 2.5 ) to not be slammed since western pa has crap roads. I see a lot of people running 255/35 and 265/35. Tires im looking at are the indy 500's. Torn between the two sizes. I am willing to have the rears rolled if needed.
I'm on 18x9.5 +38 TE37s with 255/35 indy 500s lowered on HKS hipermax gt ivs right out of the box (roughly 1" drop all around) and I have zero rub even with 4 adults. My alignment specs are -1.5 in the front and -2.5 in the back. If I could do it again, I'd do 265/35 for a meatier tire look.
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Old 11-19-2020, 09:35 PM   #8530
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I'm on 18x9.5 +38 TE37s with 255/35 indy 500s lowered on HKS hipermax gt ivs right out of the box (roughly 1" drop all around) and I have zero rub even with 4 adults. My alignment specs are -1.5 in the front and -2.5 in the back. If I could do it again, I'd do 265/35 for a meatier tire look.
Ok so the rear lca's im looking at maxes out at +- 2 degrees of camber, looking to get adjustable toe arms too. Would that be enough negative camber for a 265? I know that 255's will fit for its what my buddy had on his. 265 would be nice for a meatier look if it'll fit without rubbing in the back.
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Old 11-25-2020, 12:23 PM   #8531
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sold the advan tc3, new setup 275/35 ar1 and tc105x 9.5 35, 10mm spacers in the front so 25.





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Old 12-04-2020, 02:40 PM   #8532
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You have to look at more than just 'XL' and 'SL'. Basically, what you need to be doing is matching the rated load of your OE tires at their recommended inflation pressures. For the 2015-up WRX, I think the OE tires are 245/40-18, 97 in XL, and the inflation pressures are 33/32 psi.

After that it gets a little more complicated. The 255/40-18 is a 95 in SL, which actually corresponds to a 99 in XL (larger than OE). The 255/35 is a 94 in XL and is a slightly smaller tire than OE in terms of load capacity. In either case, you'd want to set inflation pressures slightly different from Subaru's 33/32. You could actually drop about 2 psi off of the door sticker number for the 255/40's, but you'd have to add about 4 psi for the 255/35's. Three load index numbers worth of correction is as far as I'm normally willing to consider.

Reinforcement is more for the XL tires being rated to 42 psi vs the SL tires to only 36 psi. I suspect any handling benefit would be mostly incidental.


Norm
Norm are you able to tell me the correct pressure for 265/35/18 97XL should be? The tire is the Achilles sport 2 I keep seeing some threads saying to reduce the pressure by about 2psi from stock but other places saying it should be anywhere from 35-40 psi cold for optimal handling.
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Old 12-05-2020, 09:40 AM   #8533
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Norm are you able to tell me the correct pressure for 265/35/18 97XL should be? The tire is the Achilles sport 2 I keep seeing some threads saying to reduce the pressure by about 2psi from stock but other places saying it should be anywhere from 35-40 psi cold for optimal handling.
Same as for the 245/40-18 97XL, if you're simply matching the OE load capacity @ inflation, which I suspect would be 33 front/32 rear. Cold.

But there is a little "wiggle room" to adjust things more to your liking. Handling tends to get a bit more "crisp" with a couple psi more psi (especially up front), and it at least seems you can dial a little of the on-throttle understeer out of the car by running the pressure stagger the other way around with the higher pressure in the rear tires (i.e. 33-34f/35-36 r). Again, cold, and I'm only talking about street driving here. It's still experimental on your part, and you may like it, or you might not. Certainly on the street, personal preferences in handling feel matter more than the last 0.05 or even 0.1g that you never get to anyway.

I haven't taken the WRX to a track day yet (and probably won't, as that's what the other car is for), so for the above I'm only looking at moderately enthusiastic street-ish cornering g's here (0.6, maybe 0.7) rather than track (1.0+).

If you're truly chasing optimal cornering for driving out near the limits of car capability, it's really the hot pressures that you need to be interested in, because that's the pressures that they'll actually be operating at. 35 - 38 psi or so hot is probably a good range to shoot for, which means that the cold pressure would be a few psi less. Obviously, hot pressures take individual experimentation to determine.

Tires can easily gain 5 or more psi during an HPDE session or even a couple of autocross runs. And FWIW I'm sure that Subaru and all the rest make some assumptions concerning cold to hot pressure rise in the recommendations printed on the sticker. I'd be badly disappointed if they didn't.


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Old 12-12-2020, 09:35 AM   #8534
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Thinking of trading my 11 STi for a 20. I have 18x9.5 +40 Gramlights on KWV3(previously yellows) with 265/35/18 mpss. They fit with a rear fender roll.

Is the fitment the same on the 2020/ VA chassis? I want to keep my wheels and tires.
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Old 12-13-2020, 09:30 AM   #8535
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Might be close. You're looking at the outsides of the tires and wheels being about an inch further out (more "flush").




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Old 12-16-2020, 12:09 AM   #8536
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i picked up a set of enkei RPF1's 18x9.5 +38 for my 2020 sti, ive seen some people fit them with out spacers. can anyone confirm that or have pics without spacers.
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Old 12-28-2020, 12:41 PM   #8537
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For a 265/35-18 tire, any recommendation on a wheel that would fit with stock suspension on a 2017 wrx sti?
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Old 12-30-2020, 03:11 PM   #8538
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Looking for some offset info - Mounting the stock tires on aftermarket wheels, what's the compatible offset range before needing to modify anything? Thanks!
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Old 12-31-2020, 09:50 AM   #8539
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Looking for some offset info - Mounting the stock tires on aftermarket wheels, what's the compatible offset range before needing to modify anything? Thanks!
That will depend somewhat on whether you stick with the OE wheel width or go wider. If wider, how much wider matters.



Side note, if you're not going with wider wheels I'm not seeing there being any real benefit.


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Old 12-31-2020, 10:12 AM   #8540
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Originally Posted by gewehr43sniper View Post
For a 265/35-18 tire, any recommendation on a wheel that would fit with stock suspension on a 2017 wrx sti?
That tire size really wants a 9.5" wide wheel. I'm a lot less sure about the offset you'll need, but I have a feeling that anything less than +45 would be 'iffy' out back. If I was doing it for myself, I'd make more careful measurements of the room that my current wheels and tires have and try to see if there's enough inboard room available to support using +50.

+45 puts all of the added width on the outside



+50 tightens up inboard clearances but improves the situation on the sheetmetal side



+40 looks like it might be crowding the rear sheetmetal a bit too close to call



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Old 12-31-2020, 10:51 AM   #8541
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Quote:
Originally Posted by Norm Peterson View Post
That will depend somewhat on whether you stick with the OE wheel width or go wider. If wider, how much wider matters.



Side note, if you're not going with wider wheels I'm not seeing there being any real benefit.


Norm
Thank you

Being as I'm just mounting the stock tires, I won't be going wider.

Not seeing a benefit in what regard?
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Old 01-01-2021, 10:41 AM   #8542
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Thank you

Being as I'm just mounting the stock tires, I won't be going wider.
I know you said stock tire size. That's not what I was getting at.

The stock 245/40-18 tires can be mounted on wheels anywhere from 8.0" wide to 9.5" wide without exceeding tire industry guidelines on tire to wheel fitment. 8.5" only happens to be the nominal "measuring width" for that size, and while it probably represents a good overall compromise between performance and ride quality the use of "measuring width" and nothing else is not a cast-in-stone requirement.


Quote:
Not seeing a benefit in what regard?
The amount of track width that you gain isn't enough to matter in terms of cornering grip, and it doesn't matter at all for straight line acceleration or braking. You'll never notice the 2% increase in track width that would happen by going from +55 to +38. Certainly not on street tires in street driving. But the smaller you go with +offset, the more you're crowding tire to sheetmetal clearances (especially for the rear tires). Performance bang for the buck just isn't there. Not even if the change in appearance makes you think otherwise.

That said, dropping the +offset by only a few mm, something like 5, would open up more wheel choices. My "cold weather" setup is 245/40-18 Michelins on 18x8.5 ET+50 Enkei Raijin wheels. Rides and handles close enough to stock that I can't tell any difference that isn't due to summer performance tires vs top-shelf all-seasons - and that's going to be temperature-dependent as well.


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Old 01-07-2021, 06:41 PM   #8543
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Hey guys, does anyone have experience with the Motegi trak lite wheel line? I was looking at the 6 spoke trak lite model. They offer a 18x 8.5 inch +42 mm offset. Im assuming those would fit my 2019 WRX premium. Ive got factory brakes. Hows the quality and fitment of the Motegi stuff?
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Old 01-07-2021, 08:59 PM   #8544
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Hey guys, does anyone have experience with the Motegi trak lite wheel line? I was looking at the 6 spoke trak lite model. They offer a 18x 8.5 inch +42 mm offset. Im assuming those would fit my 2019 WRX premium. Ive got factory brakes. Hows the quality and fitment of the Motegi stuff?
I've got a set of 18x9.5 et45. They fit with plenty of space on my STI and don't rub with 265/35 RT615k+'s. The wheels are my autocross wheels so I don't much care about the finish but for $185 wheels I was fairly impressed.
Not sure what else there is to say about a set of wheels. They're not the lightest but they've taken a beating, are still round and the paint isn't chipped etc. They're easy to clean and they look good. Right now I'm debating getting another set of their CM147's in 18x9.5 et45 to put Advan V601's on. But I might grab a set of Enkei PF05's.

https://forums.nasioc.com/forums/sho...postcount=8395

This post near page 6 (for me) is some photos with my car and the tires installed.
https://forums.nasioc.com/forums/sho....php?t=2844147

Last edited by xpystchrisx; 01-07-2021 at 09:11 PM.
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Old 01-08-2021, 01:47 AM   #8545
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Originally Posted by xpystchrisx View Post
I've got a set of 18x9.5 et45. They fit with plenty of space on my STI and don't rub with 265/35 RT615k+'s. The wheels are my autocross wheels so I don't much care about the finish but for $185 wheels I was fairly impressed.
Not sure what else there is to say about a set of wheels. They're not the lightest but they've taken a beating, are still round and the paint isn't chipped etc. They're easy to clean and they look good. Right now I'm debating getting another set of their CM147's in 18x9.5 et45 to put Advan V601's on. But I might grab a set of Enkei PF05's.

https://forums.nasioc.com/forums/sho...postcount=8395

This post near page 6 (for me) is some photos with my car and the tires installed.
https://forums.nasioc.com/forums/sho....php?t=2844147
I appreciate the help. I was thinking of getting the satin black (I think thatís what they call it). I was curious chipping and just overall quality. The rims I was looking at will be my summer set up and possibly see a little track duty this coming summer if things pan out. Those wheels look sharp on your car.
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Old 01-10-2021, 04:07 AM   #8546
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Default 2015 WRX/STi Aftermarket wheel and tire fitment

Finally got around to installing the suspension and wheels. Typical specs 18x9.5 +38 with a 265/35/18 tire setup. Definitely have room in the front for a 10mm spacer which I might do as soon I get extended studs.

Last edited by j0hnnytsunami; 01-10-2021 at 04:18 AM.
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Old 01-14-2021, 01:31 PM   #8547
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Finally got around to installing the suspension and wheels. Typical specs 18x9.5 +38 with a 265/35/18 tire setup. Definitely have room in the front for a 10mm spacer which I might do as soon I get extended studs.
What brand/model tire are you running? I'm looking to switch up to 265 (from 255). Thanks in advance!
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Old 01-17-2021, 10:39 PM   #8548
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Hey there, I have 18x8.5 rims with a +35 offset. What is the best performance setup so that there is no rubbing and etc. The meatier the better. I'm thinking about 235/45/18 but I'm not sure. Please help
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Old 01-18-2021, 08:41 AM   #8549
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Originally Posted by LakixPompa View Post
Hey there, I have 18x8.5 rims with a +35 offset. What is the best performance setup so that there is no rubbing and etc. The meatier the better. I'm thinking about 235/45/18 but I'm not sure. Please help
What kind of performance are you looking for? Corners or straight line acceleration?

I'm afraid that "The meatier the better" doesn't help me very much. Meeting some specific kind of performance and a particular appearance preference don't always go hand in hand.


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Old 01-18-2021, 10:13 AM   #8550
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Originally Posted by LakixPompa View Post
Hey there, I have 18x8.5 rims with a +35 offset. What is the best performance setup so that there is no rubbing and etc. The meatier the better. I'm thinking about 235/45/18 but I'm not sure. Please help
235 is less meat than stock lol
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