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Tire & Wheel Forum sponsored by The Tire Rack |
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06-30-2020, 11:57 AM | #8501 | |
Scooby Newbie
Member#: 418242
Join Date: Apr 2015
Location: PA, USA
Vehicle:2017 WRX |
Quote:
*edited. Tire Rack suddenly dropped the price of the 255/40R18 to $135/ea shipped so had to jump on that.
* Registered users of the site do not see these ads.
Last edited by su_ba_roooo; 07-05-2020 at 11:13 PM. |
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07-27-2020, 01:25 PM | #8502 |
Scooby Newbie
Member#: 517094
Join Date: Jul 2020
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07-27-2020, 05:16 PM | #8503 | |
Scooby Newbie
Member#: 517094
Join Date: Jul 2020
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Quote:
But when I check specs for rims sizes it shows me for this particular rims size 285/35r18 So I am also confused... how can I put a smaller width tire on a wider rim? Because there is a difference between 255 and 285. Anyone know if that company is correct? |
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07-27-2020, 05:17 PM | #8504 | |
Scooby Newbie
Member#: 517094
Join Date: Jul 2020
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Quote:
But when I check specs for rims sizes it shows me for this particular rims size 285/35r18. So I am also confused... how can I put a smaller width tire on a wider rim? Because there is a difference between 255 and 285. Anyone know if that company is correct? |
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07-27-2020, 06:42 PM | #8505 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
That said, it is technically undersized versus stock. I personally would use 265/35 which is closer to stock size. Clearance and rubbing depends on a lot of factors including how low you are, camber specs, spring rates, etc. |
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07-28-2020, 07:41 AM | #8506 | ||
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
Quote:
The tire industry range of rim widths for the 255/35-18 size runs from 8.5" all the way out to 10", inclusive. The tire industry range of rim widths for the 285/35-18 size runs from 9.5" to 11". Quote:
dpetro is correct in that 255/35-18 is undersize, at least if your car's original size is 245/40-18. You could crutch that by running 255/35-18's at something like 36 psi, but count on tread center wear and ride quality both suffering as a result. All else equal, better to just go with 265/35-18's and door-sticker inflation pressures. Honestly, 9.5" wheels with +45 offset would likely make for an easier fit. You want an inch more rim width, and +35 wastes 10mm that could be better used for fender-side clearance without getting any closer to the struts and other inside stuff than the OE wheels and tires do. Norm |
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07-30-2020, 03:07 AM | #8507 |
Scooby Newbie
Member#: 487805
Join Date: Jun 2018
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I know this might seem redundant, but i just want some advice before i make my final decision. I am currently running my 2017 wrx on the stock Dunlops 245/40/18 on a set of 18x9.5+35 wheels. The car is on coilovers with roughly -1.2" -1.0" drop (front/rear). The fitment looks great but the wheels got warped and bent from the nasty roads in the local area (and the stretched tires).
I have a new set of wheels arriving in a month with similar dimensions but slightly less poke (18x9.5+40) and was thinking of getting Michelin pilot sport 4S summer tires but I'm not sure of the size yet. Either 255/40 or 265/35 but I don't want to modify the fenders. I may also raise the ride height just a bit too. Any input is appreciated. |
07-31-2020, 03:16 PM | #8508 | |
Former Vendor
Member#: 510521
Join Date: Jan 2020
Location: Pleasanton, CA
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Quote:
For a street car running PS4S with minimal camber, you can automatically remove the 275's and 285's off the list as those are really only warranted on track/race cars. Since you want to go wider than your current 245's to gain more rim protection and avoid any form of stretch, you can also remove 245's. Deciding between 255/35-18, 255/40-18 and 265/35-18 really comes down to whether or not each of these sizes is available in the compound you're choosing to run (they are all available in the PS4S), and how you want to prioritize grip (width), comfort (sidewall) and fitment (whether or not you're willing to perform any additional modifications to avoid rubbing under suspension compression). The 255/35-18 is the easiest to fit of the three as they are not quite as wide as the 265's, and they are not quite as tall as the 255/40's. No modifications would typically be necessary. 265/35-18 arguably suits the 9.5" wheel width the best in that it leverages the width of the wheel and better protects the inner and outer lips of the wheels from damage. Depending on factors like ride height, camber settings and even spring rates, you may lightly rub under suspension compression. If you have some negative camber dialed in, you typically will not have any issues. If you want a little more sidewall, 255/40-18 would be the best choice. If you experience any rubbing under suspension compression it wouldn't be because of the width, rather it would be due to the slight increase in height over stock. There is no wrong answer here. 245/40-18 - 25.7" (stock) 255/35-18 - 25" (-2.7% shorter) 255/40-18 - 26" (1.2% taller) 265/35-18 - 25.3" (-1.6% shorter) 275/35-18 - 25.6" (-0.4% shorter) 285/30-18 - 24.7" (-3.9% shorter) Here are some supportive photos of each of these tire sizes, all mounted on our EC-7 18x9.5" ET38 WRX/STI wheels (2mm more aggressive than the wheels you went with). At the end of the day ride height, tire model and camber settings will all change the final outcome from one car to another, even if the same tire size and wheel specs are used. 245/40-28 Michelin PS4S 255/35-18 Federal 255/40-18 Conti ExtremeContact Sport 265/35-18 Nankang AR-1 275/35-18 Toyo RR - Ryan Last edited by APEXRaceParts; 09-10-2020 at 06:49 PM. |
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07-31-2020, 03:41 PM | #8509 |
Scooby Newbie
Member#: 233053
Join Date: Dec 2009
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Droool 275/35.
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08-01-2020, 07:42 AM | #8510 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
One thing about the 255/35-18 size - it's something like three load index numbers smaller of a tire than the OE 245/40-18. You'd need to inflate it to 3 or 4 psi more than the 245/40 in order to maintain the same rated load capacity.
Seems to me, that would make the 255/35-18 the least attractive of the above three sizes shown in boldface. Norm |
08-03-2020, 11:41 PM | #8511 | |
Scooby Newbie
Member#: 487805
Join Date: Jun 2018
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Quote:
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08-04-2020, 08:48 PM | #8512 |
Scooby Newbie
Member#: 461646
Join Date: Jan 2017
Location: North Carolina
Vehicle:2017 WRX |
Looking to go to a 255/35 from my 245/40 without any fender mods/rolling. What is everyones alignment specs for the sizes down below? Thank you! Just trying to get an idea of what to tell my alignment shop to prevent rubbing in the rear. (also on coilovers, and currently on Federal ss595, which a few people have said do run a little larger than normal?)
255/35/18 18x9.5 +35 - +40 (or similar), Last edited by Arisman11; 08-04-2020 at 08:56 PM. |
08-04-2020, 09:18 PM | #8513 |
Scooby Newbie
Member#: 431618
Join Date: Oct 2015
Chapter/Region:
MAIC
Location: Virgina
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Newb question: Does running a taller, such as 255/40-18 - 26" (1.2" taller) tire, effect your transmission or final gear ratio? Would this have an effect on performance?
Thanks for the great info Apex! |
08-05-2020, 06:50 AM | #8514 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
Going over an inch taller is certainly going to affect performance. Slower acceleration, Speedo will be wrong, etc. You want to keep the tire size within 3% of stock. |
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08-06-2020, 02:55 PM | #8515 | ||
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
Quote:
Quote:
A 255/40-18 is only about 0.3" taller than a 245/40-18 (WRX size). I wouldn't worry about a 1.2% loss of acceleration (it'd be roughly comparable to the difference between having a full tank of gas and having only half a tank). The 245/35-19 STi size isn't enough taller than the 245/40-18 WRX size to matter. Norm Last edited by Norm Peterson; 09-11-2020 at 07:13 AM. Reason: see text |
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08-06-2020, 03:49 PM | #8516 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
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08-07-2020, 12:31 AM | #8517 | ||
Scooby Newbie
Member#: 431618
Join Date: Oct 2015
Chapter/Region:
MAIC
Location: Virgina
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Quote:
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08-13-2020, 11:30 AM | #8518 |
Scooby Newbie
Member#: 515079
Join Date: May 2020
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Fender rolling
Has anybody done any fender rolling on the va chassis? I’ve got 9.5” + 38 with 265 tires.
Only lowered .75” but it’s rubbing in the rear. My local tuner shop told me the rear fenders can be problematic for rolling and suggested Lower control arms and like 3 degrees negative camber. Which seems really excessive to me. I honestly thought that such a mild drop would let me bypass this rubbing issue, but clearly I was wrong. And I’m nervous about the fender rolling. Or maybe some feedback on how this much camber would affect things overall if my toe was good? Last edited by Mdoonan; 08-13-2020 at 11:32 AM. Reason: Additional info |
08-21-2020, 02:11 AM | #8519 | |
Scooby Specialist
Member#: 450808
Join Date: Jul 2016
Chapter/Region:
SCIC
Location: Anaheim
Vehicle:2017 WRX Premium WR Blue Pearl |
Quote:
All you need for a shave is a dremel, a steady hand, and some sandpaper to get it smoothed out. There's less of a chance of you botching it since you're not stretching any bodywork or paint. I suspect if you have a more aggressive drop/wheel specs, a roll may be necessary. |
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08-25-2020, 03:26 PM | #8520 | |
Scooby Newbie
Member#: 515079
Join Date: May 2020
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Quote:
Took the dremel to the clip and removed about 1/2 of it, but still rubbing over big dips! Not sure if I should keep shaving, or just let it rub. I don’t wanna take off too much and loose the clip. |
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09-10-2020, 06:53 PM | #8521 | |
Former Vendor
Member#: 510521
Join Date: Jan 2020
Location: Pleasanton, CA
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Quote:
- Ryan |
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09-10-2020, 08:16 PM | #8522 | |
Scooby Newbie
Member#: 233053
Join Date: Dec 2009
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Quote:
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09-11-2020, 07:31 AM | #8523 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
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09-30-2020, 06:57 PM | #8524 |
Scooby Specialist
Member#: 142954
Join Date: Mar 2007
Chapter/Region:
NWIC
Location: Washington
Vehicle:2003 |
Will 18x9.5 +10 with 275/35 tires fit my 2015 wrx with stock suspension and not rub?
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10-11-2020, 01:06 PM | #8525 |
Scooby Newbie
Member#: 519300
Join Date: Oct 2020
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2020 wrx
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 |
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