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17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?

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Old Apr 19, 2017, 11:58 AM
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17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?

I'm assuming the 265 won't clear the struts... I'd be ok with running a 10mm hubcentric spacer, but, I don't want them to poke outside of the fenders.

So, even though a 255/45R17 is slightly bigger (2.8%), it'll give the 9" wide wheel plenty of rubber.

Anyone running that size? What tires are you using and do you like them for mild street/strip? Suspension is Bilstein HD with Swift Spec Rs. Thanks my dudes
Old Apr 19, 2017, 07:21 PM
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um..who make s a 265 17 inch tire?

anyway, most sticky tires in a 255 are very nearly a 265
Old Apr 19, 2017, 07:45 PM
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I run a wide 265/40/17. Federal 595
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Old Apr 20, 2017, 05:38 AM
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Originally Posted by killerpenguin21
um..who make s a 265 17 inch tire?
This is the same OA diameter as a 235/45R17.

But looking to see if a 255 on +35 9" wheel will clear the Bilsteins.
Attached Thumbnails 17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?-untitled-2.jpg  
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Old Apr 20, 2017, 06:38 AM
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Originally Posted by True Blue
This is the same OA diameter as a 235/45R17.

But looking to see if a 255 on +35 9" wheel will clear the Bilsteins.
I would say that the fitment w/the struts should be OK. After all, the stock wheel is +38 & youre installing a +35. The 9" wheel will likely fit the same as the +38 w/the 8" wheel

Run a 255/40 tire & all should fit OK (cant see how the tire will contact the strut spring base in any way

Note: The 45 series is too tall giving a -2.72% speedo error. The 40 series is much closer at an acceptable +1.18%

Last edited by MinusPrevious; Apr 20, 2017 at 12:42 PM.
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Old Apr 20, 2017, 07:04 AM
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Go with a 255/40-17 tire.
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Old Apr 20, 2017, 10:12 AM
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Seems to be a lot more choice at 255/40R17, too.
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Old Apr 20, 2017, 10:44 AM
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Originally Posted by True Blue
Seems to be a lot more choice at 255/40R17, too.
Its a great size & the first step in the wide category for the EvO
Old Apr 20, 2017, 11:36 AM
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So, I now note the 255/40s are somewhat undersized compared to stock, meaning a sped-up odometer. Slowed down I can handle

Great website:
https://tiresize.com/calculator/

First image: stock vs. 255/40 (smaller)
Second image: stock vs. 255/45 (larger)
Third image: stock vs 265/40 (same diameter, but possibly too wide)
Attached Thumbnails 17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?-sizes.jpg   17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?-sizes-2.jpg   17" x 9" +35 on Swifts... 255/45R17, or 265/40R17?-sizes-3.jpg  
Old Apr 20, 2017, 12:47 PM
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Originally Posted by True Blue
So, I now note the 255/40s are somewhat undersized compared to stock, meaning a sped-up odometer. Slowed down I can handle
First image: stock vs. 255/40 (smaller)
Second image: stock vs. 255/45 (larger)
Third image: stock vs 265/40 (same diameter, but possibly too wide)
The 255/40 is very close & w/only a +1.18 speedo error. Been running these sizes for years & currently on the Federal 265/40/17 which runs a size wide (its really a 275)
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Old Apr 21, 2017, 07:52 AM
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Originally Posted by MinusPrevious
The 255/40 is very close & w/only a +1.18 speedo error. Been running these sizes for years & currently on the Federal 265/40/17 which runs a size wide (its really a 275)
wow! A 275 seems enormous in these wells. So a 265/40 will fit with no rubbing? I'm seeing the Potenza RE760 in 265/40R17 with a $70 rebate...

So, even though you're on the 265/40 you recommend the 255/40? I dislike the idea of the odometer spinning faster than it needs to, even if it's only 1% more. Buuuuuut I guess over 100 miles, it only ads 1 more... negligible at best.
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MinusPrevious (Apr 21, 2017)
Old Apr 21, 2017, 08:01 AM
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Originally Posted by True Blue
wow! A 275 seems enormous in these wells. So a 265/40 will fit with no rubbing? I'm seeing the Potenza RE760 in 265/40R17 with a $70 rebate...

So, even though you're on the 265/40 you recommend the 255/40? I dislike the idea of the odometer spinning faster than it needs to, even if it's only 1% more. Buuuuuut I guess over 100 miles, it only ads 1 more... negligible at best.
Did a lot of rear fender work to get the 275's to fit (Evo was orig fitted w/Nitto NT05 275/40) (Zero rub on the track)

After wearing the Nittos out, took a chance on the Federal 595 265/40's & they are great on the street & have the same tread width as the 275's. (nice stiff sidewall)

In your case, running a 17x9 +35 W/a 255/40 you will need to have the rear fenders rolled almost flat. Wasnt sure if you have done that already?

Joe

Last edited by MinusPrevious; Apr 21, 2017 at 11:26 AM.
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Old Apr 21, 2017, 02:12 PM
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Originally Posted by MinusPrevious
In your case, running a 17x9 +35 W/a 255/40 you will need to have the rear fenders rolled almost flat. Wasnt sure if you have done that already?

Joe
Ah - no, and I'm glad you mentioned that. Fenders are *not* rolled. Never tried that before, although I'm certain I could ask around the local forum for help with it. Sounds like a 265 is *way* too wide without some serious modification to the body, which I want to stay away from. These cars are already future classics. I'll stick with the 255/40 size.

Really appreciate the knowledge, Joe. Tire sizes and offsets are just something I never seem to get my head wrapped around.

-Tom
Old Jun 8, 2017, 08:50 PM
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Originally Posted by MinusPrevious
...

In your case, running a 17x9 +35 W/a 255/40 you will need to have the rear fenders rolled almost flat. Wasnt sure if you have done that already?

Joe
Rolling is not needed with this combo in my experience. Even with +5 mm spacers (giving an effective offset of +30 mm), I didn't need to roll with a relatively mild camber of -1.2 degrees. I am running ASUHP tires though, and they are a bit more narrow than a max performance, but I'd think that +35 mm with slightly more aggressive (and appropriate camber) of -1.5 to -2 degrees, a max performance 255 would fit without rubbing.
Old Jun 9, 2017, 05:40 AM
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Originally Posted by mrfred
Rolling is not needed with this combo in my experience. Even with +5 mm spacers (giving an effective offset of +30 mm), I didn't need to roll with a relatively mild camber of -1.2 degrees. I am running ASUHP tires though, and they are a bit more narrow than a max performance, but I'd think that +35 mm with slightly more aggressive (and appropriate camber) of -1.5 to -2 degrees, a max performance 255 would fit without rubbing.
What suspension are you running? I'm on Swift Spec Rs and Bilstein HDs.


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