What do I need to make rpf 1 18 x 10.5 +15 work? - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

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What do I need to make rpf 1 18 x 10.5 +15 work?

Old Oct 11, 2018, 02:22 PM
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What do I need to make rpf 1 18 x 10.5 +15 work?

I just got those sized rims didnt want to have to do anything but later reading people have been having to do modifications. I will be on swift racing springs and bilstein struts. Im on 18 w/ 255 tires and i scrape the liner on hard turns.
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Old Oct 11, 2018, 03:44 PM
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To make them fit and still have a useful suspension you need aftermarket body panels. The offset is too low for the rear of the car.
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Old Oct 11, 2018, 04:02 PM
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Yeah, +15 on a 10.5" is way too proud of the rear fender. Even those running the very popular Voltex over-fender dont run a +15 in the 10.5" IIRC

Steer clear of that spec

Heres the layout vs what i run (note: my rears are fully worked!). This +15 would poke 1.09" further


Last edited by MinusPrevious; Oct 11, 2018 at 04:16 PM.
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Old Oct 11, 2018, 04:17 PM
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Looks like im gonna have to swap em out for the 18 x 9.5 +15 .
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Old Oct 11, 2018, 05:40 PM
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The +15 is really not a great offset specifically in the rear of our cars. Must it be an RPF1? And are you opposed to running a spacer in the front? Im pretty sure they have a 18x9.5 +38 that would would pretty good but would most likely require around a 20mm spacer possibly a little less, I dont honestly remember bc I dont run RPF1s but I do know the info is posted here somewhere so please take a look or perhaps someone else in the fitment crew can chime in.

My main point was that I would recommend you pursue something with a higher offset.
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Old Oct 11, 2018, 06:14 PM
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Eric, Pretty sure your notes the RPF1's are correct. If you dont run the +38, up front, you would have to run the +18 RPF1 & the +38 in the rear, but then you cant rotate

And, for sure, the +15 is not, in any width, good for the EvO rear. Some guys have certainly done it, but they rub & all the troubles that go w/it

But, on the other side, if your going for the Stance fit-up, the +15 is OK.

Not sure if youre a function > fit type or the other way around
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Old Oct 11, 2018, 06:30 PM
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So stick with the stock fitment if i dont want any rubbing issues w/ also having springs
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Old Oct 11, 2018, 06:44 PM
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Originally Posted by Womb Raider View Post
So stick with the stock fitment if i dont want any rubbing issues w/ also having springs
Not necessarily

You have to be willing to modify the rear fenders (rolling 3/4 or a full flat roll, fender pulling, bumper bolt relocation & a few other tricks may be needed)
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Old Oct 13, 2018, 11:06 PM
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Which size requires the least mods?
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Old Oct 14, 2018, 09:34 AM
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No definite answer, but generally speaking IMO

17x9 to 17x9.5 +28 to +35
18x9 to 18x9.5 +28 to +35

Tire size certainly plays a factor

You have to be willing to modify the rear fenders. No way around it!
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Old Oct 14, 2018, 02:50 PM
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Mod rear fender in what way? Roll and Camber, just roll?
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Old Oct 14, 2018, 03:52 PM
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Not sure if Ive ever shared my ride w/you. Visually it looks very tame, in regards to wheel / tire fit but this set-up below required the following rear fender work
  • 3/4 rear fender roll
  • A noticeable rear fender pull just above the rear bumper cover
  • Bumper bolt relocation
  • -1.9 degrees of camber
  • Lower rear bumper cover has been pushed out 1"
W/T spec: 17x9.5 +30 running a wide federal 265/40 tire

Now, imagine running that +15 which pokes 1" further than this. There is no amount of work that could be done to fit those +15's properly

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Old Oct 15, 2018, 04:11 PM
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Hmm, very well. I guess i'll return these and get a smaller size.
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Old Yesterday, 07:49 PM
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Sending them back tomorrow. Does anyone else have any size inputs before I decide to task on a different size.
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Old Yesterday, 08:18 PM
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Originally Posted by Womb Raider View Post
Sending them back tomorrow. Does anyone else have any size inputs before I decide to task on a different size.
All listed above your post:

Originally Posted by heel2toe View Post
Im pretty sure they have a 18x9.5 +38 that would would pretty good.
Originally Posted by MinusPrevious View Post
Eric, Pretty sure your notes the RPF1's are correct. If you dont run the +38, up front, you would have to run the +18 RPF1 & the +38 in the rear, but then you cant rotate
Originally Posted by MinusPrevious View Post
No definite answer, but generally speaking IMO

17x9 to 17x9.5 +28 to +35
18x9 to 18x9.5 +28 to +35
Originally Posted by MinusPrevious View Post
  • 3/4 rear fender roll
  • A noticeable rear fender pull just above the rear bumper cover
  • Bumper bolt relocation
  • -1.9 degrees of camber
  • Lower rear bumper cover has been pushed out 1"
W/T spec: 17x9.5 +30 running a wide federal 265/40 tire

Now, imagine running that +15 which pokes 1" further than this. There is no amount of work that could be done to fit those +15's properly
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