Help me understand offset v/s Backspacing

Discussion in 'Renegade Wheels & Tires' started by ospreyfe55, May 18, 2016.

  1. ospreyfe55

    ospreyfe55 Active Member

    Joined:
    Mar 5, 2016
    Messages:
    128
    Location:
    ABQ
    I am looking at new wheels/tires for the Renny TH however I would like to do this without using spacers. I am understanding that the TH wheels have an offset of 40mm, is this correct? So if I wanted to emulate wheels spacer(1"/25mm) then what should the offset or backspacing need to be to achieve this? I saw a picture of a TH on Jeep Renegade Americas that had the setup I wanted however there where no details, but I managed to find the wheels that were on it. They do not have the bolt pattern but sell blanks. Here is the wheels I am looking at http://www.motometalwheels.com/wheel/20344/mo970 Also if you look at the wheel specs, let me know which setup would be best, i.e 16" vs 17" and 8" or 9" wide.
    Any help in this area is much appreciated!
     
  2. ospreyfe55

    ospreyfe55 Active Member

    Joined:
    Mar 5, 2016
    Messages:
    128
    Location:
    ABQ
    ImageUploadedByToasterJeep1463595536.053774.jpg
    Here is the pic I saw!
     
    Thawk likes this.
  3. Arhshelby

    Arhshelby Member

    Joined:
    Apr 23, 2016
    Messages:
    82
    Location:
    Smithfield, VA
    That looks really nice, did the post say if that TH is lifted also, I can't tell?
     
  4. ospreyfe55

    ospreyfe55 Active Member

    Joined:
    Mar 5, 2016
    Messages:
    128
    Location:
    ABQ
    No the post was just the pic
     
  5. Chad Lohrenz

    Chad Lohrenz Active Member

    Joined:
    Jan 27, 2016
    Messages:
    149
    Location:
    Lincoln, Il
    It's lifted.
     
    JoshMo87 likes this.
  6. Arhshelby

    Arhshelby Member

    Joined:
    Apr 23, 2016
    Messages:
    82
    Location:
    Smithfield, VA
    I figured it was, just wanted to make sure. Am I the only one that does not like these big ass center lug covers that seem to be on alot of aftermarket wheels these days? They just look really out of place to me.
     
  7. Jack D

    Jack D Active Member

    Joined:
    Apr 5, 2016
    Messages:
    128
    Location:
    Connecticut
    You're not alone.
     
  8. dee35124

    dee35124 Active Member

    Joined:
    Mar 16, 2016
    Messages:
    195
    Media:
    2
    Albums:
    1
    Location:
    Alabama
    Don't go anything over an 8" wheel. I went 8.5" and had to run spacers... Although the offset was 35 on my wheels...
     
  9. FireHawk

    FireHawk Active Member

    Joined:
    Feb 29, 2016
    Messages:
    330
    Location:
    NC, United States
    Like Dee said, this is something we're still trying to figure out. I do not know what the offset is on the stock wheels, but they are pretty narrow at ~ 7 inches. When you go wider wheels, you will need more offset because the added width of the wheels will hit the struts up front. Most FUEL wheels that ive researched list the offset around 30-40, which is roughly what the stock wheels are if your numbers are correct. I believe the stock wheels must be less than 40, as G Force wheels are said to clear TrailHawk calipers with a 27 or 28mm offset, and those are only 16"x7 wheels.

    Im really hoping that a 16x8 wheels from FUEL with around 35-38mm offset will fit and clear the strut without having to run spacers. Im looking at 2 different models that I like currently, and will be working with my shop on Friday to take some measurements and see if we think we can make it work.

    To get FUEL wheels you will have to order them from blanks for our bolt pattern, and I really don't want to order them custom drilled and them not fit correctly. If I ended up having to run spacers it wouldn't be the end of the world, but personally I just don't like the idea.

    Also, that blue TrailHawk is definitely lifted, looks like the DayStar kit.
     
  10. FireHawk

    FireHawk Active Member

    Joined:
    Feb 29, 2016
    Messages:
    330
    Location:
    NC, United States
    Wanted to add to that to me personally having a 9" wide wheel isn't much of an advantage, especially since we can't take advantage of the width to add much wider tires on the Renegade without some major bodywork involved.

    But if you don't care about voiding the warranty and are willing to cut some metal out, you can fit some pretty substantial meats under one.
     
  11. joel.teq

    joel.teq New Member

    Joined:
    Jan 15, 2017
    Messages:
    17
    Location:
    Seattle
    i'm running 255's on a 18x9.. no metal cutting. just 12mm spacers, which makes the effective offset of my wheels +23mm.

    offset is distance from true centerline to actual face of wheel hub (where it bolts to the vehicle). zero to positive numbers mean the wheel is inset (pushed toward center of car) from centerline, and zero to negative numbers mean the opposite.

    backspacing is a true number, telling you the distance from the most outer edge of your wheel rim to the hub face. this number is helpful, only if you can't calculate the average overall width of your given wheel. most wheels are actually 3/4" wider than their stated width (9 inch wheel is actually 9.75), so if you can do basic math, you can calculate backspacing if given width and offset, and vice versa.

    cheers,

    Joel
     
    manucrystal, direfie99 and Quinto_G like this.
  12. LimitlessEAD

    LimitlessEAD Member

    Joined:
    Aug 2, 2016
    Messages:
    71
    Media:
    20
    Location:
    Midwest
  13. LimitlessEAD

    LimitlessEAD Member

    Joined:
    Aug 2, 2016
    Messages:
    71
    Media:
    20
    Location:
    Midwest
    • To answer your question, You would need a 15mm Positive Offset or ET15 for your 1" spacer emulation.
    • That Moto Metal wheel you are looking at does not come in a 5x110 bolt pattern.
    • They do offer blanks, so custom drilling may be an option, you'd have to call them
    • You would need to run a spacer/adapter to change the lug pattern to use the mentioned wheel, they offer a 17x8" - 5x130 with an ET50 with a spacer adapter of 1" you can get that to about an effecting ET25.
    • Bora spacers would be your friend here, they can make a set of adapters to match the hub side centerbore and lug pattern and the wheel side centerbore and lug pattern, this side can also be wheel studs instead of lug bolts. These will run you somewhere in the neighborhood of 60-75 bucks per wheel.
    • All the 16" wheel options are zero offset leaving you less then no room to run a spacer adapter. They offer blanks in the 16" also at zero offset but that is really really pushing it for swing radius issues with the fender pinch seam unless you run a pretty small tire.
    You could run these wheels, but it will likely cost an arm and a leg and require a pinch seam mod if you plan to run a larger tire.
     
    Last edited: Apr 14, 2017

Share This Page