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Wheel Backspacing and Offset Info

Discussion in 'Wheels & Tires' started by tcBob, Jul 17, 2010.

  1. Oct 27, 2013 at 5:43 PM
    #501
    replica9000

    replica9000 Well-Known Member

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    I'm running 18x9 rims with a 0mm offset. -6mm means it will stick out 6mm (roughly 1/4") from the fender more than my wheels do.
     
  2. Nov 12, 2013 at 11:43 PM
    #502
    Rich91710

    Rich91710 Well-Known Member

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    Found this in some old files.... handy quick reference.

    backspacing.jpg
     
  3. Nov 19, 2013 at 2:59 PM
    #503
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    Sub'd....
     
  4. Nov 19, 2013 at 8:42 PM
    #504
    JAFO

    JAFO Active Member

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    I read through a great portion of this thread. Interestingly there was no specific answer supplied making it clear on the backspace that is the proper dimension when running the 285 tires. If I missed it I apologize but seemed like a lot of debate then the people asking "if this will work" post. Clearly there has to be an optimum backspace required to allow the larger tire to fit with no mods or minimal trimming.

    While I agree it is so hard to tally up all the factory dimensions of the optional wheels offered by Toyota but why worry about it quite honestly being you will change them.

    As I have been searching for wheels I like, it is a chore to get the information from the manufacturer about the backspacing.

    With that said, does anyone have the magic numbers for a 7" to 8" wide wheel? Is it 4.5" BS that will allow the proper clearance of the UCA while not sticking out much past the fender line?
     
  5. Nov 20, 2013 at 10:55 AM
    #505
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    You're still gonna get a multitude of answers because most lifts are gonna have different number outcomes....4.5" seems to be where a lot of guys are at though...
     
  6. Nov 20, 2013 at 6:07 PM
    #506
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    What he said....
     
  7. Nov 20, 2013 at 10:18 PM
    #507
    replica9000

    replica9000 Well-Known Member

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    At the moment, I have a 18x9 wheel with 0 offset (so should have a 5" backspacing). The tire is 305/60-18. I also have a 3" lift with LR UCAs. I have about 1/2" between the tire and UCA, and my tire sticks out no more than 1/2" from the flare.

    I should be swapping to a 16x8 with 0 offset soon, and a 285/75-16 tire (very common for us around here). That should put my tire flush with the fender flare.
     
  8. Nov 21, 2013 at 3:48 PM
    #508
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    That is an old file...no -negative Offset values...
     
  9. Nov 21, 2013 at 6:31 PM
    #509
    JAFO

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    I agree. The variables are endless. Final lift kit geometry, simple leveling kits, lift total height, tires are spec'd generically, wheels etc.

    Its all good. Its a good thread but doubt it will answer much.
     
  10. Dec 5, 2013 at 10:13 AM
    #510
    xTACOMAx

    xTACOMAx Well-Known Member

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    The xd spy rims come in the size 18" x8.5 with a offset of +18 and a backspacing of 5.460 how much of a difference would these rims stick out from the stock TRD sport 17" rims?
     
  11. Dec 5, 2013 at 4:02 PM
    #511
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    Last edited: Dec 30, 2013
  12. Dec 27, 2013 at 10:16 AM
    #512
    jefffireblaze

    jefffireblaze New Member

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    New to this site so sorry if this has already been asked.
    Is anyone currently running 18x10? And if so did u have to trim or have any problems driving daily or rubbing on anything?

    I want to run 18x10 on 33's with wheels that off set 24 with a 6 inch lift. I really don't want to trim it's a new taco.
     
  13. Dec 27, 2013 at 10:25 AM
    #513
    replica9000

    replica9000 Well-Known Member

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    You're going to have to start cutting just for the 6" lift. You'll have to do a drop bracket kit and that requires cutting out the cross member. Unless you do a 3" suspension lift and a 3" body lift.

    You mentioned 18x10 rims, and a 33" tire, but how wide of a tire? I'm currently running 18x9 -0 offset rims and 305/60 (roughly 33x12) tires with a 3" lift. I had to trim some of the inner fender flare, most of the mudflap (might as well just remove it), and chop some of the cab mount. It's not noticeable unless you're looking for it.
     
  14. Dec 27, 2013 at 1:35 PM
    #514
    jefffireblaze

    jefffireblaze New Member

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    Well my main question is...The back space is recommended 4.5...is anyone running with 5.0? And if so what problems do u have?
     
  15. Dec 29, 2013 at 5:14 PM
    #515
    jetta.the.hut

    jetta.the.hut B4nn3d

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    I bought some 16x9 enduros with a -12 offset, backspace of 4.53. Can I roll with my 245/75/16 for now or do i need to go bigger?
     
  16. Dec 29, 2013 at 5:50 PM
    #516
    Rich91710

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    Had a post a couple of days ago from a guy running 285/70-17 on 17x9 with -12 and they rub the LCA.
     
  17. Dec 30, 2013 at 2:02 PM
    #517
    jetta.the.hut

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    yeah thats why i got 16x9's im really wanting 265's . im running a 3" Old Man Emu 885's with a 1/4 poly spacer I hope i dont rub.
     
  18. Dec 30, 2013 at 3:43 PM
    #518
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    Rich, Im running that exact setup @ 3" with Dura Tracs(which seem rub more than other's, due to the pronounced shoulder lugs), but I cleared the LCA's no prob, had to ditch the flaps, and trim bottom inside corner plastic, with minor Cab Mount rub at full lock, installing LR UCA's this weekend so I can move the suspension to the front so I don't have to CMC...alls I need is a 1/2" to clear...:pray:
     
  19. Dec 30, 2013 at 3:49 PM
    #519
    AWF ROWD

    AWF ROWD ~~I'll just put the tip in...~~

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    40.102° N, 82.804° W
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    TRD Supercharger, Walbro 255 FP Upgrade, aFe Stage 2 si CAI, TRD Acrylic cover by Coupe ADD 1 OIL Catch can/SS hoses, TRD cat back exhaust, URD 2.8" Stealth pulley, 3" lift, Toytec/Bilstein C/O's, Toytec Progressive AAL's, LR UCA's, 5100 Rear Billies, Bi-Xenon HID BHLM Retro's w/ Halos RED LINE Tuning Hood Rods Swaybar Relocate, Line X'd Bull Guard/Step, Hitch, Craven Speed Dual Gauge mount, AEM Boost/AFR Gauges, Windows 20% tint, Weather Tech deflectors, GrillCraft upper and lower, Tacoma Raptor letters, LED Interior/Exterior lighting, Lund 6" Color Matched Oval Side Bars, Webasto 700 II sunroof, Heated Two toned custom leather TRD logo'd, Kenwood Multimedia 6990 HD head unit ,JL Stealthbox sub, Hertz Component speakers,, Entire cab damped with hushmat, Viper Security/Remote start, Weather Tech Liners, Blackened exterior LED Lights, Undercover Top w/LED's, Carbon fiber TRD windshield decal,, TRD stitched leather shift knob, TRD steering wheel emblem,
    If you want to go bigger I think you can run with some 265's with no prob...the -12 offset is going to pull your tire away from your suspension.
     
  20. Dec 30, 2013 at 7:08 PM
    #520
    Supashawn

    Supashawn Well-Known Member

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    would a 16x8 with 4.25" backspacing be better or worse for rubbing?
     
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