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Stupid Noob Question #344: Matching Tire Width to Rim Width

Discussion in 'Wheels & Tires' started by 28ØØ3, Jun 16, 2009.

  1. 28ØØ3

    28ØØ3 [OP] Well-Known Member

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  2. David Tarantino

    David Tarantino Well-Known Member

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    ok if i understand what your saying
    you want to use a 17x9 rim with a 265/70t17 tire
    NO dont do it
    its not safe
     
  3. Simon2150

    Simon2150 Well-Known Member

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  4. usctacoma

    usctacoma Be a thinker, not a stinker

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    Im running 265/70/17 with 17x9 rims and I don't have any problems. I didn't even look at what the manufactuer said what size rims it would fit. Shouldn't all 265/70/17 tires be the same size?
     
  5. Janster

    Janster Old & Forgetful

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    What tire pressure are you running at?

    Did you do a 'chalk test'?
     
  6. Janster

    Janster Old & Forgetful

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    Most of your rim widths are going to be slightly smaller than the tire width.

    For instance - most 1st gen tacomas run with 7" wide rims and have 31"x10.5" tires.

    15x9" rim is a bit on the large side.

    I run 15x8" on my Jeep and I have 35x12.50" tires on them at 30psi.

    A 17x8" would be ideal to run all sorts of different tire combinations. You gotta have the proper backspacing also.
     
  7. usctacoma

    usctacoma Be a thinker, not a stinker

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    to be honest, i have no idea, but i should probably check huh?
     
  8. STLTaco09

    STLTaco09 Well-Known Member

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    5100's all around, fronts at 1.75". TSB leaf pack + Toytec TSB AAL
    What tires do you have? Maybe your 265/70/17 tires are made to fit a 9" wide rim? Some are, some only go to 8.5".

    This is a great question too. It seem slike 17x9 are really popular, but tires such as the BFG TA/KO and KM 2 say the recommended rim width is 7"-8.5" for a 17" tire.
     
  9. usctacoma

    usctacoma Be a thinker, not a stinker

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    I have Firestone Destination ATs
     
  10. David Tarantino

    David Tarantino Well-Known Member

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    guys iam just saying i have been doing tires/wheels for 30pl yrs
    damn thats a long time :D i feel old now :eek:
    anyway how i feel is yes it can be done
    just dont feel thats its safe :D
     
  11. STLTaco09

    STLTaco09 Well-Known Member

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    5100's all around, fronts at 1.75". TSB leaf pack + Toytec TSB AAL
    Those have a 7"-8" rim width recommendation. Interesting.

    Why do you feel it is unsafe? I'm not disagreeing with you, I just want your thoughts behind this. Obviously the manufacturer put those recommendations there for a reason, just like the speed rating. But what risks are you running if you run a 9" wide rim on a tire that recommends an 8" or 8.5" max rim width?
     
  12. David Tarantino

    David Tarantino Well-Known Member

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    it is possible that the tire can come off the wheel
    now iam not saying that it will happen but it can
    and iam sure that there are sum out there doing it and
    nothing has happened i hope it never does
    but you need to go to a bigger tire to get more with
    for the tire to mount on the wheel
    :D
     
  13. mgrande

    mgrande iKill

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    So if I'm looking at 18x9 rims to go with some 275/70/18's that say will take up to a 9" rim I'm fine right? Just as long as I follow the tire manufacturer's spec's?
     
  14. Janster

    Janster Old & Forgetful

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    I'm just throwing a wild guess at this.... this is gonna be hard to explain what I'm thinking here.

    This might have a lot to do with how the tire 'seats' itself on the bead of the rim at a certain tire pressure.

    A rim that's too wide for the tire can affect the overall tire pressure you run to ensure proper tread wear on the street. That pressure might not be enough to keep the tire in the bead of the wheel.
    If you make an aggressive turn - could cause the tire to 'roll over' and off the bead perhaps. ????


    Scroll down to "rim width range"
    http://www.tirerack.com/tires/tiretech/tirespecskey.jsp
     
  15. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    This is what I was thinking as welll
     
  16. SC4333

    SC4333 Well-Known Member

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    I'm with David on this one. A 9 inch rim, paired with a 265/70R17 tire is just not a good match. It is unlikely that it would ever happen, although, you take the risk of having your tire's bead becoming un-seated, especially in off road situations with low tire pressure and rocks pushing on the side wall.
     
  17. STLTaco09

    STLTaco09 Well-Known Member

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    5100's all around, fronts at 1.75". TSB leaf pack + Toytec TSB AAL
    There are plenty of 265/70/17 tires that have a rim width range of up to 9". Revo A/T, Destination A/T, Nitto TG to name a few. If the manufacturer has 9" in the acceptable range, then I see no problem with it at all. It's the implications of running a rim wider (1/2" in this case) that I'm curious about.

    Searching for 275/65/17 and 275/70/17 tires reveals acceptable rim widths of up to 9.5". I saw a few posts on TN about someone running a 275/70/17 MTR with stock wheels and suspension without issue. Has anyone seen or heard of this size working?
     
  18. mgrande

    mgrande iKill

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    I started a thread on this yesterday, it seems that not too many people have this size. I guess I'll check out TN to see if I can find some info. Do you have to be a member? The last thing I need is to get addicted to another forum:D. If I find anything I'll post it in the thread I started so this one stays on topic.
     
  19. FoxySandChick

    FoxySandChick Well-Known Member

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    I'm running 265/70/17 on 17x9's with a tire that specifies it is approved for a 9" rim width, so how is that not safe?
    BTW it is the Nitto TG
    http://www.nittotire.com/#index.tire.terragrappler.sizes
    P265/70R17 113S 200-400 13.6 31.57 10.79 7.0-(8.0)-9.0 2535@35658
     
  20. AFButters

    AFButters Rigger, Please

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