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Who has 39.5x15 tires?? Question about lift

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Mudzer, Dec 4, 2001.

  1. Mudzer

    Mudzer 1/2 ton status Author

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    I am thinking about going with 39.5x15 tires soon and need your opinions.

    I currently have 6" front springs with 5" long shackles and major fender trimming, plus 4" rear springs and factory shackle flip. Question is, how did you all get your 39.5" tires to fit? Give me information about your lift and suggestions.

    Dont really want to install a body lift or new suspension, but I do have some 1" ORD Blocks and could remove more sheetmetal! [​IMG]

    Mudzer 1978/91 K5
    <font color=blue><a target="_blank" href=http://www.mudzer.rockcrawler.com>www.mudzer.rockcrawler.com</a></font color=blue>
     
  2. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    I will let you know this summer when I slap mine on. I plan on cutting out the entire rear wheel lip so the rear tires have room to stuff without hitting. In the front you may have to move the axle forward a little.

    Steve

    Director of Global Expansion
     
  3. Kyle89K5

    Kyle89K5 1/2 ton status

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    I'm gonna try a set of 38.5's prb. next summer with my 4" lift and more body relocation tech. I might go with a 1" body, but only time will tell. I'm gonna try it without first. Are you gonna ditch the 37"s or are they wearing too fast?

    Kyle
    89K5
     
  4. Boss

    Boss 1/2 ton status Author

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    Yeah, I'll be doing the same this summer. Talked to Watson about it and he suggested moving the front axle up no more than 1" and the rear could stay or be moved back up to 2" with no problems, except for minor cutting. the front will be a task if you want to keep the wheel tubs. (what I plan on doing). You have that to contend with along with the floorboards. I'll have to see I guess.
    Boss
    ps, oh, I have the 1" body lift already, and that was also recommended.

    Pic of my truck Before N' After
    <a target="_blank" href=http://coloradok5.com/gallery/BeforeNAfter>http://coloradok5.com/gallery/BeforeNAfter</a>
     
  5. big75jimmy

    big75jimmy Registered Member

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    Neil,
    I am going to use the 1" ORD Add-a-leaf and Hill 4wheel drive 1" lift shackles to get two more inches in the front along with ORD 4" shackle flip in rear and smaller blocks plus a 3" bodylift to make room for 44"s
     
  6. four_by_ken

    four_by_ken 1/2 ton status

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    8 inch springs all around and a little creative fender mods.

    Ken H.

    '86 K5 up and coming
    14 bolt(Detroited),10 bolt,39.5 Boggers rear,
    TSLs front, 468 BBC, 350 trans, 205 transfer
    Rust free in Michigan!
     
  7. 77Blazer

    77Blazer 1/2 ton status

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    I gutted my truck(only 2 plastics seats thats it), shaved the fenders, lost the top and fit 38.5 x14.5s with a 4" lift if I added a 1" body i could run those fun 39.5 boggers but I can only dream about those tires til i get out of college :(

    350, sm465, NP205, 14ff w/detroit, yucky ten bolt 4" springs,38.5x14.5 swampers
    <a target="_blank" href=http://www.planettribes.com/theden/gontw/nsig.jpg>http://www.planettribes.com/theden/gontw/nsig.jpg</a>
     
  8. Mudzer

    Mudzer 1/2 ton status Author

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    Have you guys heard of www.mountainoffroad.com ? They sell a 1" offset plate for moving axles either forward or rearward. I emailed them a while back and they say they are safe for use with front or rear even with angle shims in the springpack. I could buy a set of these and move the front 1" forward, then modify the front spring hanger bracket to move it forward another inch or so.

    Hey Watson, if you read this, let me know your thoughts on these off-set spring plates, plus what is the easiest way to relocate the front axle forward? I have 5" long front shackles so if I move the front spring hanger forward, will my shackles work fine? Will this change caster any? Wonder how my crossover steering will work? I also have 1" ORD Zero Rate blocks I could bolt into the spring pack.

    Keith pointed out another possible problem area. With having wide tires you run out of up travel on the rear inner wheel tub. Who makes spacers for 6 lug?

    I also need to install longer bumpstops up front to limit up travel a bit.

    Mudzer 1978/91 K5
    <font color=blue><a target="_blank" href=http://www.mudzer.rockcrawler.com>www.mudzer.rockcrawler.com</a></font color=blue>
     
  9. NOT4SHW

    NOT4SHW Guest

    I'm running 39.5's with 8" front and rear springs, 3" front shackles, 2 1/2" flip kit &amp; 3" body lift and still have rub the front fenders. I'm going to 44's soon and I will just be doing trimming to make them fit. I hope this helps but if you wan't to see it go to k5junkie webshots page. It is the gray '79 k5.

    '79 K5,13 1/2" lift, 39.5 TSL's,15x12 Eagles,350,t-350,warn 8274
     
  10. four_by_ken

    four_by_ken 1/2 ton status

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    3 inch front shackles from who?

    Ken H.

    '86 K5 up and coming
    14 bolt(Detroited),10 bolt,39.5 Boggers rear,
    TSLs front, 468 BBC, 350 trans, 205 transfer
    Rust free in Michigan!
     
  11. Boss

    Boss 1/2 ton status Author

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    I'm sure you can use the offset plate with no probs, assuming it bolts into your spring pack. It's just like using zero rates with offset. I personally wouldn't move the front hanger forward. Too much work for little gain, plus it will be the first to hit. I'm thinking of running Alcan front springs, maybe 49" to 50" long up front with 1" offset...that's my plans for now atleast. For the rear, I'm still comtemplating on what I should do, but it's not as a big of a deal as the front, b/c fitting 39.5"s in the rear aint a big deal.
    Have you checked Performance wheel and tire for their spacers? I'm sure they make em in 6 lug. I use 1.5" for the rear. My beedlock wheels has 4" backspace, so I'm thinking with that and the 15" wide tires, I "should" be ok, but I'll never know until everything is mounted.

    Pic of my truck Before N' After
    <a target="_blank" href=http://coloradok5.com/gallery/BeforeNAfter>http://coloradok5.com/gallery/BeforeNAfter</a>
     
  12. NOT4SHW

    NOT4SHW Guest

    Actually I just looked and they are only 2" longer than stock and they are hill 4 wheel shackles. I think there is a link on the main page in tech or something. I hope this helps.

    '79 K5,13 1/2" lift, 39.5 TSL's,15x12 Eagles,350,t-350,warn 8274
     
  13. DPI

    DPI 1/2 ton status

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    <a target="_blank" href=http://wsphotofews.excite.com/019/72/rl/iC/8W89156.jpg>This</a> is what I made to move my rear axle back 1.5" very easy, cheap, and tough. You also need to drill the top spring plate to clear the repositioned spring pin. I moved my front axle forward 1" by redrilling my axle spring perches and the top spring plate, this was free and is bullet proof.

    4.56 Geared, Power Locked, Dana 60
    4.56 Geared, TSM Disc Braked, Detroit Locked, Corporate 14
     
  14. lv2whl

    lv2whl 1/2 ton status

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    I run 12" superlift springs up front with *" superlift springs in the back and i also have a 2 in body lift. I was running 39.5 in mickey thompsons, but they were to small, so i am in the process of mounting 42" tsl's. With twelve inches of lift you can clear them fine, but it doesnt flex for sh*t. I dont know if that will help or not, but there you go.
     
  15. lv2whl

    lv2whl 1/2 ton status

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    I run 12" superlift springs up front with 8" superlift springs in the back and i also have a 2 in body lift. I was running 39.5 in mickey thompsons, but they were to small, so i am in the process of mounting 42" tsl's. With twelve inches of lift you can clear them fine, but it doesnt flex for sh*t. I dont know if that will help or not, but there you go.

    <P ID="edit"><FONT class="small">Edited by lv2whl on 12/04/01 01:21 PM.</FONT></P>
     
  16. Boss

    Boss 1/2 ton status Author

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    Tried your link, but it doesn't work.

    Pic of my truck Before N' After
    <a target="_blank" href=http://coloradok5.com/gallery/BeforeNAfter>http://coloradok5.com/gallery/BeforeNAfter</a>
     
  17. DPI

    DPI 1/2 ton status

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    Think I fixed <a target="_blank" href=http://wsphotofews.excite.com/019/72/rl/iC/8W89156.jpg>IT</a>.
     
  18. elkboy

    elkboy 1/2 ton status

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    <a target="_blank" href=http://photos.yahoo.com/bc/nepatten/vwp?.dir=/Project+K5&amp;.src=ph&amp;.dnm=done2.jpg&amp;.view=t&amp;.done=http%3a//photos.yahoo.com/bc/nepatten/lst%3f%26.dir=/Project%2bK5%26.src=ph%26.view=t>http://photos.yahoo.com/bc/nepatten/vwp?.dir=/Project+K5&amp;.src=ph&amp;.dnm=done2.jpg&amp;.view=t&amp;.done=http%3a//photos.yahoo.com/bc/nepatten/lst%3f%26.dir=/Project%2bK5%26.src=ph%26.view=t</a>
    4" suspension 3" body, a little fender trimming.[​IMG] . You will probably want a 2 or 3 inch body lift unless your willing to cut the fenders.

    <font color=red> Elkboy </font color=red> 82 K5 fuel injected H.O.305, TH350/205, 14bolt/10bolt and 39.5 TSL's.
     
  19. 88K5Jimmy

    88K5Jimmy 1/2 ton status

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    Hey Neil, are you running stock axles, or have you beefed up your six lugs?
    Thanks
     
  20. BOWTIE

    BOWTIE 1/2 ton status

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    I'm currently running 39.5x18x15 mounted on 15x14 bead locks. I think I should of ordered the wheels in a 12'' width because I didn't realize that the tires and wheels were going to kick out so much with the 3 1/2 backspacing used to fit the D60. My Blazer has a 8'' lift with ORD's shackles up front and I also cut my fenders to fit these tires. As soon as I can put this thing in the dirt I'll find out what I'm gonna have to do to compensate for the added width of the new wheels.



    ric

    <a target="_blank" href=http://community.webshots.com/user/bowtie1ton>Check out my K5.</a>
     

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