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3/4 ton frontend with 15" wheels, do I need to grind?

Discussion in 'The Garage' started by Calclips, Dec 10, 2002.

  1. Calclips

    Calclips 1/2 ton status

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    3/4 ton frontend with 15\" wheels, do I need to grind?

    Do you need to grind the brake calipers on a D44 8-lug to get 15" wheels to fit?
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Yes..the more back spacing the rims have the more grinding you'll have to do.

    Rene
     
  3. fortcollinsram

    fortcollinsram 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    When I converted my 10-b to 8-lug, it was about 5-min worth of grinding with a 4" angle grinder...pretty easy...I am running 15x8 wheels with about 4-1/8" of backspacing...the easiest way to do it for me was to spray paint the caliper and mount the wheel and you can see contact area by where the poaint came off the caliper and grind away....

    Chris
     
  4. Calclips

    Calclips 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Well, I found a good deal from a friend on some tires for my truck, but the tires are 15". If I follow the caliper grinding article that depdog (I think it was him) wrote should I be fine? Does grinding the calipers have any adverse effects on braking, or strenth of the calipers?
     
  5. Calclips

    Calclips 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Is there a way to tell how much backspacing a set of wheels have? Is there something I can bust out a tapemeasure on and see?
     
  6. heavy4x4

    heavy4x4 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Yes, lay your wheel down on the ground with the shiny-side (what everyone sees) on the ground-side. Then, place a flat object on the top of the rim. (make sure it's on the rim - not the tire) Take your tape measure and place it on the flat surface where the wheel contacts the hub. Read the value your tape measure shows at the closest edge of the object you layed down. There you go..that's your backspacing.

    Hope that made sense.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    That article was by BadDog (Russ) and yes the principles are the same. I found the backing plate needed some grinding too and I was a little worried about the remaining strength in that area.

    Back space can be figured with a tape measure and a straight edge. Turn the wheel mount side up and lay a straight edge across the bead seat area of the rim (not the very edge...) and measure down to the mounting surface.

    Rene
     
  8. Calclips

    Calclips 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Okay, that all makes sense. Do you guys think that its worth it to grind the calipers to make the 15's fit? After I put the 15's on it, I should be able to air my tires down more than I could with the 16.5's... right?
     
  9. heavy4x4

    heavy4x4 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Well you can still air-down the same amount...but the 16.5" has a much better chance of blowing the tire off the rim. /forums/images/graemlins/smirk.gif /forums/images/graemlins/frown.gif
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    It was worth it to me...I often get my TSL's down to single digits and I have yet to lose a bead.

    Rene
     
  11. Triaged

    Triaged 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    I wish I had your luck with airing down...
    I lost the bead 3 times on our last trip.
    The last time was at 20psi /forums/images/graemlins/angryfire.gif and I just about rolled it
    I am running 36" TSL bias-ply's on 15x10 eatons.

    I thought it was worth it to get the safty bead...but now I wish I had gone with 16.5" with beadlocks.
     
  12. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    I jumped my truck with 8-9 psi running the same tires on 15x10's...it was on sand and the landing was pretty flat. I guess I need to try harder /forums/images/graemlins/thumb.gif/forums/images/graemlins/rotfl.gif

    Rene
     
  13. Calclips

    Calclips 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    Thats the answer, if you haven't broke it yet then your not doing something right.
     
  14. Triaged

    Triaged 1/2 ton status

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    Re: 3/4 ton frontend with 15\" wheels, do I need to grind?

    I had the right front up in the air going up a hill. Hill was granit and steep with a 4' droopoff on the right side. Bead blew and I landed on the inside of the rim on the edge of the ledge /forums/images/graemlins/1zhelp.gif.

    We had to hook up a few come-along's from my bumper and rollbar to a big rock to keep me from going over and hilift the front to reseat the bead...wasn't fun.

    Right now I think I'll go for some rockstomper beadlocks but will have to have my rims cut down (I don't want 12" wide wheels...10" is almose too much).
     

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