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Dually rims?? What size are they??

Discussion in 'The Garage' started by cybrfire, Apr 24, 2005.

  1. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    16's or 16.5's or are both available?
     
  2. Eric M.

    Eric M. 1/2 ton status

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    Older 1 ton dually rigs came with 16.5 x 6", newer came with 16" x 6". Some of the older large vans or cab and chasis came with 19.5" x 6".

    Eric M.
     
  3. beater_k20

    beater_k20 Banned

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    my 81 K30 C+C came with 16", so i'm not sure if that's what you classify as "older". i still have 5 of the 6 wheels off of it sitting here.
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    my buddy has i think a 78 c30 with 16", not sure if they are original or not. ive seen 16.5s and 16.5" split rims.
     
  5. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    Well, I got a pile of 16.5" tires to use up so might as well try and find some 16.5" dually rims for the hauler. Now the next step is to figure out how much of a spacer willl be required to fit 12.5" wide tires in there. Thanks.
     
  6. Eric M.

    Eric M. 1/2 ton status

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    I'm not sure how old would be "older" in this case. I have a set of 16.5s that came with a dually axle from a GM pick up .... but I can't remember the year.

    I mave a 3" spacer with stock 16" dually rims that are shed with 36 x 12.50R x 16 Swamper radials ... if that helps. I think you're gonna have to mount one of those 12" wide tires on the stock rim and do a little measuring to figure it all out.

    Good Luck,

    Eric M.
     
  7. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    Thanks for the tip. I'll definitely mount up a couple and start seeing what's gona work out. I figured it'd be over 2" but hard to say till you can see it all. 3" is a good starting point.
     
  8. FWP

    FWP CRS

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    My 84 K30- 16s
     
  9. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    16, 16.5, and now 17's on the newer rigs. like stated before some vans came with 19.5's.

    my 96k3500 DRW had 16's on it.
    Grant
     
  10. crzytrckr

    crzytrckr Registered Member

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    My 68 wrecker has 17"....guess that's older, my 82 has 16"...glad they are going back to 17" cause goodyear was going to have to order me a tire for the wrecker untill i convinced them it was OK to patch a weather checked tire...Wrecker is only used once or twice a year...
     
  11. R72K5

    R72K5 Banned

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    wow this thread is all messed up,,


    17.5 and 16.5 and 16 and 19.5 are all found on gm since the 60s and before through the 80s

    i ahve had many 17.5 rim 67-72 duallies they are common as dirt and 19.5 were available

    the 71 dually i ahve nopw has 16" splits on it

    16.5 existed all the same years too

    there were no certain years except that 17.5 and 19.5 died after 72

    17.5 were std equipment base rims 72 older years


    they were not 17


    just for an example, here is straight from 68 chevy truck specs books printed by chevrolet in may 1 1968 series C20 for dealers to show buyers ordering options for a new vehicle purchase/order:

    standard equipment;
    wheels;
    five 17.5" x 5.25"; attachement, 8 studs on 6 1/2" circle; spare carrier under frame; four painted hubcaps are used

    on 68 C-20 series trucks these wheel sizes were optional equipment:
    tubeless:
    16.5" x 6.75" RPO QE7
    16.5" x 8/25" RPO S89

    tube type:
    16" x 6.00" RPO Q20

    i have other years too, and tires and all kinds of other original gm std and optional equipment RPO info


    good luck
     

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