Single vs tandem axle truck

Discussion in 'Experienced Truckers' Advice' started by Bdog, Nov 21, 2015.

  1. Bdog

    Bdog Road Train Member

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    I will be pulling a verify specific load that is my equipment and won't change. Trailer will weigh approx 11k and load approx 22-23 for 33-34k gross. I will never haul more than this.

    Will a single axle handle this?

    Price wise the singles don't seem much cheaper than tandems and there seems to be fewer to choose from.

    Any advice? Are the tandems a lot more in maintence cost? I anticipate driving maybe 10-15k miles a year.
     
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  3. Old Man

    Old Man Road Train Member

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    Single axle no problem, maybe a class 7 truck would be better and cost less, no running big miles it should be no problem
     
  4. Rock 'n Roll Relocater

    Rock 'n Roll Relocater Medium Load Member

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    A single axle tractor is allowed 20,000 lbs and tandems are allowed 17,000 each for a total of 34,000 lbs. As long as you're not over 20,000 lbs on it you will be fine. No more mileage than you are talking about the difference in maintainance would be minimal. I found tandem trucks cheaper than day cabs when I was looking. Hope that helps.
     
  5. AModelCat

    AModelCat Road Train Member

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    4 less tires and 1 less diff = fuel mileage gain. That also means 4 less tires to replace and 1 less axle worth of brakes to wear out.

    Max GVW on a class 8 single axle would be 32k pounds (12k steer, 20k drive). Have you considered chopping a tandem truck down to single axle?
     
  6. Bdog

    Bdog Road Train Member

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    I have not considered that. Is it hard to do? I have moved axles on our international 4800's before but I really have zero experience with the class 8 trucks.
     
  7. AModelCat

    AModelCat Road Train Member

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    Shouldn't be too bad. If you've got an air ride suspension like Freightliner Airliner for example. You just remove the drive axles and install the rear rear axle in the front position, then trim the frame and re-mount the 5th wheel. That is if you have adequate frame space. If not you may have to re-drill the frame to put the axle in a better spot.
     
  8. Rock 'n Roll Relocater

    Rock 'n Roll Relocater Medium Load Member

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    Yeah.....piece of cake.. :eek:
     
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  9. Bdog

    Bdog Road Train Member

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    That doesn't sound too bad. I have a fully equipped shop and a mag drill if needed. I guess if you just move the rear to the front you can reuse the drive shaft but if you have to drill you will likely need the driveshaft length changed?
     
  10. AModelCat

    AModelCat Road Train Member

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    I tore the entire suspension out of my W9 in the backyard with nothing but a cutting torch, 12 ton bottle jack and my pickup truck lol.

    You will probably have to lengthen the shaft even if you just install the rear drive in the front position. Rear axle has no power divider so its shorter.
     
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  11. Rock 'n Roll Relocater

    Rock 'n Roll Relocater Medium Load Member

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    Yeah...and your name here is 'Northern Mechanic'. Not everybody has the knowledge, place, or tools to do those kinds of things. Kudos to those that do. I have the knowledge but lack the tools and the place. Anyway, good luck Bdog which ever way you decide to go. ;)
     
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