Rears

Discussion in 'Ask An Owner Operator' started by Knightcrawler, Oct 7, 2019.

  1. Knightcrawler

    Knightcrawler Heavy Load Member

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    Ordering a Western Star 5700 with a DD15 475/505 HP and an Eaton FRO-17210c. 22.5in tires.

    I run mostly flatlands, Minnesota to Ohio. I dont go east coast and I dont go west of KC. Rare is it I go south of Indy. I prefer to run around 70mph rather than crawling at 60. Also I rarely haul anything more than 25k and usually under 10k. What kind of rears should I get to be turning about 1300rpm at 70mph?

    Not smart enough to figure out these #### calculators :p
     
    Last edited: Oct 7, 2019
    Bean Jr. Thanks this.
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  3. Trucker186

    Trucker186 Medium Load Member

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    1400 at 68 mph is what I like for power at least and good mpg. Go online and find a calculator also I believe 22.5 standards are about 42 in. overall.
     
  4. Opendeckin

    Opendeckin Medium Load Member

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    3.36 with tall 24s would probably do it.
     
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  5. Studebaker Hawk

    Studebaker Hawk Road Train Member

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    I am certain your dealer can tell you exactly what you need. If you don't trust their numbers, don't buy a truck from them.
     
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  6. Long FLD

    Long FLD Road Train Member

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    Agreed. He should be talking to his dealer and not random guys on the Internet. If it were me and I was hauling light in the Midwest I’d go DD15/DT12/2.xx rears.
     
    Diesel Dave and dunchues Thank this.
  7. Cat sdp

    Cat sdp . .

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  8. Knightcrawler

    Knightcrawler Heavy Load Member

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    Not talking to random guys on the internet. Some of the people on this site know more about some of this #### than the guys that designed it :p

    And I wouldnt put an automatic in YOUR truck much less mine :D
     
  9. rank

    rank Road Train Member

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    If you keep talking like that I’m going to start following you lol
     
  10. Long FLD

    Long FLD Road Train Member

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    If I was running light and flat I’d let you buy me one. Lol. I agree some salespeople are turds. I’m in that boat right now trying to spec what I want.
     
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  11. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Two of our Cascadias have 3.25's. 1300 rpm is 63 mph.
     
  12. mhyn

    mhyn Road Train Member

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    and when they hit little hill driver goes down to 6th gear?
     
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