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  1. #1
    Member
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    Oct 2016
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    Channahon, Illinois
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    259

    Tandem Axle Trailer Question

    I am planning on doing the Dexter EZ Flex equalizer upgrade when I get the boat out of storage and want to order the parts before hand. Does anybody know the spacing between the axles? There is a 33" kit (K71-652-00) and a 35" kit and want to make sure I get the correct one. Thanks.
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  2. Member
    Join Date
    Dec 2009
    Location
    Louisville, Ky.
    Posts
    34
    #2
    The 33" is the one you need and I highly recommend this kit, makes a world of difference. Just did my 2020 Z21 a few weeks ago and my cousins 2017 Z21. Just use two floor jacks if you can, makes it way more manageable. Good luck!

  3. Member
    Join Date
    Oct 2016
    Location
    Channahon, Illinois
    Posts
    259
    #3
    Thank you.
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  4. Nitro Boats Moderator BMCD's Avatar
    Join Date
    Jun 2004
    Location
    Brookeland, Texas
    Posts
    17,440
    #4
    Did mine as soon as I got the boat. Its been great, very little noise coming from the trailer.
    Bryan McDonough
    2023 Nitro Z21 XL
    Nitro Team

  5. Member
    Join Date
    Sep 2016
    Location
    Spanway, WA.
    Posts
    98
    #5
    Where is the best place to buy the kit for a 2019 Z20. Model or part#? Thanks

  6. Member
    Join Date
    Mar 2014
    Location
    San Diego, CA
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    2,444
    #6
    Quote Originally Posted by rvan View Post
    Where is the best place to buy the kit for a 2019 Z20. Model or part#? Thanks
    K71-652-00

    You might find it cheaper elsewhere but I purchased mine from Amazon: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
    Chris

    2020 Nitro Z19 Pro w/ 200 ProXS

  7. Member
    Join Date
    Nov 2018
    Location
    Fort Worth, TX
    Posts
    480
    #7
    I did this upgrade over the weekend. I noticed that one of the bushing holes in one of the springs was larger than it should have been. Whoever built the trailer put a fatter plastic bushing in that hole. The replacement metal bushing fit loosely in that spring, which I did not like. Hopefully your trailer doesn't have that problem.

  8. Member LWortham's Avatar
    Join Date
    Mar 2005
    Location
    Shawnee
    Posts
    75
    #8
    I am also going to do this to my trailer. I did find it cheaper here, hope this helps.

    https://www.easternmarine.com/dexter...kit-k71-652-00

  9. Member
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    Sep 2016
    Location
    Spanway, WA.
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    98
    #9
    Thanks for the replies. Much appreciated..

  10. Member
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    Sep 2016
    Location
    Spanway, WA.
    Posts
    98
    #10
    Just ordered the kit. Thanks again

  11. Member
    Join Date
    Oct 2016
    Location
    Channahon, Illinois
    Posts
    259
    #11
    Just had the install completed. Did anyone else have to add spacers to the fenders due to losing about 3/4" of spacing? My tires are literally 1 mm from the fenders now.
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  12. Member
    Join Date
    Mar 2014
    Location
    San Diego, CA
    Posts
    2,444
    #12
    Quote Originally Posted by bison2312 View Post
    Just had the install completed. Did anyone else have to add spacers to the fenders due to losing about 3/4" of spacing? My tires are literally 1 mm from the fenders now.
    I did not experience a change in tire clearance after this upgrade. The dexter shackles were the same length as the existing shackles and the vertical height of the new equalizer was the same as the old equalizer. Can you determine what specific parts caused you to lose clearance?
    Chris

    2020 Nitro Z19 Pro w/ 200 ProXS

  13. Banned
    Join Date
    Dec 2020
    Location
    Arizona
    Posts
    307
    #13
    DO YOU ONLY NEED ONE OF THOSE TANDEM AXLE KITS?

  14. Member
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    Mar 2014
    Location
    San Diego, CA
    Posts
    2,444
    #14
    Quote Originally Posted by Arizona Angler View Post
    DO YOU ONLY NEED ONE OF THOSE TANDEM AXLE KITS?
    Yes, just one kit includes everything you need.
    Chris

    2020 Nitro Z19 Pro w/ 200 ProXS

  15. Member
    Join Date
    Oct 2016
    Location
    Channahon, Illinois
    Posts
    259
    #15
    Quote Originally Posted by C0MRAD View Post
    I did not experience a change in tire clearance after this upgrade. The dexter shackles were the same length as the existing shackles and the vertical height of the new equalizer was the same as the old equalizer. Can you determine what specific parts caused you to lose clearance?

    I'll look over the parts and see what is different. I will say that with only 6000 miles of towing the stock shackles were already ovaling.
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  16. Member
    Join Date
    Sep 2009
    Location
    joliet
    Posts
    4,197
    #16
    My mechanic just told me the above kit that everyone mentions has the wrong equalizer. Bison who installed your kit?
    Last edited by jasonG; 04-02-2021 at 05:02 PM.
    Nitro z21

  17. Member
    Join Date
    Oct 2016
    Location
    Channahon, Illinois
    Posts
    259
    #17
    Quote Originally Posted by jasonG View Post
    My mechanic just told me the above kit that everyone mentions has the wrong equalizer. Bison who installed your kit?
    That's messed up, I got the 33" on center kit which my axles are.

    Joliet Suspension off Larkin did the work.
    Last edited by bison2312; 04-02-2021 at 05:19 PM.
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  18. Member
    Join Date
    Sep 2009
    Location
    joliet
    Posts
    4,197
    #18
    Ok maybe I’ll reach out to them. I had a bad encounter with them in the past they tried to charge me 3x the price on a install compared to others. Also hate to do all this them destroy my tires trying to get home if it squats
    Nitro z21

  19. Member
    Join Date
    Oct 2016
    Location
    Channahon, Illinois
    Posts
    259
    #19
    After they did it they called me to say the clearance was decreased and they wouldn't let me take it until something was done so I told them to raise the fender. I am not sure of the charge since I still don't have my boat. Went there because they were recommended to me by 2 people. Are you trying the k71-653 equalizer?
    2017 Nitro Z21
    2017 250 Pro XS T2 (SN 2B401909)
    Bravo 1XS 26P
    BMS 12" Action Jack
    Ultrex 112# - Solix 12 - 12' Talons

    Club: lunkersunlimited.net

  20. Member
    Join Date
    Sep 2009
    Location
    joliet
    Posts
    4,197
    #20
    K7165200 which everyone recommends on here and facebook. It’s at dc marine he said he never installed this kit but has changed parts all the time
    Nitro z21

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