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  1. #1
    RC Racer
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    pivot balls loos

    Hi guys,
    i was out bashing my merv and went home, and at cleaning process i saw the pivot balls just were alot loose, the wheels where alot sloopy and moved a ton. Can this be fix or need to be changed?
    thanks

  2. #2
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Are you still running plastic hollow balls?
    Upgrading mine to steel helped tons...

    Or did you mean the pillow balls in the knuckles?
    That slop can be fixed a few ways... I suggest aluminum knuckles.
    Whatever it is I just said... I could be wrong.

  3. #3
    RC Racer
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    yeah is the plastic stock ones, what number is the aluminum ones?
    thanks

  4. #4
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    7028x... and they are steel, not aluminum. I don't think aluminum would hold up all that well.

    Or did you mean the knuckles?
    Whatever it is I just said... I could be wrong.

  5. #5
    RC Racer
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    yeah i mean the knuckles.. im a noob

  6. #6
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    In my observations, all of the following makes a decent knuckle... with many reported happy users:
    HR, GH, and GPM.

    RPM are hit and miss... some report no issues while others say they popped pillow balls and the bearing hole ovaled over time.
    Whatever it is I just said... I could be wrong.

  7. #7
    RC Racer
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    I'd get the GPM out of those four, and some aluminum retainer caps along with them. The GH ones have plastic retainer screws that like to pop out unless you wrap them in teflon tape. I also like the RPMs too, I haven't really had any issues and I like the design of the retainer cap better than the others.

  8. #8
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    HR come with aluminum retainer caps.
    Whatever it is I just said... I could be wrong.

  9. #9
    RC poster
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    I have RPM knuckles, and am actually glad for the minor popping out factor. If I land my MERV awkwardly from a jump, I'd rather have a knuckle pop loose than to have an A-arm break. When the knuckle pops off the ball, I simply push it back on. For me, it serves as a failsafe. The RPM knuckles, like most aftermarket knuckles are adjustable. The stock knuckles are just too dang sloppy.
    Last edited by TboltBeardie; 02-18-2014 at 11:27 AM.

  10. #10
    RC poster
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    About those RPMs. Do you guys mean that the pivot balls pop out in crash, but stay in quite well even after that and several times? Steel ball through aluminum hole and no damage or difference?

  11. #11
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    RPM knuckles are not aluminum... they are plastic, so no steel balls are going through aluminum holes.
    Whatever it is I just said... I could be wrong.

  12. #12
    RC poster
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    Thanks, now I get it, maybe I'll remember it too...

  13. #13
    RC Qualifier
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    I have the rpm ones and have no issues with them .

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