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  1. #1
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    Specs for monster jam gears?

    What is the original gearing used for son uva digger? Anyone? I just bought a stampede of of craigslist and the spur gear is huge so I want to bring it back down to stock or "Diggers" cooler gearing. Thanks in advance it is for my 7 year old so wheelie popping action would be better where we live than 30 mph into whatever crosses his path.

  2. #2
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    Are you sure your talking about the spur gear?

    Smaller pinion = more torque less speed

    Larger pinion = less torque more speed

    Smaller spur = less torque more speed

    Larger spur = more torque less speed
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  3. #3
    RC Turnbuckle Jr. rag6's Avatar
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    Original gearing is 19/90. If you are usong the titan, drop down to a 16 tooth pinion. It will keep that motor cool, improve its life span, and get the top speed down just a bit to reduce breakage. Wheelies galore.

    Also pick up an RPM stampede or slash bumper.

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  4. #4
    RC Turnbuckle Jr. kdvanb's Avatar
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    Quote Originally Posted by rag6 View Post
    Original gearing is 19/90. If you are usong the titan, drop down to a 16 tooth pinion. It will keep that motor cool, improve its life span, and get the top speed down just a bit to reduce breakage. Wheelies galore.

    Also pick up an RPM stampede or slash bumper.

    Welcome to the forum!
    Or 12/90
    Even more wheelies!
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  5. #5
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    Hows yer mesh with 12/90? Ive got a couple at 15/86 and i thought that was about as low as i could go.

  6. #6
    RC Turnbuckle Jr. kdvanb's Avatar
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    Quote Originally Posted by dugsguns View Post
    Hows yer mesh with 12/90? Ive got a couple at 15/86 and i thought that was about as low as i could go.
    It was good
    The pinion was Robinson racing
    The spur is traxxas
    Slash 2wd, Slash 4x4, 30th digger, Rustler VXL

  7. #7
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    thanks alot!

  8. #8
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    thanks for the help!

  9. #9
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    Just bought a son-uva digger last night, stock gearing was 90/14 and came with 19t optional pinion, Very odd since my stampede came 90/16 stock with a 21t optional pinion.

  10. #10
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    Weird, my pede was 17/90 stock. Im wondering if when peeps buy rollers off the bay that have the "included" gears that they could be just what that particular chopshop has lying around.

  11. #11
    RC Turnbuckle Jr. kdvanb's Avatar
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    My 30th came 16/90 stock
    Slash 2wd, Slash 4x4, 30th digger, Rustler VXL

  12. #12
    RC Turnbuckle Jr. DiggerPede's Avatar
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    As far as I know the XL-5/ MJ models come 19/90 stock with optional 23T. Like rag said you want to gear down to 16T with the Titan.
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  13. #13
    RC Turnbuckle Jr. rag6's Avatar
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    If traxaxs is including smaller pinions with these 2wd brushed pedes, it is long overdue.
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