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  1. #1
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    Monster Slash 2WD CC SCT 3800kv Gearing

    I recently bought a slash 2wd and purchased the Castle Creations SCT 3800kv along with 2.8 duratrax lockup tires. I am only driving it around my yard in the grass and dirt along with a lot of ramping. I was curious which gearing is best for this setup. Im mostly wanting low end but would like a little bit of high end. I only run a Traxxas 5800 2S. Thank you in advance

  2. #2
    RC Qualifier spunkybob's Avatar
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    Not sure what is stock, but when I had 2.8s on my 3800 I ran 15/90 and it was fine for temps.

    Remember bigger wheels = more speed per turn of the motor.

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  3. #3
    RC Turnbuckle Jr. rag6's Avatar
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    You can gear a good bit higher than that. I ran 32p gears and ran 58/16 on hottest days. That is 3.63:1 ratio. Comparable 48p gearing would be 86/24 which is 3.58. that gearing got me near 40mph on 2s. If your running 3s you will need to gear down a good bit.

    This suggestion is just a starting point, you must check temps and adjust for your situation.
    Ya can't polish fertilizer...

  4. #4
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    Should I just gear it as if it were a stampede with the same motor? Castle recommends stampedes to be set at 86/16-20

  5. #5
    RC Qualifier spunkybob's Avatar
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    Quote Originally Posted by Fozzy1155 View Post
    Should I just gear it as if it were a stampede with the same motor? Castle recommends stampedes to be set at 86/16-20
    Maybe.. but a stampede is much smaller and lighter.

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  6. #6
    RC Turnbuckle Jr. rag6's Avatar
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    I wasn't considering the sidewinder esc when I posted that gear set above. While the 3800 motor can handle much taller gearing than what cc recommends, the sidewinder esc cannot. I was using a mamba max pro esc. If you gear the sidewinder esc as tall as my recommendation above, you could overwork it. Sorry for the bad advice.
    Ya can't polish fertilizer...

  7. #7
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    Quote Originally Posted by rag6 View Post
    I wasn't considering the sidewinder esc when I posted that gear set above. While the 3800 motor can handle much taller gearing than what cc recommends, the sidewinder esc cannot. I was using a mamba max pro esc. If you gear the sidewinder esc as tall as my recommendation above, you could overwork it. Sorry for the bad advice.
    Actually i run my sidewinder 83/21 with 2.8 trenchers without problems. I think that cold weather helps a lot xD.


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  8. #8
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by alexsasax View Post
    Actually i run my sidewinder 83/21 with 2.8 trenchers without problems. I think that cold weather helps a lot xD.


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    The Pede is a lighter RC, to take this into account when gearing. And, like Rag6 said, check motor temps, it is a good idea whenever you make changes to your drive train (including tires). Generally you want your motor temps < 160*/f.
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  9. #9
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    Quote Originally Posted by Greatscott View Post
    The Pede is a lighter RC, to take this into account when gearing. And, like Rag6 said, check motor temps, it is a good idea whenever you make changes to your drive train (including tires). Generally you want your motor temps < 160*/f.
    I am checking my temps often. Never even close to 140. As I said maybe cold weather and cooling fan helps?


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