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  1. #1
    RC Racer
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    Aug 2013
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    Gearing question!

    Hello everyone, Iím going to be running the Leopard 1050KV brushless motor on 8s paired with the hobbywing max5 ESC and SMC 9200mah 90c lipos. This is in the 8s version X-Maxx. Iím not quite sure how to gear it though. Iíd like to be in the 60-70mph range. Could anyone suggest what tooth count I should run for spur gear and pinion? Thanks!!!


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    Last edited by pontiacHP; 10-13-2017 at 08:20 AM.

  2. #2

  3. #3
    RC Racer
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    Aug 2013
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    Thanks for the reply, That's a really cool site! I dont know what the ratio of the cush drive is however? Im sure it would make a difference.

  4. #4
    RC Racer Magnus001's Avatar
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    I have a similar setup, but I only have the Traxxas batteries. I currently use a 54t spur, & 32t pinion. My motor & esc barely even get warm with that. It's got plenty of room to go taller gears if you want to.
    V1 6s w/8s conversion
    Max5 Leopard 1090kv

  5. #5
    RC Racer
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    Quote Originally Posted by Magnus001 View Post
    I have a similar setup, but I only have the Traxxas batteries. I currently use a 54t spur, & 32t pinion. My motor & esc barely even get warm with that. It's got plenty of room to go taller gears if you want to.
    Great info thank you for the reply! Thatís exactly what Iím looking for, low temps! With the gearing youíre running, Is your truck way faster than the stock 8s?
    Do you happen to know if Mod1 and Mod1.5 gears are interchangeable? Thanks!


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  6. #6
    RC Racer Magnus001's Avatar
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    My truck is maybe 8-10 mph faster than stock, depending how straight I can keep it. It definitely has WAY more torque. I haven't played with the gearing. I bought my motor/esc combo from Kershaw Designs & just put it in, & left it. My dad has a stock 8s setup, & he's trying to get it as fast as mine, so I might have change my spur gear to a 50t soon, lol. I have no idea if mod1 & mod1.5 are similar...
    V1 6s w/8s conversion
    Max5 Leopard 1090kv

  7. #7
    RC Racer
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    I wish Kershaw was still around, I canít find 8mm Mod1 pinions anywhere! Does anyone know where to get them??


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  8. #8
    RC Racer
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    Apr 2011
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    I like to know to, nead some 8mm pinion.

  9. #9
    RC Racer
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    I wonder if one could drill out a 5mm pinion to 8mm?


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  10. #10
    RC Racer
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    Sep 2016
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    Quote Originally Posted by pontiacHP View Post
    I wonder if one could drill out a 5mm pinion to 8mm?


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    Sage Custom Rc has them, Daves Motors has them, castle creations even sells them.
    de oppresso liber

  11. #11
    RC Racer
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    Awesome thanks for the info! Greatly appreciated!


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  12. #12
    RC Racer Magnus001's Avatar
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    I think I already know the answer, but I'll ask anyway, since I don't know for sure. Would a mod1.5 pinion work with a mod1 spur, or would it just tear it up?
    V1 6s w/8s conversion
    Max5 Leopard 1090kv

  13. #13
    RC Racer
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    Aug 2013
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    I wonder the same. I thought the mod1.5 is just wider than the mod1. I am unsure though.


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