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  1. #1
    RC Racer
    Join Date
    Dec 2012
    Posts
    191

    Spur gear question. 68t vs 65t

    Hello.

    My brother destroyed his spur gear.
    I think stock there is a 65t gear in the E-Revo BL. Traxxas 3960 0.8P 65T

    When i was ordering parts, i managed to order the: Traxxas 3961 0.8P 68T.

    Will it go faster or slower with the 68T gear?

  2. #2
    RC Qualifier
    Join Date
    May 2012
    Location
    la porte
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    651
    Slower. Are you running 4s or 6s


    Sent from my iPhone using My Thumbs
    6S OR NOTHING............................ maybe 5s

  3. #3
    RC Turnbuckle Jr.
    Join Date
    Mar 2012
    Location
    so cal
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    9,244
    I would go for the 54 t !
    Bigger spur is less top end and bigger pinion is more top end

  4. #4
    RC Racer
    Join Date
    Dec 2012
    Posts
    191
    He is running 4S now.
    His kid is also dring it, so it might just be OK for them.

    Getting the 68t tomorrow, and the 65t the day after that.

  5. #5
    RC Turnbuckle Jr. rjm2519's Avatar
    Join Date
    Feb 2008
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    Fl
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    3,062
    I have learned that it is always good to have an assortment of spurs and pinions, for situations like that and just for a change once in a while.
    Donít handicap children by making life easy

  6. #6
    RC Qualifier
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    May 2012
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    la porte
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    I would at least get a 58t. 18/68 is very slow


    Sent from my iPhone using My Thumbs
    6S OR NOTHING............................ maybe 5s

  7. #7
    RC Enthusiast
    Join Date
    Mar 2013
    Posts
    24
    My ERBE came with a 65T installed and a 54T in the box. Just throw that one on there. I'm on 6S power but even on 4S the motor has enough torque to not need a giant spur gear like the 65 and 68. I'm currently at 18/54 but will be putting the 20 tooth pinion gear on soon for 20/54. For what it's worth, just have a handful of spur gears on hand since your car will probably eat them all. Don't get a metal one either, it's better for your $3 spur gear to get trashed than your motor or transmission! I'd also keep a slipper clutch rebuild kit on hand so when you destroy it you don't have to make yet another trip to the hobby store/wait for days for the part to arrive.

  8. #8
    RC Racer
    Join Date
    Dec 2012
    Posts
    191
    Well, the 68T Spur gear where not physical space for it! touched the chassie. 65T now!

  9. #9
    RC Qualifier
    Join Date
    Jan 2013
    Location
    The Netherlands
    Posts
    851
    With a properly set gear mesh the spur gear can last very long, the only real problem is the motor mount flex on big jumps. Because of the flex the pinion will strip the spur gear. When you start doing big jumps and this occurs, the HPP motor mount will solve this issue.

  10. #10
    RC Turnbuckle Jr. MITCH316's Avatar
    Join Date
    May 2012
    Location
    Australia
    Posts
    3,259
    I'm running 20/54 at the moment...68T should fit...I'm running one in my Summit, its the same chassis as the eRevo.
    Rock n Rolla !

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