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  1. #1
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    pinion/spur gearing chart

    Im bored at work...

    So I made this chart, tells you the gear ratios of different pinion/spur combos:

    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  2. #2
    RC Turnbuckle Jr. asheck's Avatar
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    Thats cool,but you did it a different way,at least different then I've seen it done. Divide the big # by the little # 54/9 gearing=6 56/9= 6.2222
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  3. #3
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    will the jato spurs fit on the revo?
    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  4. #4
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    here you go asheck...

    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  5. #5
    RC Turnbuckle Jr. asheck's Avatar
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    Thank you.I just saved a copy of it,should come in handy. Yeah the Jato spurs fit.
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  6. #6
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    I'm currently running a 15t pinion + stock e-revo spur (assuming 68?) in my novak 6.5hv setup with a pair of 2s 7.4v 8000mah lipos. I'm upgrading to the cc setup (mamba max + 2200kv), what kind of gearing do you guys recomend? Thanks!

  7. #7
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    I ran 13/68 for my first run, then put on a 12t pinion, but that was too low. I'm gonna try 14/68 next, I've heard good things about that combo with the HV4.5. When I get my MMM, I'll probably get a 15t pinion and a few spurs to play around with. The 5mm pinions are so expensive, so I'll change the spurs instead.
    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  8. #8
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    I Ran 12/65 last weekend and really liked the Torque, but only about 35mph top end with 7 cells 4600 nimh - Good Run time
    EREVOs, Slashes, 1/16 Slash, EMAXX, VXL Villain

  9. #9
    RC Turnbuckle Jr. asheck's Avatar
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    I'm upgrading to the cc setup (mamba max + 2200kv), what kind of gearing do you guys recomend? Thanks!
    Well I ordered 1 for my buddy,he won't order on line But I got him a 25.I figured 25/68 should be roughly 45 on 4s.
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  10. #10
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    Quote Originally Posted by asheck
    Well I ordered 1 for my buddy,he won't order on line But I got him a 25.I figured 25/68 should be roughly 45 on 4s.
    what if i plan to run a pair of 3s 11.1v 4200mah lipos?

  11. #11
    RC Turnbuckle Jr. asheck's Avatar
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    what if i plan to run a pair of 3s 11.1v 4200mah lipos?
    Well then it's a ? of how fast you want to go,assuming they are good batteries. You can use the calculator to figure out what gearing to use. http://scriptasylum.com/rc_speed/_top_speed.html
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  12. #12
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    Quote Originally Posted by asheck
    Well then it's a ? of how fast you want to go,assuming they are good batteries. You can use the calculator to figure out what gearing to use. http://scriptasylum.com/rc_speed/_top_speed.html
    do u happen to know the e-revo's fr/rr differential gear ratio and transmission gear ratio? haha!

  13. #13
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    ^^^ just use the presets in the pull down
    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  14. #14
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    Hello, I am a current novak user, but I should be receiving my mamba 2200 combo this week. With the novak you are so limited to gearing options that I really don't know where to start with the castle. Currently I have a 68t and 62t spur gear. 12, 13, 14, 15, 20, 22, and the combo comes with a 18t pininon. What would you guys recommend for gearing. I am running spc and ma 2s 8000 packs and will be ordering some 3s packs. I run phaltlines, crimefighter lpr, and mt badlands, depending on the terrain. I mostly bash at construction sites, and around the house. Any advise would be greatly appreciated.

    Thanks,

    Greg

  15. #15
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    i would say start around 68/15 or 68/18 and work from there...

    just watch your temps and youll be fine
    E-MAXX F/S
    N RUSTLER F/S
    NTC3 F/S

  16. #16
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    thanks! I'll give it a try when it comes in.

  17. #17
    RC Turnbuckle Jr.
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    you can easily gear it as high as you have (62/22)....and not have heat issues.

    68/15= 24mph
    68/18= 28mph
    62/22= 38mph

    you may want to consider getting some of the jato spurs (58,56,54) and gear up a bit.

    somewhere around 56/22; USING 4S!...if you go to 6s then gear accordingly

    Differential Ratio: 2.8461538461538462
    Transmission Ratio: 1.8333333333333332
    Other Ratio: 1
    Spur Tooth Count: 56
    Pinion Tooth Count: 22
    Total Voltage: 14.8
    Motor KV: 2200
    Tire Diameter (inches): 5.9
    Tire Ballooning (inches): 0.2
    Motor Current Draw: 110
    Motor coil Ω: 0.006
    Spur/Pinion Ratio: 2.55 : 1
    Total Ratio: 13.28205 : 1
    Tire Circumference (inches): 19.79 inches (502.72 mm)
    Total Motor Speed: 31108 RPM
    Vehicle Speed: 43.9 mph (70.51 km/h)
    Estimated Adjusted Speed: 41 mph (66 km/h) - 6% loss
    Effective KV Value: 2101.89
    KT constant: 0.61 oz-in/A
    Motor Torque: 0.35 ft-lbs
    Final Torque: 4.68 ft-lbs
    Final Power: 1628 watts (2.2 HP)

  18. #18
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    what would the best ratio be for a VXL 4x4 stampede with a 60A ESC and 6.5t brushless motor powered by a 11.1v 3s li-po battery??



    Also my dad recently bought a 6s 22.2v li-po what can that be used in??
    Last edited by Higgy1995; 05-06-2011 at 07:48 AM. Reason: extra

  19. #19
    RC Turnbuckle Jr. asheck's Avatar
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    There's a specific Stampede 4x4 forum. But I'll tell you that a 6.5t on 3s is not going to be happy in the 4x4 Pede. It really needs more motor then a standard 540, and the gearing range will not let you gear for a low enough speed.
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  20. #20
    RC Turnbuckle Jr.
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    As for a random 6s lipo purchase, what spec & brand is is (C rating & mah capacity )?

    It might be useful for a 1/8 scale buggy or truggy, or a nitro conversion MT, but not much else that is ground-based.

    And more importantly- why ask a totally unrelated question in a 3 year old ( dead ) thread? Bad noob, bad...
    Keeping the Mods busy is my specialty...

  21. #21
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    Ah, i forgot to mention its a 6.5t brushless motor, my bad.

    wats wrong with askin random questions anyway, ever herd of freedom of speech.
    i only asked on this thread as i was lookin for pinion-spur ratios, mozzila brought this up, didnt c the age until i posted.

    The battery is an overlander its mah cap. is 3200. I'm not too sure on any other details as its not mine and i didnt get too much of a look at it.

  22. #22
    RC Turnbuckle Jr.
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    Freedom of speech =/= digging up old threads that have nothing to do with your vehicle ( spur/pinion ratios aren't much use without knowing the ratios for the rest of the drivetrain, and even then there are far simpler ways of determining what speed you will go for any given setup: http://www.scriptasylum.com/rc_speed/top_speed.html ). Besides, on the traxxas forum there is no such thing as freedom of speech; this is an authoritarian dictatorship, not a democracy ( of sorts... ).

    The overlander lipos dont tend to have a terribly high C rating as they are generally designed for use in light r/c aircraft- a low-ish mah capacity is fine in a plane or powered glider when you would be timing the run and knowing exactly when to stop flying, but in a ground based vehicle which is subject to much more variation in throttle usage, runtimes would be hard to guess and the surge currents would be much harder on a low-end pack ( shorter life span ).

    TL;DR- lipo is not much good to you as the voltage is too high for most smaller r/c escs, and the capacity would give poor runtimes.
    Keeping the Mods busy is my specialty...

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