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  1. #1
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    Question 72t Spur Gear + 22t Bell Housing?

    Hello All,

    I just finished putting the 2.5 Rusty back together. I installed the 22t Bell Housing. When I was cleaning up and going thru the spare parts I have around the house, I noticed I had a 72t Spur Gear...Not sure where it came from, but I probably bought it awhile ago and forgot to install it...

    Anyways, now I have the 22t Bell Housing installed, I wanted to knwo if there were any advantages/disadvantages to having the 22t Bell Housing with the 72t Spur Gear....

    The lhs guy said you do one or the other...not both...but he didnt tell me why.

    THanks

  2. #2
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    Isn't 72 the stock spur?
    Nitro Rustler 2.5 // Savage 3.5

  3. #3
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    I thought 70 was the stock gear...If 72 is stock, I have 70t and a 22t bell housing currently...

  4. #4
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    Well, whatever you have, fewer teeth on spur and more teeth on slutchbell mean that you have a lower gearatio which means faster top speed but less acceleration.

    There is nothing wrong with that gearatio, no matter if you have 72t or 70t spur.
    Nitro Rustler 2.5 // Savage 3.5

  5. #5
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    I currently have the 70t Spur Gear and 22t Bell Housing on the car.

    I found the 72t last night, so I wanted to know what it would do as far speed is concerned if I had the 72t Spur Gear and the 22t Bell Housing.

    Does that make sense?

  6. #6
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    Going from the 70t spur to 72t would give you better acceleration, but less top speed. But this difference is very minimal i think. If you do alot of speed runs, use the smaller spur, if you do alot of quick donuts, hillclimbing and jumping, you might wanna use the bigger spur and even use a smaller clutchbell.
    Nitro Rustler 2.5 // Savage 3.5

  7. #7
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    Thank you for your response!

  8. #8
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    just to clear this up. the stock spur is a 70t and the 72t comes with the rusty if you want to change it

    EDIT: ill post this again just for the heck of it


    oh and nitrobilly a 22/72 would give better top speed
    Last edited by Head-Hunter; 09-15-2004 at 02:15 PM.

  9. #9
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    And less acceleration.

    The chart!! Yey!!
    Ever notice how it's a penny for your thoughts, yet you put in your two-cents? Someone is making a penny on the deal!
    -- Steven Wright

  10. #10
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    yup, forgot to mention less acceleration

  11. #11
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    Im always there to pick up where you left off!
    And vice versa.

    Chart=Good Stuff!
    Ever notice how it's a penny for your thoughts, yet you put in your two-cents? Someone is making a penny on the deal!
    -- Steven Wright

  12. #12
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    lol. cant go wrong with that.
    i have a chart for the electric 4-tec too

  13. #13
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    Originally posted by Head-Hunter
    oh and nitrobilly a 22/72 would give better top speed
    Not if he is using 22/70. Bigger spur = lower ratio = less top speed/more acceleration

    But if you mean from stock 20 clutchbell, then yes. Bigger clutchbell = higher ratio = higher top speed/less acceleration
    Nitro Rustler 2.5 // Savage 3.5

  14. #14
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    Thank you to all that replied.

    HH,

    Thank you for that chart...I am going to save that...

    Shane

  15. #15
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    lol. no problem. that thing is floating around about 20 threads thanks to me and DD

  16. #16
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    Keep up the good work!

  17. #17
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    lol, we are the chart posting machines.
    That along with links to RD and how to post pictures, and other things like that, lol.

    Well, let us know which gearing you go with and how you like it!
    Ever notice how it's a penny for your thoughts, yet you put in your two-cents? Someone is making a penny on the deal!
    -- Steven Wright

  18. #18
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    Is there a 24 or 26 bell that will fit the 3.3 ? I did a 3.3 conversion and with the extra power I want to maximize. I was thinking 24t and 66t......for the rustler
    Last edited by TonytheGreek; 03-15-2016 at 01:26 AM.

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