brushless upgrade on ECX Ruckus

bamber1

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I have just gone brushless in my ruckus a goolrc 4600 kv but need a bigger pinion to gear it up already put traxxas vxl drive shafts on it kept breaking the original ones i ordered a 21t 48 pitch pinion but the teeth seem to course so i though i would ask to see if it is the right one if not what do i need ?
 
I have just gone brushless in my ruckus a goolrc 4600 kv but need a bigger pinion to gear it up already put traxxas vxl drive shafts on it kept breaking the original ones i ordered a 21t 48 pitch pinion but the teeth seem to course so i though i would ask to see if it is the right one if not what do i need ?

Can you post a picture of you drive shafts I'm looking for some too and how do they work.
 
I tried putting a 24t pinion on my modified brushless Ruckus but it rubs on the housing. The stock brushless comes with a 24t so I'm not sure why it won't fit. I might carve out the hole a little but the 19t is plenty fast for me right now.
 
I ended up putting the 24t back on. I spaced it out enough to keep it from rubbing and it's working great.
 

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