ORIGINAL: DVUSHELI
That's what I found on Tamiya's website for the 18T that came with this M-Four kit.
I may just change it over to 48P gears using HPI or Robinson spurs. Hopefully they're the same bolt pattern for the hub.
If you find a 48 pitch spur that fits, it will work. But its easier and cheaper to just buy a 0.6 mod pinion
<br type="_moz" />