I used a 46t from a dbxle. I had to cut off the part that holds the bearing to the front of the spur gear and cut the notches to the center for the pin in the redcat shaft. I have been using it like that for a couple of years now with no issues.It has really cut down on motor temps. I run a leopard 5692 1050kv and a 14t pinion with a max5 esc on 8s.
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