Try our free RC Gear Recommender App to get an AI-powered recommendation! Just enter your motor and a few other details, and we'll recommend a pinion to start with for your track conditions.
What is the transmission ratio (internal ratio) of the RMX EX S PRO?
The RMX EX S PRO transmission ratio is 3. For help calculating your gear ratio, Final Drive Ratio (FDR), or rollout, try our Gear Calculator Pro App.
How many teeth does the stock spur gear for the RMX EX S PRO have?
80 teeth.
Where can I get parts for the RMX EX S PRO?
Try our partner AMain Hobby. They carry many of the latest cars and trucks.
Try our partner Redcat Racing. They should have what you need!
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