The CCxRC babyGOLIATH™ motor is a 050 can with a .3mod 11 tooth brass pinion that will direct swap with the stock Axial SCX24 motor.  It has the same mounting holes as the SCX24 and pinion size. The goal is to maximize torque while having just enough wheel speed to still climb hills and bounce over trick obstacles. I feel like we've accomplished that with the babyGOLIATH™ in a way that doesn't require you to change motor mounts, pinion sizes, or ESCs. 
 
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If you want a different pinion size, head over to MOFO RC where he sells all kinds of SCX24 hop ups. He has an adjustable motor mount and larger pinions to really customize your experience.