SharkLife Stampede 4x4 RC Car Pinion and Spur gear upgrades

SharkLife Stampede 4x4 Pinion and Spur gear upgrades 2 of 3 mods today Pinion and Spur Gear was told I should gear it down to 13/54....currently running 21/50....i didn't any better. #Traxxas #Stampede4x4 #Mods #PinionGear #Spurgear #rcracing #rccars #rccaraction