TAMIYA PINIONS 12T 13T H.P. STEEL PINION SUITS NISSAN KING CAB HI-LUX MONSTER, GR.C CARS, 2WD ON ROAD CARSThis is an Optional Set of Pinion Gears for Tamiya Vehicles. The pinion gear attaches directly to the motor shaft. FEATURES: Machined steel construction INCLUDES: One 12 tooth pinion gear One 13 tooth pinion gear Three 3mm grub (set) screws One allen key (hex wrench) REQUIRES: Nothing. These are direct fit parts. SPECS: Pitch: 0.4 Module COMMENTS: The pitch of these gears is a metric pitch, and will NOT work on most other brands that use a standard pitch gear train.