Compatible with motors measuring:

Width: 26mm (1")

while beefing up the leading edge hinge pin support to add some much needed strength and durability

7" (272mm)

listed under part number LOS230079

Powerhobby Hardened Steel 42T Mod1 5mm Pinion Gear Mod 1 Speed Run / Drag Racing HO Couplers Compatible with motors measuring:Powerhobby Hardened Steel 42T Mod1 5mm Pinion Gear with 2 Grub Screws Description Fine tune your RC vehicles gearing with a Powerhobby Hardened Steel Mod 1 Pinion Gear. Designed for motors with a 5mm shaft, these gears provide the strength and durability needed for high power RC cars, trucks, speed run vehicles, and drag racing applications. Each pinion features two set screw holes for a more secure attachment to the motor shaft. Two M4 grub screws