Hobbyking 23T/3.175mm M1 Hardened Steel Pinion Gear. Supplied complete with shaft locking grub screw.
Material: Hardened steel
Finish: Hard coated
To Fit Shaft Size: 3.175mm
I am trying out these M1 types to see if it matches with the old RC Car spur gear that I got in stockA so-so built, not as sturdy as Novak's M1 pinions. Bad news is this can not fit into the trooper, it is too wide :( So, if you are looking to upgrade your trooper, better try smaller ones...