Robinson Racing Extra Hard Steel 5mm Bore Mod1 Pinion gears were developed for 1/8 scale applications and fit most 1/8 scale nitro spur gears perfectly. They are available in a variety of tooth count options to fine tune the torque and top speed of your model. Package includes one pinion gear and one 4x4mm set screw.
Monday, Aug 26 2019 (about a year ago)
Robinson Racing Extra Hard Steel Mod1 Pinion Gear w/5mm Bore (17T)
Otherwise seems good, but for Hobbywing G2 1900kV motor this pinion hole size is too big. Had Ruddog pinion with the same issue. Arrowmax are tight enough
Wednesday, Jul 23 2014 (about 6 years ago)
Robinson Racing Extra Hard Steel Mod1 Pinion Gear w/5mm Bore (16T)
very strong, high quality steel, excellent built and cut ....
Wednesday, May 22 2013 (about 7 years ago)
Robinson Racing Extra Hard Steel Mod1 Pinion Gear w/5mm Bore (20T)
Meh. It is built well, but the grub screw is smaller than other brands. I like being able to use these over and over, so on my list the Tekno pinions are above the Robinson pinions in overall quality. Still does the job though.