Brushless Gear Drives


  • Strong and durable, with aluminum frames, steel shafts, brass pinion gears and nylon spur gears.
  • Mounts directly to Great Planes® brushless motor mount.
  • All include a prop saver or adapter, two pinion gears, mounting hardware and a spur gear (two in GPMA0505-0515).
gear drive
GPMG0495
for 12 mm Ammo motors


gear drive
GPMG0500
for 20 mm Ammo motors


gear drive
GPMG0510
for 28 mm Ammo motors



Gear Drives
Stock # Description Approx. Weight Motor Mount Pinions Included Pinion Shaft Diameter Spur Gears Included Output Shaft Dia. Included Ratios
Ratio #1 Ratio #2 Ratio #3 Ratio #4
GPMG0495 for 12 mm Ammo motors 7 g (0.24 oz) Direct mount* 9T, 12T 1.5 mm 64T 3 mm 7.1:1 5.3:1 n/a n/a
GPMG0500 for 20 mm Ammo motors 12 g (0.42 oz) Stick/Included with gear drive 10T, 12T 2 mm 64T 3 mm 6.4:1 5.3:1 n/a n/a
GPMG0510 for 28 mm Ammo motors 34 g (1.2 oz) Medium* 11T, 16T 3.175 mm 40T, 50T 5 mm 4.5:1 3.6:1 3.1:1 2.5:1

Note: The gear drive GPMG0500 installs on a 10 x 10mm stick
Note: The gear drive GPMG0495 can be mounted to either a firewall or a motor mount
*Mount is not included.