This Planetary Gear Assembly is a universal fit for all Currie Electric Bikes, and USPD Pro-drive Convertion Kits. This part is OEM from Currie Technologies, and can be used with our 400w Hikol brushless bike motor, or our 1000w BMC Power pack bike kit as well. We also sell 19t sprockets with the star shaped shaft for this part. sk-pgExtras: None400w-HiKol(+$159.95)1000w-BMC/No-Controller(+$199.95)1000w-BMC/w-Controller(+$349.95) Gearing: None19t-Sprocket/Star-Shaft(+$29.95) Home | New Arrivals | Nintendo Wii | Playstation 3 | Electric Scooters | Scooter Parts | Electric Bikes | Schwinn Scooters | Ezip Scooters | Xbox 360 | Nintendo 3DS | Tablets | Ipad2 | Tablets | Shipping | FAQ | About Us | Scooter Laws | Warranty & Returns | Show Order