thepronghorn
1 kW
Inspired by FZBob's RC Mid Drive with Single Stage Reduction, I wanted a similar lightweight setup for the roads with a little more power. By running the chain all the way to the rear wheel, I can get similar motor torque and gearing to FZBob in his middle gears while still being able to pedal along in my highest gear.
6374 motor running through a #25 12:134 reduction to a custom sprocket adapter
Custom 3d printed compression 8S4P battery with Samsung 25R cells
Castle Creations HV80 controller
The system weighs about 2kg or 4.5lbs without the battery. The battery adds another 2kg.
![full bike.jpg full bike.jpg](https://endless-sphere.com/sphere/data/attachments/157/157644-92be5663c8995ad15a56714c1a64253e.jpg)
![motor mount.jpg motor mount.jpg](https://endless-sphere.com/sphere/data/attachments/157/157645-4aa32cf9c8fc1e936c595652e4d165b2.jpg)
![rear sprocket assembly.jpg rear sprocket assembly.jpg](https://endless-sphere.com/sphere/data/attachments/157/157646-287a3cb8dbf6dab905eea53778671fac.jpg)
![disc sprocket assembly.PNG disc sprocket assembly.PNG](https://endless-sphere.com/sphere/data/attachments/157/157647-a9f35dc6d1fda580b35855abb3ec66aa.jpg)
![battery top.jpg battery top.jpg](https://endless-sphere.com/sphere/data/attachments/157/157643-b262af3571f393f1713d82f9cd8bde54.jpg)
![battery cells.jpg battery cells.jpg](https://endless-sphere.com/sphere/data/attachments/157/157642-45a1cc9fb20360584dd942b8b0df9fa9.jpg)
6374 motor running through a #25 12:134 reduction to a custom sprocket adapter
Custom 3d printed compression 8S4P battery with Samsung 25R cells
Castle Creations HV80 controller
The system weighs about 2kg or 4.5lbs without the battery. The battery adds another 2kg.
![full bike.jpg full bike.jpg](https://endless-sphere.com/sphere/data/attachments/157/157644-92be5663c8995ad15a56714c1a64253e.jpg)
![motor mount.jpg motor mount.jpg](https://endless-sphere.com/sphere/data/attachments/157/157645-4aa32cf9c8fc1e936c595652e4d165b2.jpg)
![rear sprocket assembly.jpg rear sprocket assembly.jpg](https://endless-sphere.com/sphere/data/attachments/157/157646-287a3cb8dbf6dab905eea53778671fac.jpg)
![disc sprocket assembly.PNG disc sprocket assembly.PNG](https://endless-sphere.com/sphere/data/attachments/157/157647-a9f35dc6d1fda580b35855abb3ec66aa.jpg)
![battery top.jpg battery top.jpg](https://endless-sphere.com/sphere/data/attachments/157/157643-b262af3571f393f1713d82f9cd8bde54.jpg)
![battery cells.jpg battery cells.jpg](https://endless-sphere.com/sphere/data/attachments/157/157642-45a1cc9fb20360584dd942b8b0df9fa9.jpg)