This tensioner works perfect.
Diameter of my frame tube is 32mm. If your frame is wider use longer DIN7991 m5 screws
You also need:
| chain_tensioner_bottom.stl | 224.8KB | |
| chain_tensioner_top.stl | 254.3KB | |
| holder_1.stl | 310.9KB | |
| holder_2.stl | 454.4KB | |
| holder_3.stl | 287.5KB |
