schindelhauer bikes - Automatic gearing - how does it work? The SRAM Automatix 2-speed hub automatically shifts up a gear when you reach speed of around 16 km/h. When you slow down
New Auto Shifting SRAM 2-Speed Hub | Hubstripping.com
For Sram Automatix Automatic Transmission Hub Inner Two-speed Bicycle V Brake Hub For Bicycle Modification - Wheels - AliExpress
SRAM Automatic 2-speed Hub Coaster Brake, 36-Hole, 120mm Over-Locknut, 19T Cog | Tree Fort Bikes