- Derailleur brands: SRAM
- Categories: SRAM - the Red story
- Themes: Electric Avenue
- Country: USA, manufactured in Taiwan
- Date of introduction: 2015
- Date of this example: manufactured 2014? (serial number starts 1421... possibly indicating week 21 2014?)
- Model no.: RD-RED-E-A1
- Weight: 239g including battery
- Maximum cog: 28 teeth (SRAM)
- Total capacity: 28 teeth (bikeshop folklore)
- Pulley centre to centre: 55mm
- Index compatibility: 11 speed
- Chain width: 3/32”
- Logic: top normal
- B pivot: unsprung
- P pivot: sprung
- Materials: largely aluminium with a composite p-knuckle and a carbon cage
Ref. 1658