Like its main competitors Shimano and Campagnolo, SRAM has a hierarchy of groupsets with levels offering different weights, number of gears and - of course - prices!
Whilst Shimano and Campagnolo have been producing bike components since the 1920s and 30s, SRAM was only founded in 1987. However, although much younder it has become know for pioneering innovations such as 1x road drivetrains, wide-range cassettes, and wireless shifting.
I will try to keep this groupset list current, please give me a shout if I mess up!
|Weight(g)||Brakes||Rear sprockets*||Chainrings||Low sprocket max teeth**||Electronic|
|RED eTap HRD||2361||Disc||11||2||32||Y|
|RED 22 HRD||2119||Disc||11||2||32||N|
* the more spockets, the smaller the jump between adjacent gears.
** the more teeth, the easier the bottom gear will be.