SRAM have unveiled two new 11-speed groupsets, dubbed SRAM Red 22 and Force 22, with the former also available with hydraulic rim and hydraulic disc brake options.
according to SRAM : "Adding two more gears to that combination was arguably the only improvement required. The added benefit is that now, without adding weight, we maintain a system that shifts incredibly fast upfront, and with the best and smoothest gear transitions in back. And, for the first time available anywhere, the system gives you twenty-two gears. No compromise and no trim, what we’re calling True 22, in any gear combination."
Gaining an extra sprocket sees SRAM play catch-up to Shimano and Campagnolo by offering at least one 11-speed groupset – more significant, however, are the two new hydraulic braking systems, which SRAM say offer increased power and modulation over traditional, cable-operated brakes.
source : http://roadcyclinguk.com