Compatible with only single chainring crankset. Rear derailleur is a special 7-speed type, single tension design, with normal top tensioning. 11T pulleys, sealed, 15T capacity. Air tank has schrader valve. Tank cage 500cc.
System comes with two airtanks.
Perfect item for the touring mountain biker. Shifting out at the end of your bar ends while tucked in a more aero position. Servo-Wave action is freely adjustable to rider preference. Compatible with 8sp. Rear shifter is 951.