These X9 trigger shifters are an excellent value. If you are looking for a 9 speed trigger shifter and use a SRAM rear derailleur, you should consider these - they are roughly the same weight as XO, offer the similar performance and cost less. Front shifter is designed to work with a triple. but the will work with a double front by locking out the front derailleur limit screw. Shifter cables and housing included and works with SRAM derailleurs only.