Your X1 rear derailleur would be nothing without this, the X1 shifter and when they are paired together smooth and precise shifting is guaranteed to follow.The X1 shifter is the epitome of trickle down technology and pinches its smooth shifts from the likes of the XX1 and X01 groupsets which have preceded it. The shifter allows you to enjoy Sram’s much loved powerful and precise shifting and this shifter gives you complete control over your wide ratio 11 speed cassette.ZeroLoss simply means, well, zero loss-when you push on the lever, for an upshift or down shift, the cable is engaged instantly-zero loss of movement. There is no middle-ground where you’re waiting for the shift to come. Gear changes are instant and precise.The MatchMaker X clamp is more than just a clamp. It’s like having Martha Stewart tidy up your cockpit. Since each clamp accepts up to three controls, you can put everything from your XLoc suspension lockout, your SRAM shifters and AVID brake levers as well as your Reverb XLoc remote, all on two clamps. Short of genetically engineering longer thumbs, it’s the ideal way to put everything within easy reach. Just like Martha would.