X Glide is the common denominator that gives 2X10 unmatched shifting performance. Four identical upshift locations, ready to be be picked up by any outer link. Result Perfect timing, almost instaneous shifts, up or down, even under load. X Glide 3X10 shifting technology, 22 33 44 gearing. The widest gear range available. X Glide Technology. Fastest front shifting ever. 44 33 22 Gear ratio chainrings. The speed of a real big ring with 7.8 meters per revolution 44 11. The climbing ability of a real granny ring with 1.3 meters per crank revolution 22 36.