Shimanos new XT-level 10-speed front derailleur (Dual pull; clamp type or direct mount) specifically designed to work with their Dyna-Sys 10 speed drivetrain. Shimano developed Dyna-Sys with the goal of increasing rider efficiency. This means closer ratios smoother shifts & a more stable pedal stroke. Specific 10-speed cage design Adaptable clamp means one size fits all for 28.6 31.8 34.9 & multi-pull allows top- or bottom-cable pull Set screws are angle outward for easier adjustment on some full suspension designs Clamp band positions is the same for 9s & 10s versions Cage profiled for more tire clearance