The most technologically advanced fork we have ever made. Lightest weight in the category, largest travel range (140-170), easiest travel adjustment with all components included. Dorado Air Active Spring Piston with IRT is the highest tech air spring system with the most adjustability. Active Spring Piston is a small coil spring that the Dorado Air piston rides on, it gives the fork the lowest initial break away force and smoothest quickest response to direction changes of the fork. The IRT allows for the highest level of air spring adjustability, giving unmatched mid stroke support. MC² PRO-X Damper with Air Backed Bladder is the lightest weight solution with 4 way external adjustability to fine tune the damping characteristics of the fork across a wide range of riders and conditions.