RockShox's SID line may be considered the skinnier, lighter younger sibling amongst its big, brash all mountain family members like the Pike, but with the SID RL Solo Air 120 Boost Fork, Rock Shox has shown that the XC discipline isn't isolated from the fluidity the sport is experiencing as a whole. With current trends dictating the creation of trail machines capable of crushing apocalyptic lines only to turn around and dance up root latticed climbs, the industry is demanding versatility, and the SID RL Solo Air 120 answers to that admirably. With 120mm of travel on a design pared down to eliminate every ounce of excess weight, you get XC responsiveness paired with four and a half inches of bump devouring plushness in a design that challenges the definitions of cross country. New for this year, RockShox revisited the chassis design for the SID RL, keeping its focus squarely on XC efficiency and reworking the shape of the fork to add stiffness and eliminate excess material and weight wherever possible, with this version offering the increased rigidity and responsiveness of Boost spacing. Magnesium lowers and straight wall aluminum stanchions offer a blend of lightness and durability, while Rock Shox's factory tuned Motion Control DNA damper works to smooth out your ride quality when you steer your featherweight frame into rock gardens that the rest of your XC ride crew shies away from. RockShox made room to integrate its Dig Valve and Rapid Recovery into this version of the SID RL as well, both of which work to keep the fork performing consistently during high and low compression and recovering faster between consecutive hits for control and grip on the trail. When you decide to veer off buttery singletrack and head into uncharted territory, you can adjust the SID RL's lightweight Solo Air spring to adapt it to more rugged terrain, and it's built to be filled via an easy to use Schrader valve that keeps each air spring chamber correctly balanced relative to the ...