RockShox

SID SL Ultimate Race Day 29in Boost Fork

What Our Gearhead® Experts Are Saying:

"This fork nails the sweet spot for modern XC. It’s impressively light and stiff, and the two-position remote damper keeps things fast and controlled on any terrain. I love it on long races when I’m constantly shifting between smooth climbs and chunky descents—it’s intuitive, responsive, and race-ready."

Every second counts when we’re chasing finish lines, and the RockShox SID SL Ultimate 2 Position gives us the precision and performance to ride faster with less effort. Designed for serious XC racers, this featherweight fork delivers smooth travel and snappy responsiveness in a package that’s fine-tuned for podium pursuits. Whether we're attacking climbs or sprinting descents, the 2-position damper with remote capability lets us lock or open the fork with minimal hand movement and maximum efficiency.

With 100mm or 110mm of travel, the SID SL Ultimate 2 Position balances minimal weight with just enough cushion to stay planted in high-speed corners and technical stretches. The updated DebonAir+ spring offers plush small-bump feel without compromising mid-stroke support, while increased bushing overlap ensures long-term tracking and control. The forged aluminum crown and magnesium lowers are built to take the hits, while the Fast Black 32mm stanchions keep everything running friction-free. It’s ready to race—just add remote and go.