RockShox

SID Ultimate Race Day 3-Position Remote 29in Boost Fork

What Our Gearhead® Experts Are Saying:

"I mounted the SID Ultimate 3P on my race bike to save grams, but it surprised me with how capable it felt on rough terrain. The 35mm stanchions add confidence when pushing into corners or through rock sections. The 3P damper gives me everything I need without overcomplicating things."

The RockShox SID Ultimate 3P Fork brings an elite-level balance of lightweight performance and trail-worthy stiffness to the modern XC bike. The new 35mm chassis improves handling and tracking without adding bulk, offering increased confidence in off-camber sections and high-speed descents. Built for technical cross-country courses and backcountry exploration alike, the SID Ultimate delivers podium-worthy control.

At the heart of the system is the updated Charger Race Day 2 damper—the lightest RockShox has ever produced—offering Open, Pedal, and Lock settings for fast adaptation between trail types. Whether you're sprinting across a ridgeline or grinding up switchbacks, the 3-position remote lets you dial in efficiency or plushness on demand. The DebonAir+ spring smooths out small bumps while keeping plenty of support deeper in the stroke, ideal for stage racing or aggressive downcountry setups.

With a 120mm travel length, 44mm offset, and Boost hub spacing, the SID Ultimate 3P Fork integrates seamlessly into modern XC geometries. It’s built for racers and explorers who want the sharpest tool in their front end, without sacrificing ride feel or adjustability. Whether you’re chasing KOMs or podiums, the SID is always ready to lead from the front.