RockShox SID Ultimate 3P Crown D1 MTB Fork with Maxle Stealth & Fender Kit

Experience the pinnacle of cross-country mountain biking performance with the RockShox SID Ultimate Forks 3P Crown D1. Designed with precision and crafted from premium materials, these forks bring together an ultra-rigid 35mm chassis and the lightest performance damper ever created by RockShox. The SID Ultimate is engineered to deliver exceptional control, responsiveness, and efficiency on every trail, offering a perfect balance of lightweight design and robust durability.

Equipped with the innovative Race Day 2 3P damper, the SID Ultimate allows riders to seamlessly switch between three compression settings: Open for plush terrain absorption, Pedal for optimal power transfer, and a rock-solid Lockout for maximum efficiency on smooth surfaces. Enhanced by the DebonAir+ spring system, these forks provide heightened small-bump sensitivity and mid-stroke support, ensuring a smooth, controlled ride over varied terrain. The new bushing package reduces friction to the minimum, further refining the ride quality to make every trail feel effortless.

The fork’s sleek design is complemented by a meticulously machined crown for reduced weight and increased strength, available in striking Blue Crush and Gloss Black finishes with elegant Pearl White graphics. With included bolt-in torque cap adapters and a Maxle Stealth axle, installation and compatibility are made easier than ever. Designed not only for performance but also for versatility, the SID Ultimate is E-bike approved and compatible with a wide range of modern MTB setups, including BOOST™ 15x110mm axles and 29" wheels.

What It’s Good For

• Delivering a lightweight yet rigid chassis ideal for high-performance cross-country biking
• Providing superior small-bump sensitivity and mid-stroke support for a smooth and controlled ride
• Allowing precise adjustment with three compression settings (Open, Pedal, Lockout) for varied terrain and riding styles
• Reducing friction through an advanced bushing package for optimal smoothness and efficiency
• Enhancing durability and strength with a forged, hollow aluminum crown and magnesium lower legs
• Ensuring compatibility with modern MTB components and e-bikes for versatile use
• Offering quiet and consistent damping performance with Maxima Plush fluid

What It’s NOT Good For

• Not designed for downhill or heavy-duty freeride biking where extreme suspension travel and robustness are required
• Not suitable for wheel sizes other than 29", limiting compatibility with smaller-wheel mountain bikes
• Requires purchase of a remote lockout separately if remote operation is desired
• May not be ideal for riders seeking extremely plush or highly adjustable suspension beyond three compression positions
• Not compatible with suspension forks designed for non-BOOST or non-tapered steerer tubes

Frequently Asked Questions

What makes the SID Ultimate’s damper different from other models?
The SID Ultimate features the Race Day 2 3P damper, which is the lightest performance damper RockShox has ever made. It offers three distinct compression settings—Open, Pedal, and Lockout—allowing riders to adapt suspension firmness quickly based on terrain and riding style.

Is this fork compatible with e-bikes?
Yes, the SID Ultimate is E-bike approved, meaning it is built to withstand the additional stresses associated with e-bike use while maintaining excellent performance and durability.