The RockShox SID Select+ is a performance-focused cross-country suspension fork built to deliver precise control, efficient power transfer, and ultra-lightweight design. Engineered for competitive XC riders and endurance racers, this fork integrates advanced technologies like the Charger RL damper and DebonAir air spring to ensure superior responsiveness on variable terrain. This guide provides an in-depth look at the installation, adjustment, maintenance, troubleshooting, and customization of the RockShox SID Select+, along with compatibility insights and model comparisons.

Tools Required

• 6mm and 2.5mm Allen wrenches [paid link]
• Torque wrench [paid link] (Nm scale)
• Star nut installation tool
• Suspension pump
• Clean rags and isopropyl alcohol
• Crown race setting tool
• RockShox Maxima Plush fluid (recommended)
• Fork-specific seal kit
• Grease for seals and threads

Installation of the SID Select+

Proper installation of the SID Select+ ensures long-term performance and safety. The steerer tube should be cut precisely based on your frame and cockpit setup. Always install a star nut before mounting the fork to the frame. Torque specifications should be followed strictly, especially for the stem and crown race.

The fork uses a Boost hub spacing (110mm) and a 15x110mm Maxle Stealth axle. This compatibility must be confirmed with your front wheel and disc rotor setup. Additionally, ensure that the fork’s offset (44mm or 51mm depending on model) aligns with your frame geometry.

Suspension Setup and Adjustment

Setting up the SID Select+ begins with tuning the air spring. RockShox provides a pressure guide based on rider weight, but fine-tuning may be necessary. The DebonAir system offers a smooth initial stroke, which enhances small bump compliance. Riders should use a high-pressure suspension pump to adjust the positive and negative chambers simultaneously.

The Charger RL damper includes low-speed compression and rebound adjustments. These can be accessed on the top and bottom of the right leg. Rebound should be tuned for terrain type and rider preference, with slower rebound recommended for technical descents. Lockout functionality is integrated for climbing efficiency and can be remote-activated or manually toggled depending on the version.

Routine Maintenance Guidelines

To ensure optimal performance, the SID Select+ should undergo lower leg maintenance every 50 hours of ride time. This includes removing the lowers, cleaning old oil, and applying fresh Maxima Plush fluid. At 100-hour intervals, a full damper and air spring service is recommended. Replace wiper seals during major services to maintain airtight performance and prevent contamination.

Inspect the stanchions regularly for scratches or wear, as damage can degrade performance and seal integrity. Also check the Maxle for proper torque and wear on the axle threads.

Troubleshooting Common Issues

Some users report inconsistent lockout or diminished rebound control. This often stems from air in the damper or insufficient oil levels. Performing a full damper bleed can resolve these issues. If the fork feels too stiff initially, check the air pressure and volume spacers. Adding or removing volume tokens allows fine control of the spring curve for more linear or progressive feel.

Creaking at the crown-steerer interface typically indicates insufficient headset preload or contamination. Re-tighten the headset to manufacturer torque spec and apply carbon paste if necessary. Lastly, any oil seepage around the seals should prompt immediate inspection and service to avoid internal contamination.

Customization and Performance Optimization

Riders can tailor the SID Select+ by adjusting volume spacers, experimenting with damper tuning, and switching to a remote lockout system for on-the-fly suspension control. Volume tokens can be added to increase progression and reduce bottom-out on aggressive courses.

The SID Select+ also supports RockShox Torque Cap-compatible hub interfaces, which increase dropout-to-hub stiffness and enhance steering precision. For riders chasing grams, pairing the fork with a carbon steerer tube spacer and ultralight stem further reduces cockpit weight.

Compatibility with Other Drivetrain and Frame Components

The SID Select+ is compatible with all modern tapered head tubes (1.5” to 1-1/8”), flat-mount or post-mount disc brakes, and Boost-spacing frames. It works seamlessly with SRAM’s TwistLoc remote for lockout activation and integrates well with wireless cockpit setups, preserving the clean aesthetics of high-end XC bikes.

For drivetrain compatibility, ensure that the brake caliper mounts match your rotor size (typically 160mm or 180mm for XC). The fork’s axle type fits standard Boost hubs, and it is recommended to use torque caps for full performance benefits with SRAM hubs.

SID Select+ vs. Other RockShox Fork Models

Compared to the SID Ultimate, the Select+ offers nearly identical internals, including the Charger RL damper and DebonAir spring, but with minor weight savings traded off due to non-carbon components. The Select+ omits the machined crown and titanium hardware seen in the Ultimate but retains core performance features.

When compared to the SID Select, the Select+ distinguishes itself through upgraded damper oil, improved lockout feel, and better small-bump compliance due to its internal tuning. Riders looking for performance close to the Ultimate without the premium price often choose the Select+ as the ideal middle ground.

Conclusion

The RockShox SID Select+ suspension fork balances performance, adjustability, and value in a package tailored for competitive cross-country riders. With proper installation, regular servicing, and thoughtful customization, this fork delivers responsive handling and efficient pedaling support across varied terrain. Understanding its tuning options and compatibility ensures riders get the most from their suspension setup.