The RockShox SID Select+ is a high-performance suspension fork designed for competitive cross-country riders. Known for its lightweight chassis and Charger RL damper, this fork provides consistent performance over a variety of terrain. Proper installation, regular maintenance, and precise adjustment are critical to ensure longevity and optimal performance. This guide provides a comprehensive walkthrough tailored specifically to the SID Select+, covering everything from setup to troubleshooting and customization.

Tools Required

• Torque wrench [paid link] with appropriate bits
• Shock pump (for air pressure adjustments)
• Allen keys [paid link] (2mm to 6mm)
• Suspension grease and RockShox Dynamic Seal Grease
• Clean rags and isopropyl alcohol
• Pick tool for seal removal
• Plastic syringe or RockShox lower leg service kit
• Replacement seals and foam rings (specific to SID Select+)

Installation Guidelines for the RockShox SID Select+

Installing the SID Select+ requires attention to detail to avoid damaging internal components. Begin by ensuring the steerer tube is cut to the correct length and the star nut is installed. The crown race must be compatible with your headset.

Mount the fork into the head tube, tightening the stem bolts to manufacturer-recommended torque. Confirm that the front axle is compatible with the 15x110mm Boost standard used by the SID Select+. Align the disc brake caliper with the 2-bolt post-mount system, adjusting rotor placement carefully to prevent pad rub. Finally, connect the remote lockout if applicable, ensuring cable tension allows full actuation without binding.

Adjusting Air Pressure and Sag

For optimal performance, the SID Select+ relies on an air spring setup. Use a shock pump to set the recommended pressure based on rider weight. RockShox provides a baseline chart, but individual preferences may require fine-tuning.

Achieving 20–25% sag is essential for cross-country performance. Use a zip tie or rubber o-ring to measure sag while seated in a natural riding position. Adjust pressure incrementally and recheck until the ideal sag percentage is achieved.

Rebound and Compression Tuning

The Charger RL damper includes external rebound adjustment and an optional remote lockout. Rebound is adjusted via the red dial on the bottom of the right fork leg. Turn clockwise for slower rebound and counterclockwise for faster response.

Remote lockout, if installed, should provide firm compression damping without completely rigid behavior. Ensure the cable is tensioned such that full open and lock positions are distinctly felt. The lockout should never inhibit rebound motion or create a harsh top-out.

Performing Regular Maintenance

Maintenance of the SID Select+ should occur every 50 hours for lower leg service and every 200 hours for full damper and air spring overhaul.

For lower leg service:

• Remove the lower legs by loosening the bolts on the bottom of each leg and gently tapping them to unseat the internals.
• Drain old oil and clean the lower legs using isopropyl alcohol.
• Replace foam rings and seals, applying a thin coat of RockShox Dynamic Seal Grease.
• Reinstall the lowers and inject the appropriate amount of suspension oil (10W-30) into each leg using a syringe.

For damper and air spring service:

• Disassemble each unit separately and inspect for wear.
• Clean internal components and replace worn seals and o-rings.
• Lubricate and reassemble with attention to torque specifications.

Troubleshooting Setup Issues

Several common issues can affect SID Select+ performance:

Harsh Ride: Usually due to excessive air pressure or under-lubricated seals. Check sag and re-lubricate lower leg seals.

Noisy Operation: A squelching or slurping sound often indicates air mixed with oil in the damper. Perform a damper bleed and ensure correct oil volume.

Lockout Failure: If the remote lockout does not engage properly, inspect cable routing, lever travel, and damper seal condition.

Oil Leaks: Look for excessive oil on stanchions or dust seals. Replace seals and check for bushing wear if oil leaks persist.

Customization for Enhanced Performance

The SID Select+ supports several customizations to suit rider preferences and terrain:

Volume Spacers: Reduce air volume to create a more progressive spring curve. Ideal for aggressive riders who need more ramp-up.

Upgraded Remote Lockouts: Aftermarket lockout levers may provide smoother operation or ergonomic improvements.

Oil Weight Tuning: Heavier oil in the damper can slow down rebound and increase compression damping. This is useful for heavier riders or rough terrain.

Comparing SID Select+ to Similar Forks

Compared to the SID Ultimate, the Select+ shares the same chassis but uses the Charger RL damper instead of the Charger Race Day. The Ultimate is lighter and offers finer compression adjustment, but the Select+ provides excellent value for most riders.

Against the Fox 32 Step-Cast Performance, the SID Select+ is typically lighter with more tunable air spring volume, but the Fox may offer better small bump sensitivity due to its GRIP damper.

Compatibility with Other Drivetrain Components

The SID Select+ integrates best with Boost-standard front hubs (15x110mm) and 29” wheels. It uses a 44mm offset and is compatible with flat-mount and post-mount disc brakes. The fork’s cable routing accommodates SRAM and Shimano remote lockouts.

For drivetrains, the fork’s clearance allows use with 1x and 2x chainring setups, although 1x is preferred for optimal chainline and simplicity in modern XC bikes.

Conclusion

The RockShox SID Select+ is a race-ready fork that rewards proper setup and meticulous maintenance. By understanding its specific installation steps, maintenance intervals, and tuning options, riders can unlock its full potential. Whether racing or exploring technical trails, the SID Select+ delivers precision, efficiency, and reliability with the right care.