The RockShox SID Select+ suspension fork stands as a cornerstone in the cross-country (XC) segment, offering riders a blend of cutting-edge performance and race-ready responsiveness. Designed for aggressive XC racing and technical trail exploration, the SID Select+ focuses on a balance of weight savings, damping control, and stiffness. This detailed review covers every aspect of the SID Select+, including installation, adjustment, maintenance, troubleshooting, compatibility, and customization.
Technical Overview and Design Features
The SID Select+ is based on RockShox’s updated SID chassis, sharing several features with its higher-end sibling, the SID Ultimate. It utilizes a 35mm stanchion tube design for increased torsional rigidity while maintaining a lightweight structure. The DebonAir air spring provides a plush feel off the top, and the Charger RL damper ensures consistent control through varied terrain. With travel options between 100mm and 120mm, this fork is tailored for XC riders who demand precision and efficiency.
Tools Required
- 6mm and 8mm Allen keys [paid link]
- Torque wrench [paid link]
- Suspension pump
- Flathead screwdriver
- Isopropyl alcohol and clean cloth
- Lower leg removal tool (optional)
- 27mm socket or RockShox top cap tool
Installation Process
Proper installation of the SID Select+ is essential for optimal performance. Start by measuring and cutting the steerer tube to the appropriate length. Install the star nut using a suitable setting tool. When fitting the fork to the frame, torque the headset spacers and stem bolts according to manufacturer specifications, typically between 5–6 Nm.
Before installing the front wheel, check that the brake caliper aligns correctly with the post-mount design of the fork. Use a torque wrench [paid link] to fasten the thru-axle to the specified 9–12 Nm, ensuring proper interface with the hub.
Adjustment Settings
The SID Select+ is designed with rider customization in mind. The DebonAir spring can be fine-tuned using volume spacers to change the progression curve. The air pressure should be set based on rider weight, with the recommended pressure chart located on the fork’s lower leg. A suspension pump allows precise control of sag, generally set at 20–25% for XC riding.
The Charger RL damper includes a low-speed compression dial and a two-position lockout switch. Riders can quickly toggle between open and lockout modes for climbing and descending transitions. Rebound adjustment, located at the fork’s base, should be set to ensure the fork returns quickly without bouncing.
Routine Maintenance and Service Intervals
Regular maintenance of the SID Select+ enhances both performance and longevity. Lower leg service is recommended every 50 hours of riding, including replacing foam rings and wiper seals, and refreshing the oil. Full damper and air spring service should occur every 100–200 hours, depending on riding conditions.
Cleaning the fork after muddy or dusty rides with isopropyl alcohol and a clean rag prevents contamination. Avoid pressure washing, especially near seals and bushings.
Common Set-Up Issues and Troubleshooting
Fork Not Rebounding Properly: This often stems from incorrect air pressure or rebound settings. Recheck the air pressure using a calibrated suspension pump and adjust rebound in small increments.
Harsh or Sticky Movement: May indicate insufficient lubrication or contaminated seals. Perform a lower leg service and ensure foam rings are properly oiled.
Lockout Not Engaging: If the lockout switch feels loose or ineffective, check the damper fluid level and ensure no air is trapped in the hydraulic circuit.
Travel Reduction Concerns: Ensure the air shaft installed matches your desired travel. The SID Select+ allows for internal travel adjustment via air shaft replacement.
Customization and Performance Tuning
Riders can enhance the SID Select+ by installing Bottomless Tokens to alter air volume and increase progression for aggressive riding. Changing oil viscosity in the damper can also fine-tune compression response.
For lightweight racing builds, consider replacing the stock thru-axle with a lighter titanium model. To reduce stiction, many riders apply a fork-specific lubricant or opt for low-friction aftermarket wiper seals.
Durability and Real-World Testing
In extended field use, the SID Select+ demonstrates high reliability and resistance to wear under diverse conditions. The Charger RL damper maintains damping consistency over long descents, and the stanchion coating minimizes scratching and oil contamination.
Carbon crown interfaces remain solid under torque, and the stanchions show minimal flex even under heavy braking. Longevity is contingent on regular maintenance and proper setup, particularly ensuring the fork operates within its designed sag and pressure parameters.
Compatibility with Drivetrain and Wheel Standards
The SID Select+ supports Boost spacing (110mm) and is compatible with 29” wheels, although specific configurations may accommodate 27.5” wheels. Brake mount standard is Post Mount 160, and it accepts up to 203mm rotors with appropriate adapters.
The fork does not interfere with drivetrain components, but front derailleur compatibility may be influenced by overall fork offset and frame clearance. It pairs well with RockShox remote lockout systems and SRAM drivetrains for seamless cockpit integration.
Comparison with Other RockShox Models
Compared to the SID Ultimate, the Select+ offers a more affordable package with the same DebonAir air spring but a simplified Charger RL damper versus the Ultimate’s Charger Race Day damper. This makes the Select+ a better option for riders prioritizing reliability over marginal weight savings.
When placed against the Reba RL, the SID Select+ provides superior stiffness, more refined damping control, and a lower overall weight. While the Reba is suited for recreational XC riders, the SID Select+ targets competitive athletes needing race-level performance.
Rider Suitability and Use Case
The RockShox SID Select+ is ideal for competitive XC racers, endurance riders, and those seeking an upgrade from entry-level forks. It provides a noticeable improvement in stiffness, damping quality, and responsiveness, without reaching the price point of flagship models.
Its ability to handle rough XC terrain, technical climbs, and fast descents makes it a top-tier choice in its class. Riders seeking a balance between performance and price will appreciate its capabilities.
Frequently Asked Questions (FAQs)
1. How much does the SID Select+ weigh?
The SID Select+ weighs approximately 1,678 grams (29” version with 120mm travel and Boost spacing).
2. Can I install a remote lockout on this fork?
Yes, the SID Select+ is compatible with RockShox OneLoc and TwistLoc remote lockout systems.
3. What is the maximum tire size it can accommodate?
It comfortably fits up to a 2.4” wide tire on 29” wheels, depending on the rim width and frame clearance.
4. Is the SID Select+ compatible with tapered head tubes?
Yes, it comes with a 1.5” to 1 1/8” tapered steerer tube, standard for most modern MTB frames.
5. How often should I service the fork?
A lower leg service is recommended every 50 hours, with a full damper and air spring service every 100–200 hours.
6. Can I reduce or increase the travel on this fork?
Yes, travel can be adjusted internally by changing the air shaft to 100mm or 120mm, depending on the existing configuration.
Conclusion
The RockShox SID Select+ delivers premium-level performance tailored for cross-country and marathon riders. With its combination of weight savings, stiffness, and customizable damping, it offers a compelling upgrade from mid-range forks. Regular maintenance and correct setup ensure the fork remains responsive and durable over thousands of trail kilometers. For riders seeking race-ready efficiency without the top-tier price, the SID Select+ is a standout choice.