The RockShox SID Select+ suspension fork is designed for performance-oriented cross-country riders who demand reliability and precision. However, like all high-performance components, the SID Select+ can experience issues stemming from setup errors, wear and tear, or environmental factors. This guide provides a comprehensive breakdown of common problems with SID Select+ forks and how to troubleshoot them efficiently.
Tools Required:
- Suspension pump
- 2.5mm, 4mm, and 5mm hex wrenches
- Torque wrench [paid link] with Nm calibration
- Shock oil (as specified by RockShox)
- Suspension grease (Parker O-Lube or Slickoleum)
- Clean rags and isopropyl alcohol
- Replacement seals (if necessary)
Understanding the SID Select+ Platform
The SID Select+ is part of RockShox’s premium XC line, offering a Charger RL damper and DebonAir air spring. While this configuration provides excellent performance, it also demands precise tuning and maintenance. Any deviation from the recommended settings or wear of internal components can lead to noticeable performance degradation.
Air Spring-Related Issues
Inconsistent Fork Travel or Stiction
One of the most frequently reported problems with the SID Select+ fork is inconsistent travel or “stiction,” where the fork feels sticky at the start of compression.
This issue often results from dry or contaminated air spring seals. Riders may also feel that the fork isn’t using full travel despite correct sag setup.
To fix this:
- Clean and re-lubricate the air spring seals.
- Inspect the lower leg assembly and replace worn or cracked wiper seals.
- Add a small amount of RockShox-approved grease inside the air spring assembly.
- Check for proper negative air chamber equalization during inflation by cycling the fork after initial pressurization.
Loss of Air Pressure
Loss of air pressure over time is not uncommon and usually points to worn or damaged O-rings.
Steps to troubleshoot:
- Check for leaks using a soap and water solution at the Schrader valve and air can seams.
- If leaks are confirmed, replace the valve core and inspect internal air spring O-rings.
- Ensure the valve core is properly torqued to avoid micro-leaks.
Damper Issues
Inadequate Rebound or Compression Damping
If the fork is too fast in rebound or too soft during compression, it likely stems from damper oil contamination or incorrect settings.
- Recheck rebound and compression adjuster settings.
- Service the Charger RL damper by replacing the damper oil at the specified intervals (typically every 50 hours).
- Inspect for air bubbles in the damper oil; a full bleed may be required if the damping feels inconsistent or noisy.
Knob Rotation Feels Notchy or Loose
When the compression or rebound knobs don’t turn smoothly, internal debris or bent detent springs may be the cause.
- Remove the knob assembly and clean the detent mechanism.
- Inspect for bent or damaged springs or detent balls and replace them as needed.
Unusual Noises During Operation
Clicking or Clunking Sounds
Unusual noises when compressing the fork often indicate an issue with the CSU (crown-steerer-upper) interface or loose internal components.
Steps to diagnose:
- Ensure the top cap and damper side bolts are torqued to specification.
- Check headset bearings and preload adjustment; a loose headset can mimic suspension noise.
- Inspect CSU for creaks by placing the wheel against a wall and pushing forward while holding the brake—listen for sounds from the steerer tube junction.
Compatibility and Tuning Considerations
Sid Select+ and Remote Lockout Systems
The SID Select+ is compatible with remote lockout levers, but improper cable tension or routing can render the lockout ineffective.
- Check that the remote cable is taut and without excessive bends.
- Ensure the lever returns to the fully open and fully locked positions with minimal resistance.
- Replace frayed cables or contaminated housings.
Token Configuration for Rider Weight and Style
The SID Select+ uses volume tokens to adjust air spring progression. Incorrect token configuration can cause bottom-out issues or excessive harshness.
- Refer to RockShox’s token chart for recommended configurations by rider weight.
- Install or remove tokens using a cassette tool and torque wrench [paid link].
- Use anti-seize compound on threads when installing the top cap to avoid galling.
Seal Wear and Contamination
Frequent Oil Leakage
Oil leakage from the lower legs or crown area is commonly caused by worn seals or improperly installed dust wipers.
- Disassemble and inspect lower legs for oil pooling or visible residue.
- Replace wiper seals and foam rings if saturated or degraded.
- Ensure proper grease and oil application during reassembly to promote longevity.
Optimizing Performance After Troubleshooting
After addressing any mechanical issues, it’s essential to recheck all baseline settings:
- Sag should be adjusted to 20-25% for typical XC use.
- Rebound damping should be dialed in based on rider weight and terrain. Start with factory-recommended clicks and fine-tune incrementally.
- Compression damping must match the terrain. Lockout should remain firm without being completely rigid.
Regular maintenance every 50 hours of ride time and full servicing every 100-200 hours will prevent most issues from recurring.
Comparing SID Select+ to Other SID Models
While the SID Select+ shares structural DNA with the SID Ultimate, the primary difference lies in the damper. The Ultimate features the Charger Race Day damper, which is lighter and slightly more tunable but requires more frequent servicing. For most riders, the Select+ strikes a balance between performance and durability.
In comparison to the SID Select (non-plus), the Select+ benefits from improved materials and upgraded internals, including the DebonAir spring for enhanced small bump compliance.
FAQs
How often should I service the SID Select+ fork?
Routine maintenance is recommended every 50 hours, with full service (including damper and air spring) every 100-200 hours depending on riding conditions.
Why does my fork lose pressure overnight?
This typically indicates a leak in the air spring system, possibly due to a damaged valve core or O-ring. Perform a leak test and service the air spring as needed.
Is the SID Select+ compatible with 110mm boost hubs?
Yes, the SID Select+ is designed for Boost spacing and supports 110mm front hubs with the appropriate thru-axle configuration.
Can I install more volume tokens to prevent bottoming out?
Yes, adding volume tokens increases air spring progression. Refer to RockShox guidelines for the maximum allowable tokens for your fork travel.
What oil should I use for the lower leg service?
Use RockShox 0W-30 suspension oil or the specified fluid in the service manual to ensure compatibility with the fork’s seals and internals.
Why is my lockout not functioning properly?
Check for cable slack, kinks, or contamination. If issues persist, inspect the damper internals for mechanical faults and perform a damper bleed if necessary.