The RockShox SID Select+ suspension fork is a high-performance component tailored for serious cross-country riders. Known for its weight-saving design and reliable damping features, it sits comfortably between the entry-level SID Select and the elite SID Ultimate. This article will analyze the SID Select+ in detail, covering its installation, tuning, maintenance, and performance compared to other suspension fork models, while also exploring compatibility and upgrade considerations for dedicated riders.
Tools Required
- Torque wrench [paid link]
- Allen key set (1.5mm–6mm)
- Crown race setting tool
- Shock pump
- Caliper for measuring rotor clearance
- Grease and suspension-specific lubricant
- Torque specification sheet (RockShox recommended)
Installation Guide for SID Select+
Installing the SID Select+ involves precise steps to ensure optimal fork alignment, safety, and durability. Begin by preparing the steerer tube; measure and cut it to the correct length for your frame, then install the star nut or threaded insert depending on your headset system. Use a crown race setter to fit the race snugly onto the fork crown.
Once the fork is ready, insert it into the head tube and install the headset spacers, stem, and top cap. Secure everything loosely until final torque adjustments. Use a torque wrench [paid link] to tighten the stem bolts according to RockShox specifications, typically between 4–6 Nm.
Mounting the front wheel involves aligning the axle precisely within the dropouts. The SID Select+ features a Maxle Stealth thru-axle system, which must be torqued correctly to ensure hub alignment. Finally, connect the brake caliper, checking for rotor clearance and centering before tightening bolts.
Adjustment and Tuning
The SID Select+ uses the DebonAir spring and Charger RL damper, offering user-friendly adjustments for different rider weights and terrain. Air pressure should be set based on the rider’s weight, using a shock pump and RockShox’s PSI chart as a starting point.
Rebound damping is controlled via a red dial at the bottom of the fork leg. This adjustment regulates how quickly the fork extends after compression. Start in the middle setting and fine-tune based on ride feel. The compression dial on top allows for lockout or open mode selection. While not as tunable as the Charger Race Day damper in the Ultimate model, it offers sufficient range for most riders.
Maintenance and Service Intervals
Regular maintenance extends the lifespan and ensures consistent performance. Lower leg service is recommended every 50 hours of riding. This involves removing the lower legs, cleaning out old lubricant, inspecting foam rings and seals, and reapplying suspension grease and fluid.
Full damper and air spring servicing should occur every 100–200 hours, depending on riding conditions. RockShox provides service manuals specific to the SID Select+, including torque values and fluid volumes. Always use genuine RockShox replacement parts to maintain factory performance standards.
Common Set-up Issues and Troubleshooting
Several issues may arise during or after installation. One common problem is inadequate negative air pressure, which can result in a harsh or non-compliant feel. Bleed excess pressure from the negative chamber using the equalizing dimple after pumping the main chamber.
Another issue involves brake rotor rub. This can be resolved by re-centering the caliper and ensuring the thru-axle is torqued properly. A misaligned crown race or incorrectly torqued stem can cause steering resistance, which should be addressed immediately for safety and performance.
Performance Customization and Optimization
Although the SID Select+ lacks the ultra-lightweight damper of the Ultimate model, performance can still be optimized. Riders can customize volume spacers in the air spring to adjust bottom-out resistance. Reducing volume increases progression, ideal for aggressive riding.
Aftermarket tuning options such as damper revalving or upgrading to a Charger 2.1 or Race Day damper are feasible but should be approached carefully to ensure compatibility. Installing a friction-reducing upgrade kit or stanchion lube can improve small-bump compliance and reduce wear.
Compatibility with Other Drivetrain and Frame Components
The SID Select+ is designed for 29-inch wheels and typically fits frames with 44mm offset standards. It supports Boost spacing (110mm axle width) and uses a tapered steerer tube, making it compatible with most modern XC and trail frames.
Brake mount compatibility is post-mount, generally supporting 160mm to 180mm rotors without adapters. Ensure headset bearing angles and crown race dimensions match your frame to avoid interface problems. The Maxle Stealth system requires a compatible dropout standard, generally present on current mountain bike frames.
Comparing SID Select+ with Other Models
The SID Select+ is often compared with models such as the Fox 34 Step-Cast Performance Elite and the RockShox SID Ultimate. Here’s how it stacks up:
- Versus SID Ultimate: The Ultimate includes a lighter Race Day damper, Ti bolts, and an upgraded finish, offering marginal gains in weight and feel. However, the Select+ offers 90–95% of the performance at a lower price point.
- Versus Fox 34 Step-Cast Performance Elite: The Fox fork is slightly stiffer due to its 34mm chassis but also heavier. Its GRIP2 damper offers more tuning range, yet the SID Select+ feels more responsive for XC-specific setups.
- Versus RockShox Reba RL: The Reba is heavier and lacks the latest air spring and damper tech. SID Select+ provides significantly better sensitivity, adjustability, and stiffness.
Choosing the Best Option for Your Riding Style
For competitive cross-country riders or weight-conscious trail users, the SID Select+ offers a balanced mix of weight savings, adjustability, and cost-efficiency. If elite-level responsiveness and gram-counting are crucial, the SID Ultimate may justify the premium. Riders needing more aggressive damping or chassis stiffness may prefer a Fox 34 or Pike, depending on terrain.
For general use, the SID Select+ delivers strong performance, straightforward serviceability, and a competitive price, making it a standout in its class.
FAQs
Is the RockShox SID Select+ suitable for aggressive trail riding?
No, it is designed for XC and light trail use. For more aggressive terrain, consider the Pike or Lyrik series.
Can I upgrade the SID Select+ damper?
Yes, upgrading to a Charger 2.1 or Race Day damper is possible with compatible parts and proper installation.
What tire size fits the SID Select+?
It supports 29-inch wheels with tire widths up to 2.4″, depending on rim and frame clearance.
How does the SID Select+ compare in weight to other forks?
At approximately 1,560 grams, it is lighter than the Fox 34 but slightly heavier than the SID Ultimate.
Does the SID Select+ have lockout?
Yes, it features a remote or crown-adjustable lockout depending on the variant.
What is the service interval for the SID Select+?
Lower leg service is recommended every 50 hours, with full servicing at 100–200 hours based on riding conditions.