The RockShox Super Deluxe Ultimate RC2T rear shock is a high-performance suspension component designed for mountain bikers who demand top-tier performance and reliability. Servicing your rear shock is essential to maintaining its peak performance and longevity. While many riders opt to take their shocks to a professional mechanic, it is entirely possible to service your Super Deluxe Ultimate RC2T yourself with the right tools and knowledge. This guide will walk you through the steps to perform a full service, including installation, adjustment, and troubleshooting of common issues.

Tools Required

• 3mm, 4mm, 5mm, and 6mm Allen wrenches [paid link]
• Torque wrench [paid link]
• Shock pump (preferably digital for precise pressure)
• Clean rags
• T25 Torx wrench [paid link]
• Suspension fluid (specific to RockShox)
• RockShox air can service kit (includes o-rings and seals)
• Small plastic syringe (for oil filling)
• 8mm wrench
• 10mm socket or wrench
• Bottom bracket tool [paid link] (if applicable for certain disassembly tasks)
• Teflon tape (optional, for reassembly)
• Bicycle stand (optional, but helpful)

Disassembly of the Shock

Before you start the servicing process, it’s crucial to remove the shock from your bike and ensure that it’s in a clean, well-lit area. Follow these steps to safely disassemble the Super Deluxe Ultimate RC2T:

1. Remove the Shock from the Bike:
   • Place the bike on a stand if available.
   • Use the appropriate size Allen wrenches [paid link] to remove the bolts securing the shock to the frame. Typically, these are located at both ends of the shock (eyelet and shock body).
   • Take care not to damage any internal components or the frame when removing the shock.
2. Remove the Air Can:
   • Once the shock is off the bike, place it on a clean, flat surface.
   • Use the T25 Torx wrench [paid link] to remove the air can bolts.
   • Slowly and carefully slide off the air can to expose the inner components of the shock.
   • Place the air can in a safe place where it won’t get scratched or damaged.
3. Release Air Pressure:
   • Use your shock pump to release all air pressure in the shock. This will make disassembly easier and safer.

Cleaning the Shock

A critical part of the service process is ensuring that all parts are clean before reassembly. Dirt and debris can cause significant damage to the shock if not properly cleaned.

1. Clean the Outer Surface:
   • Use a clean rag to wipe down the entire shock, focusing on the body and any exposed moving parts.
   • Take extra care around the shock’s seals to avoid damaging them during cleaning.
2. Clean the Air Can:
   • Use a rag to wipe down the inside of the air can, ensuring it’s free from dirt or old suspension fluid.
   • Be mindful of the internal o-rings and seals; avoid using abrasive materials that could cause damage.

Inspection and Maintenance

After cleaning the shock, it’s time to inspect the internal components for wear and tear. Here’s how to perform the maintenance checks:

1. Inspect the Seals and O-Rings:
   • Carefully examine the seals and o-rings on both the shock body and air can. Over time, these components can wear out and lead to air leakage or poor suspension performance.
   • If the seals are cracked or worn, it’s essential to replace them using the RockShox air can service kit.
2. Check the Shock Shaft:
   • Gently compress the shock to check the shaft for any damage or signs of excessive wear.
   • The shaft should slide smoothly and freely. If you feel resistance or notice any scratching, it may be time to replace the shock or send it in for professional servicing.
3. Check the Damper for Leaks:
   • Inspect the damper for any signs of oil leakage or unusual wear. Leaking oil can lead to reduced performance and must be addressed by replacing the damper oil or seals.

Reassembly and Reinstallation

Once the shock has been cleaned and inspected, it’s time to reassemble it and get it ready for installation on your bike. Follow these steps:

1. Rebuild the Shock:
   • Begin by lubricating the seals and o-rings with a small amount of suspension fluid to ensure they slide smoothly during reassembly.
   • Insert the new or inspected seals and o-rings in their respective grooves in the shock body and air can.
   • Carefully slide the air can back onto the shock body, making sure the seals don’t get pinched.
   • Tighten the air can bolts securely with the T25 wrench, ensuring you don’t overtighten them.
2. Fill the Shock with Oil:
   • Use a small plastic syringe to fill the shock’s damper with the appropriate suspension oil, as specified by RockShox.
   • Follow the oil level guidelines for your specific model to ensure optimal performance.
3. Add Air Pressure:
   • Use a shock pump to add the correct air pressure to the shock, based on your body weight and riding style. This will vary depending on your needs but should generally fall within the recommended range specified by RockShox.
   • Double-check the pressure after a few compressions to ensure it holds steady.
4. Reinstall the Shock on the Bike:
   • Place the shock back onto the bike frame, ensuring that it is aligned correctly with the mounting points.
   • Tighten the bolts at both ends of the shock using the appropriate size Allen wrenches. Be sure not to overtighten, as this can cause damage to the frame or shock.
   • Use a torque wrench [paid link] to tighten the bolts to the manufacturer’s recommended torque setting.

Adjustment and Optimization

After successfully reinstalling your shock, you may need to make fine-tuned adjustments for optimal performance.

1. Set the Sag:
   • Sag is the amount the shock compresses under your body weight. Use the shock pump to adjust the air pressure until the sag falls within the recommended range (usually 25-30% of the shock’s total travel).
   • Check the sag by sitting on the bike and measuring the shock’s compression. Adjust as necessary.
2. Rebound Adjustment:
   • The rebound adjustment controls the speed at which the shock returns after compression. To set the rebound, turn the adjustment knob clockwise for a slower rebound and counterclockwise for a faster return.
   • Start with the rebound set to the middle of its range and adjust based on your riding preferences.
3. Compression Adjustment:
   • The Super Deluxe Ultimate RC2T also features external compression damping. This controls how much the shock resists compression. Adjust the high-speed and low-speed compression settings depending on your terrain.
   • For smoother trails, try reducing compression, while for rougher terrain, increasing compression may offer better control.

Troubleshooting Common Issues

While the Super Deluxe Ultimate RC2T is a reliable shock, like any suspension component, it can experience issues over time. Here are some common problems and their solutions:

1. Shock Feels “Spongy” or Has No Rebound:
   • This can be caused by a lack of air pressure or worn-out seals. Recheck the air pressure and inspect the seals for wear. If necessary, replace the seals or o-rings.
2. Oil Leaks:
   • Leaks can occur from the damper or air can seals. Replacing the seals and ensuring the shock is reassembled correctly should fix this issue.
3. Shock Bottoms Out:
   • If the shock bottoms out too easily, it may not have enough air pressure, or the compression damping may be set too soft. Add air pressure and adjust the compression settings to improve performance.

Conclusion

Servicing your RockShox Super Deluxe Ultimate RC2T rear shock can seem like a daunting task, but with the proper tools and a little knowledge, you can easily perform maintenance on your own. Regular servicing will help maintain your shock’s performance, extend its lifespan, and ensure a smoother ride on the trails. By following the steps outlined in this guide, you can keep your shock in top condition, saving both time and money while ensuring your bike performs at its best.