The RockShox Deluxe Ultimate RCT rear shock is designed for riders who want a versatile and highly tunable suspension. Whether you’re looking to optimize the performance of your mountain bike or dial in comfort for a specific trail, this shock offers a broad range of adjustability. In this guide, we will walk you through the installation, maintenance, troubleshooting, customization, and optimization of the Deluxe Ultimate RCT, ensuring you get the most out of this high-performance rear shock.

Installation of the Deluxe Ultimate RCT

Proper installation is critical to ensuring the best performance from your Deluxe Ultimate RCT rear shock. The installation process is straightforward, but it’s important to follow each step carefully.

1. Remove the Existing Shock: Start by removing the old shock from the bike frame. Use the appropriate tools to unbolt the shock mounts on both ends. Ensure that the bike is securely supported, and the rear wheel is free of any obstructions.
2. Check Frame Compatibility: Before installing the Deluxe Ultimate RCT, make sure it is the correct size for your bike’s frame. The shock should fit snugly without any gaps or strain on the mounting hardware. Double-check the eyelet sizes and shock stroke to avoid compatibility issues.
3. Install the New Shock: Align the shock’s eyelets with the frame’s mounts. Install the top and bottom hardware, ensuring that they are tightened to the manufacturer’s specified torque settings. Ensure that the shock is seated properly to avoid any misalignment that could affect performance.
4. Recheck the Mounting Bolts: After installation, check all bolts to ensure they are secure. A loose shock can lead to performance issues and potentially cause damage to your bike.

Adjustment of the Deluxe Ultimate RCT

One of the key features of the Deluxe Ultimate RCT is its comprehensive adjustability. The rear shock offers control over compression, rebound, and air spring pressures. Properly adjusting these settings will help you achieve optimal performance based on your riding style and conditions.

Air Pressure

1. Set the Correct Air Pressure: Use a shock pump to adjust the air pressure according to your weight and riding preferences. A good rule of thumb is to set the pressure so that the shock achieves approximately 25-30% of its total stroke as sag. For example, if the shock has a 50mm stroke, aim for 12-15mm of sag.
2. Fine-Tune the Pressure: Test ride your bike to check if the sag is correct. If the shock feels too stiff or too soft, make small adjustments to the air pressure. For heavier riders, increasing air pressure will make the shock firmer, while lighter riders will need less air pressure for a more plush ride.

Compression Settings

1. Adjust the Low-Speed Compression: The Deluxe Ultimate RCT features a low-speed compression adjuster. Turning this knob clockwise will increase compression, making the shock more resistant to slow movements (like when pedaling). This adjustment is ideal for reducing pedal bob on smoother trails or increasing support on technical climbs.
2. Fine-Tune for Ride Comfort: If you find that the bike feels too stiff, reduce the low-speed compression slightly. For rough terrain or aggressive riding, increasing compression can improve control and prevent bottoming out.

Rebound Settings

1. Set the Rebound Damping: Rebound control is crucial for controlling the shock’s recovery after compression. To adjust the rebound, use the rebound knob on the Deluxe Ultimate RCT. Turning it clockwise will slow down the rebound, while counterclockwise will speed it up.
2. Find the Sweet Spot: The goal is to have the shock return to its normal position without bouncing excessively or feeling sluggish. Adjust the rebound based on your riding style and terrain type. A slower rebound is beneficial for aggressive riders or rough terrain, while faster rebound suits smoother trails.

Maintenance of the Deluxe Ultimate RCT

Maintaining the Deluxe Ultimate RCT rear shock is essential for long-term performance. Regular maintenance can help extend the lifespan of the shock and ensure it performs optimally.

Cleaning the Shock

1. Wipe Down After Every Ride: After each ride, use a clean cloth to wipe off dirt and debris from the shock. This helps prevent grime from accumulating on the shock body and seals, which can lead to wear.
2. Inspect the Seals: Check the shock’s seals regularly for any signs of wear or damage. Leaking air or oil from the seals can lead to performance loss. If you notice any issues, it may be time for a service.

Oil Changes

1. Service the Shock Regularly: Every 50-100 hours of riding, you should consider performing an oil change on the Deluxe Ultimate RCT. This involves removing the shock’s components, draining old oil, and replacing it with fresh suspension fluid. Regular oil changes keep the shock running smoothly and maintain consistent damping performance.
2. Check for Wear and Tear: While servicing, inspect the shock’s internal components for wear, such as the damper shaft, bushings, and piston. If any parts appear damaged, it is essential to replace them before they affect shock performance.

Bushing Maintenance

1. Lubricate the Bushings: The shock’s bushings should be lubricated periodically to ensure smooth movement. Use a suitable grease to coat the bushings, preventing friction and premature wear.
2. Inspect for Play: Check for any side-to-side play in the bushings, which could indicate damage. If any play is detected, it’s time to replace the bushings to avoid compromising performance.

Troubleshooting Common Setup Issues

Shock Bottoming Out

1. Cause: Bottoming out typically occurs if the air pressure is too low, or the rebound damping is too slow.
2. Solution: Increase the air pressure slightly to ensure the shock has enough support, and adjust the rebound to allow quicker recovery.

Excessive Bobbing or Pedal Damping

1. Cause: Excessive bobbing while pedaling is usually due to insufficient low-speed compression.
2. Solution: Turn the low-speed compression knob clockwise to increase resistance during pedal strokes, reducing bobbing on smoother terrain.

Loss of Rebound Control

1. Cause: If the shock feels like it’s not rebounding properly, it may be due to incorrect rebound settings or internal issues.
2. Solution: First, try adjusting the rebound speed to find the correct setting. If the issue persists, the shock may need servicing.

Customization and Optimization for Better Performance

To truly optimize the Deluxe Ultimate RCT for your riding style and preferences, consider these tuning tips:

• Tune for Your Riding Style: Aggressive riders may benefit from firmer compression and slower rebound settings to handle rough terrain, while casual riders might prefer a softer setup for comfort.
• Adjust for Terrain: On technical trails, increase the low-speed compression for added support, while on smoother trails, a softer setup with reduced compression can improve comfort.
• Fine-Tune Air Pressure: Adjusting air pressure slightly during different riding conditions can drastically change the shock’s behavior. Lower pressure works better for smooth rides, while higher pressure supports aggressive downhill riding.

Comparison with Similar Models

The Deluxe Ultimate RCT competes with other high-end shocks in the market, such as the Fox Float X2 and the RockShox Super Deluxe. While the Float X2 is known for its plush feel and high-end performance, the Deluxe Ultimate RCT stands out with its precision adjustability, particularly in terms of compression and rebound tuning. It offers a wider range of adjustability compared to the Super Deluxe, allowing riders to fine-tune their setup more precisely for varied conditions.

Compatibility with Other Drivetrain Components

The Deluxe Ultimate RCT is designed to be compatible with most modern mountain bike drivetrains, including Shimano, SRAM, and others. However, always ensure the shock’s stroke length and mounting hardware align with your frame. If you’re considering a full drivetrain upgrade, remember that shocks with adjustable damping, like the Deluxe Ultimate RCT, work best when paired with quality drivetrains that allow for precise tuning of suspension and pedaling forces.