Is the Deluxe Ultimate RCT the Best Rear Shock for Mountain Bikes?

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The RockShox Deluxe Ultimate RCT rear shock is a premium suspension component designed for mountain biking enthusiasts who demand precision, performance, and reliability. With its advanced features, this rear shock offers a customizable ride that suits a variety of terrains and riding styles. In this guide, we’ll explore everything you need to know about the Deluxe Ultimate RCT, including installation, maintenance, troubleshooting, optimization, and how it compares to other rear shock models.

Installation of the RockShox Deluxe Ultimate RCT Rear Shock

Installing the Deluxe Ultimate RCT is a straightforward process, but it requires attention to detail to ensure proper setup. Here’s a step-by-step guide for installation:

Step 1: Prepare the Tools

Before starting, ensure you have the following tools:

Step 2: Remove the Old Rear Shock

If you’re replacing an existing shock, follow these steps:

  1. Use a 5mm Allen wrench [paid link] to remove the bolts securing the old rear shock to the frame and the swingarm.
  2. Carefully slide the shock out of its mounting points, being cautious not to damage the frame or swingarm.

Step 3: Mount the Deluxe Ultimate RCT Rear Shock

  1. Place the new Deluxe Ultimate RCT rear shock into its mounting points on the bike frame and swingarm.
  2. Use a 10mm spanner to tighten the mounting bolts, ensuring the shock is securely fastened.
  3. Torque the bolts to the manufacturer’s recommended specifications to avoid over-tightening or under-tightening.

Step 4: Set the Sag and Air Pressure

  1. Use a shock pump to adjust the air pressure in the rear shock according to your weight and riding style. RockShox recommends starting with a pressure that gives you about 25-30% of the total travel as sag.
  2. Check the sag by sitting on the bike and verifying that the rear shock compresses to the correct amount of travel.
  3. Fine-tune the air pressure until the sag feels right.

Step 5: Test the Shock

Once the shock is installed, test the bike by compressing the rear suspension. Ensure the shock feels smooth and responsive, and adjust the air pressure if necessary.

Maintenance of the Deluxe Ultimate RCT Rear Shock

Proper maintenance is essential to keep the Deluxe Ultimate RCT rear shock performing at its best. Regular servicing will prevent wear and tear and extend the lifespan of your suspension. Below are the key maintenance tasks:

Routine Cleaning

  • After each ride, clean the shock with a soft cloth to remove dirt, debris, and moisture. Pay special attention to the shock body and the seals.
  • For best results, use a mild detergent and water solution. Avoid harsh chemicals that may damage the shock’s components.

Lubrication of the Shock’s Air Sleeve

  • Every 50 hours of riding or once per season (whichever comes first), remove the air sleeve from the shock.
  • Clean the air sleeve and lubricate the shaft with a suitable suspension grease. This helps reduce friction and ensures smooth performance.

Checking the Seals

  • Inspect the shock seals for any signs of damage or leaks. If the seals are worn or damaged, replace them immediately to prevent dirt and moisture from entering the shock.
  • Regularly check for any oil leaks around the shock body and pivot points.

Air Pressure Adjustments

  • Check the air pressure every few rides to ensure it remains within the optimal range for your weight and riding style.
  • Over time, air can escape, requiring periodic recharging of the shock using a shock pump.

Troubleshooting Common Setup Issues

Even with the best components, issues can arise during setup or use. Here are some common problems with the Deluxe Ultimate RCT and how to resolve them:

Issue 1: Lack of Rebound Control

If the shock doesn’t seem to rebound quickly enough or feels too stiff, the rebound damping may need adjustment. To resolve this:

  1. Use the rebound adjuster knob to fine-tune the rebound speed.
  2. Turn the knob counterclockwise for a slower rebound or clockwise for a faster rebound. Make small adjustments until the shock rebounds to your liking.

Issue 2: Bottoming Out

If the rear shock bottoms out too often, it may be due to insufficient air pressure or incorrect sag. To fix this:

  1. Check the air pressure and adjust it as needed. Increase the pressure slightly if the shock is bottoming out on rough terrain.
  2. Adjust the sag to ensure it’s set within the recommended range (25-30%).

Issue 3: No Compression Damping

If the shock feels too soft or fails to provide adequate support during rough riding, you may need to adjust the compression damping:

  1. Locate the compression adjuster on the shock and turn it clockwise to increase damping (firm up the ride) or counterclockwise to reduce damping (softer ride).
  2. Test the shock after each adjustment to find the right balance of support and comfort.

Customization and Optimization for Better Performance

One of the standout features of the Deluxe Ultimate RCT is its high level of customization, allowing riders to fine-tune the shock for optimal performance. Here are a few ways to optimize the shock:

Adjusting the Compression and Rebound

The Deluxe Ultimate RCT allows for independent adjustment of compression and rebound damping. This flexibility allows you to dial in the suspension to match your riding style, terrain, and personal preferences.

  • Compression Damping: Adjust the compression damping to control how the shock reacts to bumps and obstacles. For smoother terrain, a lower compression setting provides a more comfortable ride. For aggressive riding or technical trails, increase the compression to maintain control.
  • Rebound Damping: Proper rebound damping is crucial to prevent the shock from rebounding too quickly or too slowly. Fine-tune this setting to achieve a consistent, controlled ride.

Fine-Tuning the Air Pressure

The air pressure in the Deluxe Ultimate RCT shock is adjustable to accommodate different rider weights and riding styles. Increasing the air pressure will make the shock firmer, while reducing it will provide a plusher, more forgiving feel. Adjust the pressure based on your weight and the type of terrain you frequent.

Utilizing the DebonAir Spring

The Deluxe Ultimate RCT features the DebonAir spring, which is designed to improve small-bump sensitivity and enhance overall comfort. The spring can be adjusted for different riders by modifying the air volume. Riders seeking more support can use a lower volume air canister, while those looking for a more plush ride may want to go for a larger volume.

Comparison with Similar Models

While the Deluxe Ultimate RCT is an excellent choice for riders seeking top-tier performance, it’s essential to compare it with similar models to ensure it’s the best option for your needs.

RockShox Super Deluxe

The RockShox Super Deluxe is a more affordable alternative to the Deluxe Ultimate RCT. It offers a similar level of performance but lacks the high-end rebound and compression adjustments. The Super Deluxe is a great choice for riders who don’t need the extreme customization offered by the Deluxe Ultimate RCT.

Fox Float X2

The Fox Float X2 is a direct competitor to the Deluxe Ultimate RCT, offering a similar level of performance with even more extensive tuning options. However, it is often heavier and more expensive. Riders seeking the ultimate in suspension technology and tuning capabilities may prefer the Fox Float X2 over the Deluxe Ultimate RCT.

Cane Creek DB Inline

The Cane Creek DB Inline offers a unique design with a highly customizable shock. While it is comparable in terms of adjustability to the Deluxe Ultimate RCT, the Cane Creek model is often seen as more complex to set up and maintain. It is a good choice for riders who want ultimate fine-tuning but may not be ideal for beginners.

Compatibility with Other Drivetrain Components

The RockShox Deluxe Ultimate RCT is compatible with most modern mountain bike drivetrains, including Shimano, SRAM, and other high-performance systems. However, it’s essential to check the specifications of your bike frame and drivetrain before installing the shock. Ensure that the shock mount hardware is compatible with your frame’s mounting points and that the travel length matches your bike’s geometry.

The shock’s performance will also be influenced by the overall suspension design and drivetrain components. For instance, pairing the Deluxe Ultimate RCT with a high-end fork, such as the RockShox Pike or Fox 36, will provide a balanced and cohesive suspension setup.