MEROCA RCT-2 Adjustable Air Spring Coil Over Shock Absorber User Manual

1. Introduction

This manual provides essential information for the proper installation, adjustment, and maintenance of your MEROCA RCT-2 Adjustable Air Spring Coil Over Shock Absorber. Designed for mountain bikes, downhill bikes, and e-bikes, this shock absorber offers advanced tuning capabilities for various riding conditions. Please read this manual thoroughly before installation and use to ensure optimal performance and safety.

2. Safety Information

• Always wear appropriate safety gear when working on or riding your bicycle.
• Ensure all bolts and fasteners are tightened to the manufacturer's recommended torque specifications. Loose components can lead to serious injury.
• Do not attempt to disassemble the shock absorber beyond what is described in this manual. Internal components are under high pressure.
• Regularly inspect the shock absorber for any signs of damage, leaks, or wear. Replace damaged parts immediately.
• If you are unsure about any installation or adjustment procedure, consult a qualified bicycle mechanic.

3. Product Overview

The MEROCA RCT-2 shock absorber features a robust aluminum alloy body and a 550LBS/in coil spring. It offers four-way tuning dominance: Rebound, Compression, Preload, and Air Pressure adjustment, allowing for precise customization to your riding style and terrain.

Image: MEROCA RCT-2 Shock Absorber with key dimensions including 190-265mm eye-to-eye lengths, 56mm stanchion, 12mm mounting holes, and 9mm spring wire diameter.

Image: The MEROCA RCT-2 shock absorber is compatible with full-suspension mountain bikes, downhill MTBs, e-motorcycles, and e-MTBs, provided the eye-to-eye length and mounting width match.

4. Installation / Setup

The MEROCA RCT-2 shock absorber is designed for straightforward installation. Ensure your bike's frame is compatible with the shock's eye-to-eye length and 12mm mounting holes.

4.1 Pre-Installation Check

• Verify the eye-to-eye length of the new shock matches your bike's requirements (available lengths: 190mm, 210mm, 230mm, 240mm, 250mm, 265mm).
• Confirm your bike's mounting points accommodate 12mm axle mounts.
• Gather necessary tools, including an appropriate torque wrench.

4.2 Installation Steps

1. Carefully remove your existing shock absorber, following your bicycle manufacturer's instructions.
2. Align the MEROCA RCT-2 shock absorber with the mounting points on your bike frame.
3. Insert the mounting bolts through the shock eyelets and frame.
4. Tighten the mounting bolts to your bicycle manufacturer's specified torque settings. Do not overtighten.
5. Ensure the shock absorber moves freely through its travel without any binding or interference.

5. Operating and Adjustments

The MEROCA RCT-2 offers comprehensive adjustability to fine-tune your suspension performance.

5.1 Air Pressure Adjustment (200-300 PSI)

The shock absorber features a Schrader valve for air pressure adjustment. Increasing air pressure hardens the suspension, while reducing it makes it softer. This allows for high-pressure adjustment to handle rugged terrain effectively.

Image: The blue knob on the MEROCA RCT-2 shock absorber indicates the air pressure adjustment point. Increased air pressure hardens the suspension, while reduced air pressure softens it.

5.2 Rebound Adjustment

The rebound knob controls the speed at which the shock absorber extends after compression. Rotating the knob clockwise increases damping (slower rebound), while rotating it counter-clockwise reduces damping (faster rebound). This adjustment can be made in multiple stages.

Image: The red knob at the bottom of the MEROCA RCT-2 shock absorber is used for rebound adjustment. Clockwise rotation increases damping (slow), and counter-clockwise rotation reduces damping (fast).

5.3 Compression Preload Adjustment

The spring's top threaded collar allows for compression preload adjustment. Rotating the collar clockwise stiffens the suspension by compressing the spring, while rotating it counter-clockwise softens the suspension. This helps absorb impact forces and ensures a smoother ride.

Image: The threaded collar at the top of the MEROCA RCT-2 shock absorber is used to adjust compression preload. Turning it clockwise stiffens the spring, and counter-clockwise softens it.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your MEROCA RCT-2 shock absorber.

• Cleaning: After each ride, especially in muddy or wet conditions, clean the shock absorber with mild soap and water. Rinse thoroughly and dry with a soft cloth. Avoid high-pressure washers directly on seals.
• Inspection: Periodically check for any signs of oil leaks around the seals, scratches on the stanchion, or damage to the coil spring.
• Lubrication: Apply a small amount of suspension-specific lubricant to the stanchion and seals to keep them supple and reduce friction.
• Air Pressure Check: Check the air pressure regularly, especially before long rides, to ensure it is within your desired range (200-300 PSI).
• Bolt Torque: Re-check the torque of the mounting bolts periodically to ensure they remain secure.

7. Troubleshooting

If you encounter issues with your MEROCA RCT-2 shock absorber, refer to the following common troubleshooting tips:

• Loss of Air Pressure: Check the Schrader valve for proper sealing. If pressure loss persists, inspect for seal damage or consult a professional.
• Excessive Sag: Increase air pressure or adjust spring preload. Ensure the spring rate is appropriate for your weight and riding style.
• Harsh Ride: Reduce air pressure, soften spring preload, or adjust rebound damping to a faster setting.
• Bottoming Out: Increase air pressure, stiffen spring preload, or ensure the shock's travel is sufficient for your riding.
• Slow Rebound: Adjust the rebound knob to a faster setting (counter-clockwise).
• Fast Rebound (Pogo Stick Effect): Adjust the rebound knob to a slower setting (clockwise).

For issues not covered here, please contact MEROCA support.

8. Specifications

9. Warranty and Support

For specific warranty information, please refer to the product packaging or contact your retailer. For technical assistance, bike-specific fit confirmation, or any other support inquiries, please contact MEROCA customer service.

MEROCA Support: Please refer to the contact information provided with your purchase or on the official MEROCA website.