The Topaz 2.0 Limited Edition rear shock from DVO is a high-performance component designed for riders seeking improved control, comfort, and adjustability in their ride. This rear shock is part of DVO’s premium line, specifically tailored for those who demand the highest level of suspension performance. This article will guide you through the installation, adjustment, and maintenance of the Topaz 2.0, highlight troubleshooting tips, and provide insights on how to optimize this shock for superior performance.

Tools Required

• Torque wrench [paid link]
• 4mm, 5mm, and 6mm Allen wrenches [paid link]
• Shock pump
• Suspension fluid (DVO recommended)
• Clean rags
• Sealant grease
• Tire pressure gauge

Installation of the Topaz 2.0 Limited Edition Rear Shock

Installing the Topaz 2.0 Limited Edition rear shock is a relatively straightforward process, but it requires precise attention to detail to ensure that it functions optimally. Here is a step-by-step guide to ensure a correct and secure installation.

1. Remove the Old Shock: If replacing an existing shock, carefully remove it using the appropriate wrenches to detach both ends from the rear triangle and the frame. Make sure to record the shock size and specifications for reference.
2. Prepare the Topaz 2.0 Shock: Unbox the shock and inspect it for any visible damage. Ensure the air canister is set to the correct pressure before installation. Attach the shock to the frame carefully, ensuring the shock’s mounting hardware aligns with the frame’s eyelets.
3. Secure the Shock: Use the correct torque settings for both the upper and lower mounting bolts. Generally, these are between 8–10 Nm, but always double-check DVO’s recommendations.
4. Check Alignment: Ensure the shock sits properly in its mounts. It should move freely and smoothly without binding or excessive play.
5. Set Sag and Air Pressure: After installation, set the air pressure using a shock pump. The recommended air pressure will vary depending on the rider’s weight, but a good starting point is to aim for around 30–35% sag. You can adjust this later for a more tailored fit.

Adjustment and Customization for Ride Quality

One of the standout features of the Topaz 2.0 Limited Edition is its adjustability, allowing riders to fine-tune their ride to suit various terrain types and riding styles. Below are the key adjustments that influence ride quality.

Compression Adjustment

The Topaz 2.0 offers both high and low-speed compression adjustments. This allows you to modify the shock’s responsiveness depending on the type of terrain you are riding on.

• High-Speed Compression: Adjusts the shock’s damping under rapid compression forces, such as hitting drops or aggressive landings. A softer setting can be used for trail riding, while a firmer setting is better for high-speed stability.
• Low-Speed Compression: Affects the shock’s behavior during slow, controlled movements, such as climbing or rolling over technical terrain. Dialing in the right amount of low-speed compression will ensure better pedaling efficiency.

Rebound Adjustment

Rebound control is essential for controlling the shock’s return to its original position after compression. The Topaz 2.0 features a rebound knob that allows fine-tuning of this characteristic.

• For a smoother ride, reduce the rebound speed so that the shock doesn’t extend too quickly after compressing. This will help prevent the bike from “bucking” or bouncing when hitting rough sections.
• On the other hand, increasing rebound speed can be useful for controlling how quickly the shock returns during high-speed descents, providing better stability.

Volume Spacers

The Topaz 2.0 Limited Edition includes the option to adjust the volume of the air chamber inside the shock. By adding or removing volume spacers, you can modify the overall feel of the shock, making it more progressive or linear.

• Adding spacers will make the shock more progressive, increasing the resistance towards the end of the stroke. This is ideal for riders who hit big jumps or need additional bottom-out resistance.
• Removing spacers will make the shock feel more linear, allowing for better small-bump sensitivity, ideal for riders who frequently ride on technical trails and need maximum plushness.

Lockout Feature

The lockout function on the Topaz 2.0 is an essential feature for riders who want to reduce pedal bob when climbing. This feature is useful during sustained climbs on smooth trails, where you don’t need full suspension travel. Engaging the lockout stiffens the shock, improving pedaling efficiency.

Troubleshooting Common Issues

Despite its precision engineering, you may encounter some issues with the Topaz 2.0 Limited Edition rear shock. Here are some common troubleshooting tips.

Shock is Too Soft or Too Firm

• Air pressure too low: If the shock feels too soft, increase the air pressure using a shock pump. Ensure the pressure matches your weight and riding style.
• Air pressure too high: Conversely, if the shock is too firm, reduce the air pressure. Remember that the goal is to achieve around 30-35% sag for a balanced ride.

No Rebound or Slow Rebound

• Air pressure: Check the air pressure settings, as insufficient air can cause sluggish rebound.
• Incorrect rebound settings: If the rebound is too slow, turn the rebound knob clockwise to increase the speed. For too fast, turn it counterclockwise.

No Compression Adjustment

• Blocked or worn damper: If the compression adjustment does not seem to change the ride quality, the damper may be blocked or internally damaged. It is advisable to send the shock to a professional for inspection and service.

Maintenance for Optimal Performance

Regular maintenance is key to ensuring your Topaz 2.0 Limited Edition performs at its best for the long term. Below are the recommended maintenance tasks.

Cleaning and Lubrication

• Clean the shock: After every ride, wipe down the shock with a clean rag to remove dirt and debris that may cause wear over time. Pay close attention to the seals and the area around the mounting points.
• Lubricate the shock’s seals: Apply a small amount of sealant grease to the shock’s seals to maintain their functionality. This helps reduce friction and prevents dirt from entering the shock.

Air Canister and Suspension Fluid Servicing

• Periodically, the air canister and suspension fluid may need servicing. This involves removing the air canister, draining the fluid, and replacing it with fresh oil. This is best done by a professional technician if you’re not familiar with the process.

Check the Mounting Bolts

• Routinely check the mounting bolts for tightness, especially after rough rides. Use a torque wrench [paid link] to ensure the correct torque settings are followed to avoid damaging the shock or the frame.

Compatibility with Other Drivetrain Components

The Topaz 2.0 Limited Edition rear shock is compatible with most modern mountain bike frames, particularly those designed with advanced suspension systems. However, compatibility with other drivetrain components, such as chainrings, derailleurs, and shifters, generally does not affect the shock’s performance. Ensuring the correct frame geometry is important, as the shock’s travel and overall performance are influenced by the frame design.

Comparison with Other Rear Shocks

Compared to other rear shocks in the same category, the Topaz 2.0 stands out due to its customizable features and premium build quality. It offers finer adjustments in both compression and rebound, providing a higher level of personalization for riders who demand the best suspension tuning. The combination of low-speed and high-speed compression adjustment, volume spacers, and lockout functionality places it ahead of other competitors in terms of ride quality and versatility.

In comparison, many budget options and even some mid-range shocks may lack the level of adjustability seen in the Topaz 2.0. These alternatives often rely on basic rebound and compression features, which may not offer the same fine-tuned performance.

Overall, the Topaz 2.0 Limited Edition rear shock is ideal for riders looking for a premium suspension solution with extensive adjustability and top-tier performance, ensuring a smoother, more controlled ride across various trail conditions.