Maintaining your Unair TR [paid link] rear shock is crucial for ensuring optimal performance and longevity. Regular preventative maintenance will not only extend the lifespan of your shock but also improve its efficiency, allowing for a smoother and more responsive ride. In this guide, we will cover the steps for installation, adjustment, troubleshooting, and maintenance of the Unair TR [paid link] rear shock, along with how to optimize it for better performance.

Tools Required

Before beginning the maintenance, ensure that you have the following tools ready:

• 5mm and 6mm Allen wrenches [paid link]
• Torque wrench [paid link]
• Shock pump
• Suspension grease
• Clean rags
• Isopropyl alcohol (for cleaning)
• Bike stand [paid link] or secure frame holder
• Silicone-based shock oil (for servicing)
• Small brush for cleaning
• Flathead screwdriver

Installation of the Unair TR Rear Shock

Installing the Unair TR rear shock requires a precise setup to ensure the shock works effectively with your frame. Follow these steps for correct installation:

1. Prepare the Frame: Ensure that the rear triangle of your bike is clean and free of any dirt or debris. Check the mounting areas for any wear or damage.
2. Align the Shock Mounting Points: Line up the shock’s mounting eyelets with the frame’s designated shock mounts. Make sure the shock is positioned correctly according to the design of your bike.
3. Install the Mounting Bolts: Use the correct size bolts to secure the shock in place. Tighten each bolt gradually to avoid misalignment. Torque them to the manufacturer’s recommended settings to prevent over-tightening or under-tightening.
4. Check the Suspension Linkage: Ensure that the shock linkage moves smoothly, without any binding or friction. If necessary, lubricate the shock’s pivots with a small amount of suspension grease.
5. Set the Sag: Use a shock pump to adjust the air pressure to the recommended settings for your weight and riding style. Check that the shock sags about 25-30% of its total travel when you sit on the bike.

Adjustment of the Unair TR Rear Shock

Adjusting your Unair TR rear shock is essential for fine-tuning the ride quality to match your needs. Here’s how to adjust various settings:

Air Pressure Adjustment

The air pressure directly affects the shock’s sag, which in turn influences ride quality and comfort.

• Use a shock pump to adjust the air pressure based on your body weight. Refer to the manufacturer’s recommended pressure range, typically found in the owner’s manual.
• Check the sag after adjustments. A general guideline is 25-30% of the shock’s total travel should be used when the rider is on the bike.

Rebound Adjustment

Rebound damping controls the speed at which the shock returns to its original position after compression.

• Turn the rebound dial, located at the base of the shock, clockwise to slow the rebound and counterclockwise to speed it up.
• Test the rebound by pressing down on the bike to compress the shock, then release. Adjust until the shock returns to its position without feeling too slow or too fast.

Compression Adjustment

The compression setting determines how much the shock resists being compressed under force.

• Adjust the compression dial to match your riding style. A higher compression setting is suited for aggressive riders, while a lower setting works for smoother, cross-country riding.
• Gradually adjust and test until you achieve the desired level of firmness without sacrificing comfort.

Troubleshooting Common Set-Up Issues

There are several common issues riders may encounter when using the Unair TR rear shock. Below are some troubleshooting tips for these problems.

Shock Doesn’t Hold Air

If your shock loses air pressure rapidly:

• Check the shock’s air valve for any signs of leakage. If the valve is damaged, replace it immediately.
• Inspect the seals and O-rings for wear. If necessary, replace the seals using a kit designed for your Unair TR shock.
• If the issue persists, consult with a professional mechanic to inspect for internal damage.

Excessive Bottoming Out

If the shock is bottoming out too easily (compressing fully during use):

• Increase the air pressure using a shock pump. This can help reduce bottoming out and provide more support.
• Adjust the rebound damping to prevent the shock from compressing too quickly.
• Check if the shock is set to the proper sag, as excessive sag can contribute to bottoming out.

Poor Rebound Control

If the shock rebounds too slowly or too quickly:

• Adjust the rebound damping by turning the dial to find a comfortable setting.
• If the rebound is still inconsistent, check the shock for oil contamination or leaks, which could cause malfunctioning.

Preventative Maintenance for Longevity

Regular maintenance will help extend the life of your Unair TR rear shock and ensure it performs at its best. Here’s a guide on keeping the shock in prime condition.

Cleaning

Dirt and grime can degrade the performance of the shock over time. Regularly clean your shock to keep it operating smoothly.

• After every ride, wipe down the shock body with a clean rag to remove dirt and debris.
• Periodically, use isopropyl alcohol to clean the shock’s seals and stanchions. This will prevent dirt buildup that can cause wear.

Lubricating the Seals

Lubricating the shock’s seals ensures smooth movement and prevents wear.

• Use silicone-based suspension oil to lubricate the seals. Apply a small amount on a cloth and gently wipe the stanchions. Be careful not to use too much oil, as it can attract dirt.

Air Can Service

It’s essential to maintain the shock’s air can for optimal performance. SR Suntour recommends servicing the air can annually or after every 100 hours of riding.

• Carefully remove the air can and inspect for any wear or damage to the internal parts.
• Clean the components and lightly grease the air can seals before reinstalling it.

Inspecting Internal Components

At least once a year, inspect the shock’s internal components, including the damper and piston.

• If you notice any inconsistencies in performance (such as poor rebound or compression damping), consider having a professional mechanic service the shock.
• Internal servicing may include oil changes and seal replacements, ensuring that the shock remains responsive and smooth.

Comparison with Similar Models

While the Unair TR rear shock is an excellent choice for many riders, it’s useful to compare it with other similar models to see how it stacks up in terms of performance and features.

Unair TR vs. SR Suntour Aion

The Unair TR rear shock is designed for all-around performance, offering a great balance between comfort and control. In comparison, the SR Suntour Aion is a more aggressive shock, providing a firmer feel suited for enduro and downhill riders. Both shocks share similar air pressure and rebound adjustment features, but the Aion offers more travel and stiffer compression settings.

Unair TR vs. Fox Float DPS

The Fox Float DPS is another popular rear shock. While the Fox Float DPS provides excellent customization options with three-position compression damping, the Unair TR offers a simpler adjustment interface that may appeal to riders who prefer ease of use. The Unair TR is often favored by XC riders, while the Fox Float DPS is better suited for riders who need more specialized damping controls.

Compatibility with Other Drivetrain Components

The Unair TR rear shock is compatible with most modern full-suspension frames, but compatibility should always be confirmed with the manufacturer’s specifications. The shock’s mounting system typically uses a 200mm or 210mm eye-to-eye length and can fit frames designed for shocks of these dimensions. It’s important to check that the shock’s stroke length matches your bike’s rear triangle for optimal performance.

If you’re considering upgrading your drivetrain, make sure the shock you choose is compatible with your frame’s geometry. The Unair TR is a versatile [paid link] option for a wide range of bike types, from XC to trail bikes.

Conclusion

Proper maintenance, regular cleaning, and correct adjustments are key to getting the best performance out of your Unair TR rear shock. By following the guidelines outlined above, you can keep your shock running smoothly and enjoy a responsive, comfortable ride.