The Mara Inline Trunnion [paid link] Rear Shock from Manitou is a high-performance shock designed for riders who demand precision, durability, and optimal performance on rough terrain. Known for its exceptional adjustability and refined dampening system, this rear shock has earned a reputation among both professional riders and weekend enthusiasts. In this guide, we’ll take a closer look at the installation, maintenance, and optimization of the Mara Inline Trunnion [paid link], as well as troubleshooting tips and comparisons with similar models.

Tools Required

To install, adjust, or maintain the Mara Inline [paid link] Trunnion Rear Shock, the following tools are required:

• 5mm hex wrench
• Torque wrench [paid link] (up to 10 Nm)
• Shock pump
• 2mm hex wrench
• Isopropyl alcohol (for cleaning)
• Soft cloth or rag
• Grease (light)
• Manitou-specific spacers or volume reducers (if required for customization)

Installation of the Mara Inline Trunnion Rear Shock

Step 1: Preparation

Before installing the rear shock, ensure that your bike’s frame is compatible with a trunnion mount. The Mara Inline [paid link] Trunnion uses a specific mount interface, so check the measurements and compatibility with your bike’s frame.

Step 2: Mount the Shock

• Align the shock with the trunnion mount interface on the frame.
• Insert the mounting hardware (typically, bolts or screws) through the shock’s eyelets and into the frame.
• Tighten the mounting hardware using a 5mm hex wrench. Ensure a snug fit, but do not over-tighten to avoid damaging the threads or frame.
• Set the torque to the recommended value, typically around 10 Nm, using a torque wrench [paid link].

Step 3: Setup Air Pressure

• Use a shock pump to adjust the air pressure in the shock. Start by setting the air pressure according to your rider weight and the manufacturer’s recommendations (usually around 200-250 psi for most riders).
• For the best performance, it’s important to fine-tune the air pressure based on personal preference and riding conditions.

Step 4: Final Check

Double-check the alignment and the tightness of all bolts. Inspect the shock for any signs of damage or misalignment before riding.

Adjusting the Mara Inline Trunnion Rear Shock

The Mara Inline Trunnion features a variety of adjustability options, allowing you to customize your ride for different terrain and conditions. Here’s how to adjust the shock:

Rebound Adjustment

• The rebound dial, located at the base of the shock, controls how quickly the shock returns to its original position after compression.
• Turn the dial clockwise to slow down the rebound or counterclockwise to speed it up. The goal is to find a setting that provides controlled, yet responsive damping.

Compression Adjustment

• The Mara Inline Trunnion also features adjustable compression damping, which allows you to control how the shock behaves under load.
• The compression knob typically has separate low-speed and high-speed adjustments. Adjusting the low-speed compression affects how the shock responds to small impacts and trail chatter, while the high-speed compression controls larger impacts.

Volume Spacers

• If your riding style or trail conditions require more support or a more progressive feel, you can install volume spacers inside the shock.
• This will change the shock’s ramp-up at the end of the stroke, providing more control during hard compressions or big hits. Manitou offers specific volume reducers for this purpose, which can be added or removed based on your needs.

Maintenance of the Mara Inline Trunnion Rear Shock

Regular maintenance is crucial to ensuring the longevity and performance of your Mara Inline Trunnion Rear Shock. Follow these steps for proper upkeep:

Cleaning the Shock

• Periodically clean the shock to prevent dirt, dust, and mud from accumulating. This will help prevent damage and ensure smooth operation.
• Use a soft cloth and isopropyl alcohol to wipe down the shock’s exterior. Be sure to clean the seals and any exposed moving parts.

Replacing the Seals

• Over time, the seals on the shock may wear out, leading to air leaks and loss of performance.
• Replace the seals regularly based on your riding conditions. Manitou offers seal kits specifically designed for the Mara Inline Trunnion that are easy to install with basic tools.

Checking for Leaks

• Inspect the shock for any signs of oil leakage. If you notice oil around the shock’s body or mounting hardware, it may indicate a damaged seal or internal issue that needs attention.
• If a leak is detected, it’s essential to either replace the seals or take the shock to a qualified mechanic for a full rebuild.

Troubleshooting Common Set-Up Issues

Here are a few common issues and solutions when setting up or maintaining the Mara Inline Trunnion Rear Shock:

Issue 1: Sag is Too High or Too Low

If you’re not achieving the desired sag (around 30-35% of the shock’s total travel), it could be due to improper air pressure. Adjust the air pressure using a shock pump to fine-tune it. Remember, the ideal sag varies depending on rider weight and preferences, so make small adjustments as needed.

Issue 2: Rebound Is Too Slow or Too Fast

If the rebound is too fast, the shock may feel too springy or out of control. If it’s too slow, the shock will not return quickly enough, leading to a sluggish ride. Adjust the rebound dial to achieve a balanced feel—usually, a moderate speed is best for most riders.

Issue 3: Compression Settings Are Too Stiff or Too Soft

If the shock feels too harsh or too soft on impacts, adjust the low and high-speed compression dials accordingly. If you prefer a firmer, more controlled ride, increase the compression settings. If you want a softer, more plush feel, dial back the compression.

Customization and Optimization for Better Performance

To achieve the best performance from the Mara Inline Trunnion, it’s essential to fine-tune the shock according to your specific needs and riding style. Here are a few tips to optimize performance:

Adjust for Terrain

• For aggressive trails with big drops and rough terrain, increase the high-speed compression and consider adding a volume spacer to provide more progressive support at the end of the shock stroke.
• For smoother trails or cross-country riding, reduce the high-speed compression to allow for a more plush, responsive feel.

Set Up for Weight and Riding Style

• Adjust the air pressure according to your body weight, but don’t be afraid to experiment with slightly higher or lower pressures to find your ideal balance between plushness and support.
• If you’re a more aggressive rider, you may want to set up your shock with a slightly firmer compression and higher air pressure to avoid bottoming out during big hits.

Comparison with Similar Models

When comparing the Mara Inline Trunnion Rear Shock with other similar models in the market, a few key differences stand out:

vs. Fox Float X2

• The Fox Float X2 is known for its superior adjustability and performance, but the Mara Inline offers a more budget-friendly alternative with similar performance characteristics. The Mara is slightly more straightforward to tune for riders who prefer simplicity without sacrificing key features.

vs. RockShox Super Deluxe

• The RockShox Super Deluxe offers excellent performance with a focus on adjustable compression and rebound damping, but the Mara Inline Trunnion stands out with its ability to fine-tune air volume, making it ideal for riders seeking a more customized ride.

Compatibility with Other Drivetrain Components

The Mara Inline Trunnion Rear Shock is compatible with most modern mountain bike frames that use a trunnion mount. However, it’s important to ensure that your bike’s rear triangle and suspension linkage can accommodate the shock’s dimensions and stroke length.

Before installation, always check the manufacturer’s recommendations and ensure that your bike’s frame is compatible with the shock’s specifications, including eyelet size and stroke length.