The ElevenSix Trunnion [paid link] rear shock from Push Industries is a high-performance component designed to deliver top-tier damping and adjustability for serious mountain bikers. Whether you’re hitting rugged [paid link] trails or tackling technical descents, achieving optimal performance from your shock is key to maintaining control and comfort. This guide will take you through the entire process of tuning, maintaining, and troubleshooting your ElevenSix Trunnion [paid link] rear shock.
Tools Required
- Shock pump
- Torque wrench [paid link]
- 5mm and 6mm hex keys [paid link]
- Fluid for cleaning
- Microfiber cloth
- Compressed air or air nozzle
- Small screwdriver (flathead)
- Ruler or caliper (for measuring sag)
Installation of the ElevenSix Trunnion
Installing the ElevenSix Trunnion rear shock requires precision to ensure it functions correctly from the start. Follow these steps to install the shock on your bike.
Step 1: Preparation
Before starting, make sure your bike frame is clean and free from dirt and debris. This will help ensure a smooth installation and prevent damage to both the frame and the shock.
Step 2: Remove the Existing Shock (if applicable)
If you’re replacing an existing shock, use the appropriate tools (usually a 5mm or 6mm hex key) to remove the old shock. Take note of the shock mount positions as you’ll need to replicate them on your new shock.
Step 3: Installing the ElevenSix Trunnion
Align the eyelet on the ElevenSix Trunnion shock with the shock mount on the frame. Ensure the shock’s trunnion mount is securely positioned into the frame’s mount, ensuring a tight fit.
Step 4: Tighten the Mounting Bolts
Using a torque wrench [paid link], tighten the shock mounting bolts to the manufacturer’s specified torque (usually around 150-180 in-lbs). Over-tightening can cause damage, while under-tightening can lead to a loose fit.
Step 5: Adjust the Air Pressure
Use a shock pump to set the recommended air pressure based on your weight and riding style. Most riders will want to set the air pressure to achieve the recommended sag (around 25-30% of travel). You can check this by pressing down on the saddle and measuring how much the shock compresses.
Step 6: Double-check Installation
Before moving on, ensure that all bolts are tight and there are no gaps between the shock and frame. It’s essential that the shock sits securely in place.
Tuning the ElevenSix Trunnion for Performance
To maximize the performance of your ElevenSix Trunnion rear shock, you’ll need to fine-tune it based on your weight, riding style, and the type of terrain you ride. Push Industries’ ElevenSix offers several adjustments for damping, including rebound, compression, and high-speed compression. Here’s how to adjust each of them:
Rebound Adjustment
Rebound damping controls how quickly the shock returns to its original position after compression. Too fast, and the bike can become bouncy; too slow, and it can feel sluggish. To adjust the rebound:
- Turn the rebound dial (located on the bottom of the shock) counterclockwise to increase rebound speed (faster return).
- Turn the dial clockwise to slow the rebound (slower return).
- Make small adjustments and test by riding. Generally, the rebound should be set so that the shock returns smoothly without creating a harsh rebound effect.
Compression Adjustment
Compression damping controls how the shock absorbs impacts, such as bumps or drops. The ElevenSix Trunnion has both low-speed and high-speed compression adjustments.
Low-Speed Compression
Low-speed compression controls the shock’s response to slower, more gradual compressions like pedal strokes and smaller bumps. To adjust:
- Turn the low-speed compression knob (usually on the side of the shock) clockwise for a firmer feel or counterclockwise for a softer feel.
- Ride the bike and assess whether the shock is too stiff or soft for your needs.
High-Speed Compression
High-speed compression adjusts the shock’s response to more aggressive impacts, such as drops or high-speed hits. Adjust this by:
- Turning the high-speed compression dial clockwise to stiffen the shock’s response to big hits.
- Turning it counterclockwise will make it more plush.
Air Pressure and Sag
The air pressure in the shock affects how much sag you experience while riding. To adjust:
- Set the air pressure using a shock pump according to the weight recommendations.
- Measure your sag by sitting on the bike and measuring how much the shock compresses.
- Aim for 25-30% of the shock’s travel as sag. If the sag is too high, add more air. If it’s too low, release some air.
Maintaining Your ElevenSix Trunnion
Proper maintenance will ensure that your ElevenSix Trunnion rear shock continues to perform at its best. Here’s how to maintain it:
Cleaning the Shock
- After each ride, wipe the shock with a clean, dry microfiber cloth to remove dirt and debris.
- If the shock is particularly dirty, use a mild cleaner and soft cloth to gently clean it, avoiding harsh chemicals that could damage the shock.
Checking for Leaks
Inspect the shock for any signs of fluid leakage. A small amount of oil around the seals is normal, but if you notice significant leaking, you may need to service the shock.
Periodic Servicing
It is important to regularly check the seals and internal components. Push Industries recommends a full rebuild every 100-150 hours of riding or annually, whichever comes first. This includes checking the shock’s internal oil and servicing the dampers.
Replacing the Air Canister
If you find the air canister leaking or losing pressure, it may need to be replaced. Contact Push Industries or an authorized service center for a replacement.
Troubleshooting Common Setup Issues
Even with the highest-quality components like the ElevenSix Trunnion, issues can arise. Here are some common problems and their solutions:
Problem 1: Excessive Sag or Bottoming Out
If you’re bottoming out too easily or have excessive sag, the air pressure might be too low. To resolve this:
- Increase the air pressure in 5-10 PSI increments and check the sag again.
- Ensure the compression settings are not too soft for your riding style.
Problem 2: Too Much Rebound
If your shock feels overly bouncy or the bike feels uncontrollable after compression, the rebound might be too fast. Adjust the rebound dial clockwise to slow it down.
Problem 3: Lack of Support or Plushness
If the shock feels too stiff or unresponsive to small bumps, the compression settings might be too firm. Adjust the low-speed compression to a softer setting and test again.
Customizing the ElevenSix Trunnion for Optimal Performance
To further tailor your ElevenSix Trunnion rear shock to your needs, consider adjusting the following elements:
Shock Volume Spacers
Volume spacers adjust the shock’s progressiveness. Adding spacers makes the shock feel more linear throughout its travel, while removing them increases bottom-out resistance. Test different configurations to match your riding style.
Air Canister Volume
For riders who need more sensitivity in the initial part of the shock’s travel, using a larger air canister or adjusting its volume can help. A larger air canister reduces the initial stiffness and improves sensitivity.
Compatibility with Other Drivetrain Components
The ElevenSix Trunnion rear shock is compatible with most modern mountain bike frames that support trunnion mount shocks. However, always check your bike’s specifications to ensure compatibility. The shock’s performance can also be affected by your bike’s geometry, suspension system, and overall weight distribution.
Comparison with Similar Models
While the ElevenSix Trunnion is a top-tier choice, comparing it to other shocks like the Fox Float X2 or RockShox Super Deluxe can help riders decide the best fit for their needs. The ElevenSix is known for its exceptional customization options, while the Fox Float X2 offers a more forgiving ride. The RockShox Super Deluxe is a great value shock with similar features but lacks the level of fine-tuning available with the ElevenSix.