How to change Trek Slash Frame Bearings

Is your Trek Slash bike feeling a bit rough around the edges lately? Perhaps it's time to show its frame bearings some care. As time passes, the pivot bearings within your bike's frame can experience wear, leading to diminished performance and potential safety issues. But fret not! In this detailed guide, we'll meticulously guide you through the process of changing the frame bearings on your Trek Slash bike, ensuring smooth rides for miles to come. Swapping out your Trek Slash frame pivot bearings is a relatively straightforward task, especially with the assistance of the Trek Slash MAX Full Complement Bearing Kit from Spark Sports.

When to Change Trek Slash Frame Bearings?

Before diving into the nitty-gritty of bearing replacement, let's talk about when it's time to consider this maintenance task. If you notice any of the following signs during your rides, it may be a telltale indication that your frame bearings are due for a refresh:

1. Excessive Play: When rocking your bike back and forth, if you feel looseness or play in the frame, it could be a sign of worn-out bearings. Movement of the seat stays and chain stays often is a symptom of worn out and old bearings that should be changed with a new pivot bearing kit for the Trek Slash.
2. Unusual Noises: Squeaking, grinding, or clunking sounds coming from your bike's frame while riding are often indicative of bearing wear. Sand and dirt particulates can get under old bearing seals, which can lead to them wearing out.
3. Stiff Suspension: If your bike's suspension feels less responsive or stiffer than usual, it may be due to deteriorating frame bearings. A new set of Slash frame pivot bearings is the solution for a mountain bike with stiff suspension, in conjunction with routine suspension servicing.
4. Visible Wear: Inspect your frame bearings visually for signs of rust, corrosion, or uneven wear. Any of these could signal the need for replacement. The main pivot bearings of the Trek Slash are subject to a lot of abuse from riding on the trails in harsh weather, so be sure to routinely check on them for wear and tear.

Remember, regular inspection and maintenance can help catch bearing issues early, preventing more significant problems down the road, such as a damaged frame from not changing the frame bearings sooner.

How Often Should I Change Trek Slash Bearings?

Now that you know when to look out for bearing issues, you might wonder how often you should replace them preventatively. The frequency of bearing replacement can vary based on several factors, including:

- Riding Conditions: If you frequently ride in harsh conditions such as mud, dust, or water, your bearings may wear out more quickly and require more frequent replacement. Those of us who ride in wetter and harsher environments should pay particular attention to Trek Slash frame bearings.

- Mileage: High mileage riders may need to replace their frame bearings more often than occasional riders, as the wear and tear accumulate over time.

- Maintenance Habits: Regular cleaning, lubrication, and inspection can prolong the lifespan of your bearings, potentially extending the time between replacements.

As a general rule of thumb, it's a good idea to inspect your frame bearings annually and replace them as needed based on the signs mentioned earlier.

How to Change Trek Slash Frame Bearings

Preparation:

Before diving into the bearing replacement process, gather the necessary tools and supplies. You'll need:

- Bearing Kit: Ensure you have the correct bearing kit for your Trek Slash frame, fortunately at Spark Sports we stock numerous MAX Full Complement Frame Bearing Kits, including one for the Slash. Click here for a link to purchase!

- Tools: Depending on your bike's specific setup, you may need tools such as hex keys, wrenches, bearing press, and a rubber mallet. A bearing press and puller are necessary tools here to safely remove and install the frame bearings without causing damage to the frame pivots of the mountain bike.

- Workspace: Find a clean, well-lit area to work on your bike. A bike stand or stable support will make the process easier.

Step 1: Removing Old Bearings

Start by removing the old bearings from your Trek Slash frame. Follow these steps:

1. Prep the bike for bearing change : Remove any components obstructing access to the frame bearings, such as wheels, crankset, and rear shock. You may need to use a Bosch chainring tool to remove the chainring to access the main pivot on your Slash to change the main pivot bearings
2. Extract Bearings: Use appropriate tools to carefully extract the old bearings from the frame. Be gentle to avoid damaging the frame or surrounding components. If a bearing feels seized in the frame, use a displacer fluid, such as WD-40 or an anti seize spray with silicone inside to aid the removal of the bearings.
3. Clean the Area: Once the old bearings are removed, take the opportunity to clean the bearing seats and surrounding areas thoroughly. Use paper towel and degreaser to remove old oil residue from the bearing in the frame of the bike.

Step 2: Installing New Bearings

With the old bearings out of the way, it's time to install the new ones. Here's how:

1. Prepare Bearings: Apply a thin layer of grease to the new bearings to aid in installation and improve longevity. A standard bike grease will be perfect for this, if your Trek Slash frame material is carbon fibre, be sure to use a carbon safe grease to avoid damaging your bike frame.
2. Seat Bearings: Carefully press the new bearings into the frame using a bearing press or a suitable tool. Ensure they are seated flush and aligned correctly. The new bearing should enter the bearing cavity in the frame in a straight fashion, not at an angle. Be sure to apply even pressure across the bearing when installing.
3. Reassemble Components: Once all new bearings are installed, reassemble the bike components in the reverse order of removal. Double-check alignment and torque specifications for all bolts and fasteners. 

Step 3: Final Adjustments and Testing

Before hitting the trails, perform final adjustments and testing to ensure everything is in working order:

1. Pivot Bolt Torque: When reassembling the pivots on the Slash, be sure that they are correctly torqued down to the manufacturers specified torque, using thread locker where appropriate.
2. Suspension Setup: Set up your bike's suspension according to manufacturer recommendations. Check sag, rebound, and compression settings for optimal performance.
3. Test Ride: Take your Trek Slash bike for a test ride in a controlled environment. Pay attention to how the suspension feels and listen for any unusual noises or sensations.
4. Fine-tune: Make any necessary adjustments to suspension settings, bearing preload, or component alignment to optimize performance and comfort.

Step 4: Maintenance Tips

To prolong the lifespan of your newly installed frame bearings, follow these maintenance tips:

- Regular Inspections: Periodically inspect your frame bearings for signs of wear, corrosion, or contamination.

- Clean and Lubricate: Keep the bearings clean and properly lubricated to reduce friction and prevent premature wear.

- Replace as Needed: If you notice any issues or signs of wear during inspections, don't hesitate to replace the bearings promptly.

If you're unsure about any aspect of the bearing replacement process, don't hesitate to consult with us at Spark Sports for support. Happy riding!