Traxxas Slash 4WD : Bearing Locations and Sizes

The Traxxas Slash has earned its reputation as one of the most popular RC short course trucks ever built. Whether you're racing on the track, bashing in the backyard, or launching off jumps, your bearings play a critical role in keeping the truck running smoothly and efficiently.

At FastEddy Bearings, we've supplied thousands of bearing kits for the Traxxas Slash, helping hobbyists restore performance and extend the life of their trucks.

One of the most common questions we hear is:

"Where do all the bearings go, and what size are they?"

This guide covers the most common bearing locations on the Traxxas Slash 4X4. Slash 2WD models use a different bearing layout and bearing sizes.

Front Steering Blocks

The front steering blocks contain two bearings per side.

Typical bearing sizes:

• 5×11×4 mm outer bearing
• 10×15×4 mm inner bearing

These bearings support the front wheels while handling steering loads, cornering forces, hard landings, and side impacts.

Because they are exposed to dirt, moisture, and impacts, the steering-block bearings are among the most frequently serviced bearings on the Traxxas Slash.

Rear Hub Carriers

Each rear hub carrier typically uses:

• 5×11×4 mm outer bearing
• 10×15×4 mm inner bearing

These bearings support the weight of the truck while handling acceleration, braking, cornering, and jump landings.

Excessive movement at the rear wheels can be a sign of worn hub-carrier bearings.

Front Differential

The front differential assembly uses bearings including:

• 8×16×5 mm
• 10×15×4 mm
• 6×12×4 mm

These bearings support the differential and input gears while allowing power to transfer smoothly to the front wheels.

Worn differential bearings can cause drivetrain noise, rough operation, excessive gear movement, and premature ring-and-pinion wear.

Rear Differential

The rear differential uses bearing sizes including:

• 8×16×5 mm
• 10×15×4 mm
• 6×12×4 mm

The rear differential handles a large portion of the truck's acceleration load.

Keeping these bearings in good condition helps reduce drivetrain drag and protects the differential gears from unnecessary wear.

Center Driveline

The center driveline uses bearings including:

• 10×15×4 mm
• 12×18×4 mm
• 5×11×4 mm

These bearings support the center drivetrain components and allow power to transfer smoothly between the front and rear differentials.

Worn center-driveline bearings can create vibration, noise, drag, and inconsistent power delivery.

Steering Bellcranks

The steering bellcranks use:

• 5×8×2.5 mm

Although these bearings are small, they play an important role in steering performance.

Properly functioning bellcrank bearings help provide:

• Smoother steering
• Faster steering response
• Reduced steering slop
• More precise control

Why Replace the Entire Bearing Kit?

Many owners replace only the bearing that has failed.

However, once one bearing wears out, the remaining bearings may have similar hours of use and exposure to dirt, water, and impacts.

A complete FastEddy Bearings kit provides:

• The chassis bearings needed for the listed Traxxas Slash model
• No measuring individual bearings
• No searching for multiple part numbers
• Consistent bearing quality throughout the truck
• One complete installation instead of several future repairs
• No guesswork required

Replacing all the chassis bearings at the same time helps restore smooth operation throughout the drivetrain.

Complete FastEddy Bearings Kit Contents

The applicable FastEddy Bearings Traxxas Slash 4X4 kit may include bearing sizes and quantities such as:

• 6 × 5×11×4 mm
• 5 × 10×15×4 mm
• 4 × 6×12×4 mm
• 4 × 5×8×2.5 mm
• 2 × 12×18×4 mm
• 2 × 8×16×5 mm
• 2 × 5×10×4 mm

Traxxas has produced several Slash versions, and aftermarket parts may change the required bearing sizes. Always verify the exact model number and kit description before ordering.

Rubber Sealed Bearings for Real RC Conditions

The Traxxas Slash is frequently driven in:

• Dirt
• Dust
• Grass
• Gravel
• Mud
• Damp conditions

For most Slash owners, FastEddy Bearings recommends rubber sealed bearings because they provide better protection against dirt and moisture than metal shielded bearings.

Rubber sealed bearings generally offer:

• Better contamination protection
• Improved moisture resistance
• Longer service life
• Reduced maintenance
• Reliable performance in off-road conditions

Signs Your Slash Bearings Need Replacement

Inspect your bearings if you notice:

• Grinding or roughness
• Excessive wheel play
• Increased drivetrain noise
• Rust or corrosion
• Reduced runtime
• Loss of speed
• Drivetrain vibration
• Rough differential operation

Replacing worn bearings early can help prevent damage to axles, gears, differential cases, and other drivetrain components.

Traxxas Slash Bearing Maintenance Tips

• Blow dirt and dust off the truck after every run.
• Avoid spraying bearings directly with high-pressure water.
• Inspect wheel bearings regularly.
• Clean and lubricate bearings after wet or muddy runs.
• Check differential bearings during drivetrain maintenance.
• Replace damaged seals.
• Replace bearings that remain rough after cleaning.

Why Choose FastEddy Bearings?

For more than 20 years, FastEddy Bearings has supplied quality replacement bearings to RC enthusiasts around the world.

FastEddy Bearings Traxxas Slash kits offer:

• Complete model-specific bearing selections
• High-quality rubber sealed bearings
• Smooth and reliable performance
• Fast order processing
• No guessing which sizes to buy
• Bearings for both routine maintenance and complete rebuilds

Whether you're rebuilding a race truck, restoring a used Slash, or refreshing your favorite basher, FastEddy Bearings makes it easy to get the bearings you need.

Frequently Asked Questions

Does one bearing kit fit every Traxxas Slash?

No. The Slash 2WD and Slash 4X4 use different bearing layouts. Different model years, versions, and aftermarket upgrades may also require different bearing sizes.

Should I replace all the bearings at once?

If the truck has many hours of use or has been exposed to dirt, mud, sand, or water, replacing the complete chassis-bearing set is often the best long-term choice.

Are rubber sealed bearings best for the Traxxas Slash?

For most Slash owners, yes. Rubber sealed bearings provide better protection against dirt and moisture and require less maintenance than metal shielded bearings.

How do I confirm which bearing kit I need?

Check the model number of your Traxxas Slash and compare it with the exact model information listed in the FastEddy Bearings product description.

Final Thoughts

The Traxxas Slash is built for demanding use, but every jump, corner, and hard landing puts stress on its bearings.

Replacing worn chassis bearings with a complete FastEddy Bearings kit helps restore efficiency, improve reliability, and protect expensive drivetrain components.

When you install a complete model-specific kit, you're not just replacing worn bearings—you're helping restore the smooth performance your Traxxas Slash was designed to deliver.

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