Tamiya TT-01 Bearing Location Guide

Why Purchase Your Tamiya TT-01 Bearings From FastEddy Bearings?

A complete FastEddy Bearings kit takes the guesswork out of replacing or upgrading the bearings in your Tamiya TT-01. Instead of measuring bushings and bearings and ordering several different sizes individually, the model-specific kit provides the required sizes and quantities together in one package.

FastEddy Bearings uses high-quality steel/chrome bearings with rubber seals designed to help keep contamination out while retaining lubrication.

Choosing FastEddy Bearings gives you:

• Complete model-specific bearing kit
• Correct bearing sizes and quantities
• Rubber-sealed bearings for protection against dirt and moisture
• Excellent upgrade for TT-01 chassis still using factory bushings
• Smoother, more efficient drivetrain performance
• No measuring individual bearings
• No searching for multiple bearing sizes
• Individual 10-packs available for spares and future maintenance
• More than 20 years of bearing experience
• Fast order processing and shipping
• No guesswork required

Whether you're building a new TT-01, upgrading factory bushings, performing routine maintenance, or rebuilding a well-used chassis, the complete FastEddy Bearings kit gives you everything needed in one convenient package—with individual 10-packs available when you need extras.

Complete Tamiya TT-01 Bearing Kit

FastEddy Bearings TFE1389 — 16 Bearings Total

Tamiya TT-01 Chassis Sealed Bearing Kit — TFE1389

Tamiya TT-01 Bearing Location Chart

Why Upgrade the Bearings in a Tamiya TT-01?

The Tamiya TT-01 is a shaft-driven 4WD touring-car chassis, and replacing factory bushings with ball bearings is one of the most useful upgrades for a chassis that was supplied with bushings.

Bushings create more friction than properly installed ball bearings. Replacing them with bearings allows the wheels, differentials and drivetrain shafts to rotate more freely.

A complete bearing upgrade can help provide:

• Reduced drivetrain friction
• Smoother wheel rotation
• Smoother drivetrain operation
• Reduced wear on rotating components
• More consistent performance
• Easier long-term drivetrain maintenance

Unlike modifications designed simply to make the car faster, a complete bearing upgrade improves the basic mechanical operation of the TT-01 drivetrain.

Front Wheel Bearing Locations

The front of the TT-01 uses four 5x11x4 rubber-sealed bearings.

Front Left

• 2 × 5x11x4

Front Right

• 2 × 5x11x4

These bearings support the front axles and allow the wheels to rotate smoothly while still allowing the steering system to change the direction of the wheels.

Rear Wheel Bearing Locations

The rear wheel uprights also use four 5x11x4 rubber-sealed bearings.

Rear Left

• 2 × 5x11x4

Rear Right

• 2 × 5x11x4

These bearings support the rear axles and allow them to rotate with less friction as drivetrain power is delivered to the rear wheels.

Front Differential Bearing Locations

The front differential is supported by two 8x12x3.5 rubber-sealed bearings.

Front Differential

• 2 × 8x12x3.5 — 1 per side

The front differential input / bevel-pinion area also uses:

• 2 × 5x11x4

These bearings support the front gearbox components and help maintain proper drivetrain alignment.

Rear Differential Bearing Locations

The rear differential is supported by another two 8x12x3.5 rubber-sealed bearings.

Rear Differential

• 2 × 8x12x3.5 — 1 per side

The rear drivetrain also uses:

• 1 × 5x11x4 — Rear differential input / bevel-pinion shaft support
• 1 × 5x11x4 — Spur gear / rear propeller-joint support

These bearings help support the components that transfer motor power through the TT-01's shaft-driven 4WD system.

Complete TT-01 Bearing Count

5x11x4 Rubber-Sealed Bearings — 10 Pack — Qty 12 in Kit

• Front wheel uprights — 4
• Rear wheel uprights — 4
• Front differential input / bevel-pinion shaft support — 2
• Rear differential input / bevel-pinion shaft support — 1
• Spur gear / rear propeller-joint support — 1

Total: 12

8x12x3.5 Rubber-Sealed Bearings — 10 Pack — Qty 4 in Kit

• Front differential — 2
• Rear differential — 2

Total: 4

Total Bearings: 16

All 16 bearings in the FastEddy Bearings TFE1389 TT-01 kit are accounted for.

Tamiya TT-01 Exploded Views

Tamiya's assembly manual and exploded diagrams are useful references when installing the bearings because they show the relationship between the wheel uprights, gearboxes, differentials, bevel gears, propeller shaft and spur gear.

Tamiya TT-01 Manual and Exploded Views

Use the exploded views along with this bearing-location guide when servicing the:

• Front wheel uprights
• Rear wheel uprights
• Front differential
• Rear differential
• Front and rear bevel-pinion assemblies
• Propeller shaft
• Spur gear and rear drivetrain

When disassembling an existing TT-01, work on one section at a time and compare each replacement bearing with the bearing or bushing being removed before installation.

When Should TT-01 Bearings Be Replaced?

Even quality bearings eventually wear, particularly in RC vehicles exposed to dirt, moisture and repeated use.

Check your TT-01 bearings during routine maintenance. A bearing should be inspected if you notice roughness when turning it by hand, excessive play, noise, resistance, rust or visible contamination.

If several bearings are worn or you're completely rebuilding the chassis, replacing the entire bearing set at once can save time compared with repeatedly disassembling the vehicle as additional bearings wear out.

Complete Kit or Individual Bearings?

For a complete TT-01 build, upgrade or rebuild, the FastEddy Bearings TFE1389 Complete TT-01 Bearing Kit is the easiest solution because all 16 bearings are supplied together.

If you only need replacements or want spares in your toolbox, FastEddy Bearings also offers 5x11x4 bearings in a 10-pack and 8x12x3.5 bearings in a 10-pack.

Final Thoughts

The Tamiya TT-01 is a simple and durable RC platform, and replacing factory bushings or worn bearings is one of the most practical drivetrain upgrades you can make.

The FastEddy Bearings TFE1389 Tamiya TT-01 Sealed Bearing Kit provides all 16 bearings needed for the chassis in one convenient package.

Knowing exactly where each bearing goes makes installation and future maintenance much easier. And whenever an individual bearing needs replacing, the 5x11x4 10-pack and 8x12x3.5 10-pack make it easy to keep spares on hand.

With a complete model-specific FastEddy Bearings kit, there is no measuring old bearings, no searching for individual sizes and no guesswork required.