Bearing Spacer Assembly For Royal Enfield UCE Rear Wheel Drum Models

Part No. 146499/B

Part Details & Function

• Part Name: Bearing Spacer Assembly – Rear Hub (or RR HUB SPACER ASSY).
• Function: This spacer is a metal tube or sleeve that fits between the two bearings inside the rear wheel hub. Its primary job is to ensure that when the axle nut is tightened, the force is transmitted through the spacer to the inner races of the bearings, not to the ball bearings themselves. This maintains the correct distance, alignment, and free rotation of the wheel and prevents premature bearing failure.
• Compatibility (UCE Drum Models): This typically applies to Royal Enfield UCE models that use a rear drum brake, such as:
  • Royal Enfield Standard 350 / 500 (UCE)
  • Royal Enfield Electra 350 / 500 (UCE)
  • Royal Enfield Classic 350 / 500 (Early UCE models, typically BS3/BS4, that had a rear drum brake)

🔍 Common Part Numbers

The genuine Royal Enfield part number for the rear hub spacer assembly used in many of the UCE and even some later models (as an updated or common part) is frequently cited as:

• 146499/B (Supersedes the older 146499/A)

This part number is widely listed for the rear hub of UCE Classic and Bullet models.

📝 For Selling

If you are looking to sell this part, here are the key pieces of information you should highlight:

1. Genuine/OEM vs. Aftermarket: Specify if it is a Genuine Royal Enfield Part or a high-quality aftermarket replacement.
2. Part Number: Use the official RE Part Number: 146499/B.
3. Compatibility: State the models clearly: “Fits Royal Enfield UCE Models (Bullet, Classic, Electra) with Rear Drum Brake.”
4. Condition: State if the part is New/Unused or used.