Product Description

SHIMANO 103MU SPOOL SUPPORT A (RD14832)

Stabilize Your Drag System

The Shimano 103MU Spool Support A is a genuine OEM replacement component found on the main shaft of many modern Shimano spinning reels. Sitting directly under the spool, this plastic support ring works in conjunction with Spool Support B to provide a stable platform for the spool to rotate on. It is also integral to the "clicker" mechanism on some models, ensuring the spool remains level during drag engagement.

If this support becomes cracked or worn, you may notice excessive wobble in your spool, uneven line lay, or inconsistent drag pressure. Replacing it with this original Shimano part ensures your reel maintains the tight tolerances required for smooth performance.

Product Specifications

• Part Name: Spool Support A

• Manufacturer: Shimano

• Part Number (MPN): 103MU

• Alternate Part Number: RD14832

• Material: Durable Plastic / Composite

• Installation Position: Main Shaft Assembly (Under the Spool)

Compatible Models

This part fits a wide variety of Shimano spinning reels, particularly those in the P4 and mid-range categories from 2016 onwards.

• Shimano Ultegra Series:

  • 17 Ultegra (2500, C3000, 4000, C5000)

  • 21 Ultegra (1000, 2500, C3000, 4000, C5000)

• Shimano Nasci Series:

  • 16 Nasci FB (All Sizes)

  • 21 Nasci FC (All Sizes)

• Shimano Catana Series:

  • Catana FD (All Sizes)

  • Catana FE (C3000HG FE, etc.)

• Shimano FX Series:

  • FX FC (1000FC, 2000FC, 2500HGFC, 4000FC)

• Shimano Sienna Series:

  • Sienna FG (Select models, check schematic)

Installation & Reference

To ensure this is the correct part for your reel, please cross-reference the part number 103MU or RD14832 with your reel's exploded diagram.

• Schematic Diagrams: For detailed PDF schematics and part location verification, please visit www.reelschematic.com.

• Alternate Part Number: RD14832

Installation Tip: This part is often paired with Spool Support B (Part No. 10J04). When installing, ensure the flat sides of the main shaft align with the corresponding keyway in the Spool Support A to prevent it from spinning freely on the shaft.