Product Description
Shimano 10C13 Drag Washer B (RD9911)
The Shimano 10C13 Drag Washer B (RD9911) is a high-performance friction disc essential for the smooth and consistent drag operation of your Shimano spinning reels. As part of a multi-washer stack located within the spool, "Washer B" works in conjunction with metal keyed washers and other friction discs to provide the stopping power needed to tire out hard-fighting fish.
Constructed from a specialized felt or carbon-fiber composite (depending on the specific reel generation), this washer is designed to provide a steady "startup" without the jerking or "stuttering" often found in inferior aftermarket parts. If your drag feels inconsistent, sticky, or loses pressure during a long run, it is likely that your drag washers have become compressed, glazed, or contaminated with salt and sand.
Product Specifications
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Part Name: Drag Washer (B)
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Part Number: 10C13
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Shimano Code: RD9911
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Material: High-Density Friction Composite
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Location: Internal Spool Drag Stack
Alternate Part Numbers
This part is frequently cross-referenced or identified by the following Shimano identification numbers:
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RD9911
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RD13166 (Note: Always verify thickness and diameter in your specific schematic)
Compatibility & Fitment
The 10C13 (RD9911) is a widely utilized component across several of Shimano’s most popular spinning reel series. It is a direct factory fit for the following models:
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Shimano Stradic Series: ST-1000FJ, ST-2500FJ, ST-3000FJ, ST-4000FJ, ST-5000FJ
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Shimano Sustain Series: SA-1000FG, SA-2500FG, SA-3000FG, SA-4000FG, SA-5000FG
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Shimano Saros Series: SAR-1000FA, SAR-2500FA, SAR-3000FA, SAR-4000FA
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Shimano Rarenium / Complex Series: Select CI4+ models (Check specific RD code)
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Shimano Biomaster Series: Fits various 1000–5000 sizes (Verify via schematic)
Key Features
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Heat Resistance: Formulated to maintain its friction coefficient even during high-speed runs that generate significant heat.
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Consistent Pressure: Precision-cut thickness ensures even pressure across the entire surface of the drag stack.
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Saltwater Durability: Engineered to resist swelling or degradation when exposed to moisture.
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OEM Performance: Guaranteed to restore the factory-spec drag rating (lbs/kg) of your specific reel.
Pro Tip: When installing new drag washers, many Shimano models require a light coating of Shimano Drag Grease (Permalub or Ace-0). Applying too much or using the wrong type of grease can cause the drag to slip. For the exact assembly sequence and lubrication requirements for your spool, consult the PDF schematics at www.reelschematic.com.
