Product Description
Fits: Nasci 5000XGFB, Sahara C5000XGFI, Ultegra C5000X, Spheros 3000XGSW 4000XGSW C3000HGSW.
The Rugged Inshore Upgrade: Smoothdrag Carbontex Drag Kit (Shimano #16742 x 3)
The Shimano #16742 x 3 Kit is the essential performance "triple-stack" for Shimano’s most popular mid-sized power spinning reels. Covering the high-torque Nasci, Sahara, and Ultegra C5000 sizes, as well as the saltwater-specific Spheros SW, this kit replaces the original factory felt or basic composite washers. In these 3000 to 5000 frames—often used for heavy inshore Snook, Tarpon, or big-water Salmon—factory washers can become "mushy" or develop stiction (stick-slip) under the high-pressure loads of a long fight.
By upgrading to high-density, cross-weave Carbontex, you achieve zero start-up inertia. This ensures that even when your drag is cinched down to stop a fish from reaching a dock piling or a reef, the line releases with buttery smoothness, protecting your knots and modern braided lines.
Why Upgrade Your Mid-Frame Shimano Spinner?
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Eliminate "Shock-Snaps": When using zero-stretch braid, any hesitation in the drag can lead to a snapped leader. Carbontex removes the jerky "catch" common in seasoned factory stacks, providing an instant, linear release.
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Massive Heat Dissipation: Fighting high-speed species like Bonefish or schoolie Pelagics on a 3000/4000 frame generates intense internal heat. Carbon fiber handles these thermal loads flawlessly, preventing drag "fade" mid-fight.
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Saltwater & Moisture Resilience: For Spheros SW and Nasci FB users, Carbontex is a necessity. It is virtually impervious to moisture and won't rot or swell like felt, maintaining a firm, consistent lockdown feel trip after trip.
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The "Triple Stack" Advantage: These specific models utilize a three-washer configuration to maximize surface area and stopping power. Carbontex provides the non-compressible surface required to maintain that power without losing the ability to make fine adjustments.
Comprehensive Fitment & Compatibility
This kit is precision-lapped to fit the internal spool cavities of Shimano’s mid-sized "Power" spinning platforms.
| Series | Compatible Models | Primary Application |
| Nasci | 5000XGFB | Rugged Multi-Species / Heavy Freshwater |
| Sahara | C5000XGFI | Value-Performance Inshore |
| Ultegra | C5000X | High-Speed Shore Casting / Surf |
| Spheros SW | 3000XGSW, 4000XGSW, C3000HGSW | Dedicated Light Saltwater / Technical Inshore |
Technical Note: The "C" in models like C5000 stands for "Compact Body," meaning these reels utilize a 5000-sized spool on a 4000-sized body. This kit is sized specifically for the high-capacity spool diameters of these models.
Professional Installation & Lubrication Protocol
For mid-to-large spinning reels used in harsh environments, a "wet drag" setup is the professional standard for maximum smoothness:
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Cal’s Universal Drag Grease: Apply an ultra-thin, translucent coating of Cal’s Grease (Tan) to both sides of each Carbontex washer. The washers should only look "wet"; excess grease can migrate and reduce your maximum drag pressure.
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Metal Washer Restoration: Check your stainless steel drive washers (the metal plates between the carbon). Polish away any "glassy" buildup or salt pitting with 0000 grade steel wool until they have a mirror finish.
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Spool Shaft Maintenance: While the spool is off, apply a single drop of Deuthlon High-Speed Reel Oil to the main shaft. This ensures the oscillation remains silent and effortless under the high torque of a big fight.
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Drag Knob Seal: Check the rubber gasket on the bottom of the drag knob. Ensure it is clean and lightly oiled to keep saltwater and sand out of your new precision drag stack.
SEO & Technical Summary
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Product Type: Premium Carbon Fiber Drag Washer Upgrade
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Brand: Smoothdrag (Carbontex)
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Kit ID: Shimano Part #16742 (3 Washer Set)
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Application: Inshore Saltwater / Heavy Freshwater / Multi-Species
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Key Benefits: Zero-stiction start-up, high heat tolerance, and saltwater immunity.

