Introduction
Thank you for choosing the GOMEXUS 38mm Aluminum Power Knob. This instruction manual provides essential information for the proper setup, operation, and maintenance of your new fishing reel accessory. Designed for durability and enhanced performance, this power knob will improve your fishing experience.
The round, one-piece design of the Gomexus power knob provides a large contact area with your palm, enhancing power during fights with fish such as bass, musky, catfish, striper, snapper, and tuna. This design minimizes fatigue even after extended use.
Gomexus custom power knobs are cold-forged from a single piece of aerospace-grade aluminum, offering superior durability compared to EVA or rubber knobs, and lighter weight than stainless steel knobs. Weighing approximately 26.6g, the Gomexus power knob ensures a longer lifespan, saving costs and improving your fishing enjoyment.
Gomexus knobs are available in various stylish colors, allowing easy matching with different fishing reel brands like Shimano (Nexave, Sienna, Catana, Syncopate FG, FX), Daiwa (BG, Revros, Crossfire, Sweepfire, Tournament SS), Penn (Battle II, Spinfisher, Pursuit, Fierce), Abu Garcia, Okuma, Quantum, and Pflueger.
1. Setup and Installation
Follow these instructions for proper installation of your Gomexus power knob. The knob is equipped with 2 stainless steel bearings for smoother rotation. An aluminum bushing is provided for Daiwa reel handles, and 3 washers ensure a perfect fit. Note: The knob does not come with a shaft.

Figure 1: Installation diagram for Shimano and Daiwa reel handles. This diagram illustrates the components and steps for installing the power knob. For Shimano handles, the shaft, washer, bearing 1, body, bearing 2, screw, and cap are shown. For Daiwa handles, an additional bushing is used between the shaft and washer.
Shimano Handle Installation:
- Remove the existing knob and components from the reel shaft.
- Place the first bearing (bearing 1) onto the shaft.
- Slide the knob body onto the shaft.
- Place the second bearing (bearing 2) into the knob body.
- Secure the cap with the screw.
- Use the provided washers as needed to ensure a snug fit and smooth rotation.
Daiwa Handle Installation:
- Remove the existing knob and components from the reel shaft.
- Place the aluminum bushing onto the shaft.
- Place the washer onto the shaft, followed by the first bearing (bearing 1).
- Slide the knob body onto the shaft.
- Place the second bearing (bearing 2) into the knob body.
- Secure the cap with the screw.
- Use the provided washers as needed to ensure a snug fit and smooth rotation.

Figure 2: Fitment Information. This chart lists direct fitment models for Shimano (Vanford, Stradic Ci4) and Daiwa (Fuego LT, Kage MQ LT, Ballistic LT) handles. It also indicates drill fitment for spinning reels like Daiwa BG, Penn Battle, Penn Spinfisher, and Penn Fierce. For other models, contact Gomexus support.
2. Operating Your Gomexus Power Knob
The Gomexus power knob is designed for enhanced control and comfort during fishing. Its ergonomic, round shape provides a secure grip, allowing for more efficient reeling and powerful retrieves, especially when battling larger fish. The smooth rotation provided by the stainless steel bearings ensures effortless operation.
To operate, simply grasp the knob firmly and turn the reel handle as you normally would. The increased surface area and comfortable design will reduce hand fatigue and provide a more direct connection to your retrieve, improving your ability to feel subtle bites and control powerful fish.
3. Maintenance and Care
To ensure the longevity and optimal performance of your Gomexus power knob, follow these maintenance guidelines:
- Cleaning: After each fishing trip, clean the knob thoroughly. The teardrop hole design facilitates easy rinsing to remove salt, dirt, and fish residue.
- Washing: Use fresh water and a mild soap solution for cleaning. Avoid harsh chemicals that could damage the aluminum finish.
- Drying: Rinse thoroughly and dry completely before storage to prevent corrosion.
- Inspection: Periodically check the screws and connections to ensure they are secure. Tighten gently if any looseness is detected.
- Lubrication: Lubricate the bearings annually or as needed with a light reel oil to maintain smooth rotation.
The excellent teardrop hole design of the Gomexus power knob makes it easy to clean after each fishing trip, which is less likely to leave fish odor, thereby extending the lifespan of your fishing reel handle knob.
4. Troubleshooting
If you encounter any issues with your Gomexus power knob, refer to the following common solutions:
- Knob feels stiff or rough: Ensure all components are clean and free of debris. Check if the bearings are properly seated and lubricated. Adjust the number of washers to prevent overtightening or excessive play.
- Knob has excessive play: Verify that all screws are tightened securely. Add or adjust washers to eliminate any looseness between the knob and the reel handle shaft.
- Knob makes noise: Clean and lubricate the bearings. Check for any foreign objects lodged within the knob mechanism.
If problems persist after attempting these solutions, please contact Gomexus customer support for further assistance.
5. Product Specifications

Figure 3: A38 Knob Specification. This image displays a table detailing the diameter, weight, and length for 35mm, 38mm, and 41mm versions of the Gomexus A38 power knob. A diagram illustrating how diameter and length are measured is also included.
| Model | A38 |
| Diameter | 38mm |
| Weight | 26.6g (0.94oz) |
| Length | 49mm |
| Material | Aerospace-grade Aluminum |
| Color | Silver-Gold |
| Bearings | 2 Stainless Steel Bearings |
| Compatibility | Shimano & Daiwa Spinning Reels (see Fitment Information for specific models) |
6. Warranty Information
Specific warranty details for the Gomexus Power Knob are not provided in the product information. Please refer to the manufacturer's official website or contact Gomexus customer support for current warranty terms and conditions.
7. Customer Support
For further assistance, technical support, or inquiries regarding your Gomexus Power Knob, please visit the official Gomexus website or contact their customer service department. Contact information may also be available on your product packaging.
You can also visit the Gomexus Store on Amazon for more product information and support:





