When it comes to high-performance spinning reels, ergonomics and aesthetics go hand-in-hand. Upgrading your Shimano Twin Power SW Power Knob with the Gomexus Aluminum Power Knob B45 is one of the easiest ways to get extra cranking leverage and custom style for saltwater fishing.
Why Upgrade Your Shimano Twin Power SW Power Knob?
The Shimano Twin Power SW is built for demanding saltwater encounters. While the stock factory knob is performance-driven, swapping it for a CNC-machined Gomexus B45 aluminum power knob offers distinct advantages:
- Enhanced Cranking Torque: The 45mm round power knob provides a superior palm grip for battling heavy offshore species like tuna and snapper.
- Corrosion-Resistant Durability: Forged from lightweight 6061 aluminum with an anodized finish to withstand harsh marine environments.
- Custom Aesthetics: Drilled aluminum design that seamlessly matches the sleek color scheme of the Shimano Twin Power SW series.

Step-by-Step Installation: How to Replace the Handle Knob
Upgrading your Shimano Twin Power SW Power Knob to the Gomexus B45 is a quick 5-minute DIY process. Follow this step-by-step guide below:
🔧 Required Tools:
- Small Phillips screwdriver
- Small flathead screwdriver (or cap removal tool)
- Reel oil / bearing grease (optional)
Gently pry off or unscrew the stock handle cap using a small flathead screwdriver.

Use a Phillips screwdriver to loosen and remove the center screw holding the factory knob.

Remove the stock knob and slide out the original stainless steel bearings from the shaft.

Unscrew the aluminum cap from your new Gomexus B45 power knob.

Insert the two bearings into the B45 knob and slide the assembly onto the Twin Power handle shaft.

Fasten the center screw firmly to secure the knob in place, ensuring smooth rotation.

Screw the Gomexus aluminum end cap back on to finish the upgrade.

💡 Pro Installation Tips:
- Adjust Play with Washers: Test the knob rotation after tightening. If there is noticeable side-to-side wobble, add one of the included copper washers to eliminate play.
- Lubricate Bearings: Add a drop of high-speed reel oil to the bearings during assembly for maximum spin smoothness and corrosion defense.
Shimano Twin Power SW Power Knob Size Compatibility (4000 to 14000)
The Gomexus B45 power knob is engineered to fit a wide range of Shimano spinning reels equipped with Type B handle shafts. Whether you are running a smaller Shimano Twin Power SW 4000 / 5000 / 6000 for inshore jigging or heavy-duty Twin Power SW 8000 / 10000 / 14000 models for offshore popping, installing a Shimano Twin Power SW Power Knob upgrade like the B45 delivers zero-wobble direct fit performance. Replacing your stock handle with a larger 45mm round knob provides better hand clearance and reduces finger strain during long battles with trophy fish.
Final Thoughts: Elevate Your Saltwater Game
Upgrading your Shimano Twin Power SW Power Knob with a Gomexus B45 Power Knob is a quick, high-reward modification that transforms both the feel and performance of your reel. Whether jigging for amberjacks or casting to popping tuna, the extra comfort and winching power make every fight more controlled. Give your gear the tournament-ready finish it deserves!