Eisbach Riders Flexible SUP River Fin (US box)

If you paddle rivers, shallow waterways, or rocky environments, the Eisbach Riders Flexible SUP River Fin (US Fin Box) is designed to handle the challenge. Built specifically for boards with a US fin box system, this compact 4.7” paddle board fin offers excellent stability and tracking while remaining flexible enough to cope with rocks and shallow riverbeds.

The flexible construction helps absorb impacts, reducing the risk of damaging your fin when exploring low-depth environments. Whether you’re touring down a flowing river, paddling estuaries, or navigating shallow coastal areas, this river SUP fin provides reliable control and durability.

It’s an ideal paddle board replacement fin for adventurous paddlers who want performance without worrying about damaging their equipment in shallow water.

Built for Rivers & Shallow Water

Traditional rigid fins can easily snag or break when paddling over rocks or gravel beds. The flexible design of the Eisbach Riders River Fin helps protect both your fin and your board by bending slightly when it encounters obstacles.

The shorter 4.7-inch fin size also reduces how deep the fin sits in the water, making it perfect for:

• River paddleboarding
• Shallow lakes and waterways
• Rocky riverbeds and gravel sections
• Paddle board touring routes
• Coastal paddling with changing water depths

Despite its compact size, it still delivers solid tracking, stability, and control for confident paddling.

Compatible With US Fin Box Paddle Boards

This fin is designed for the standard US fin box system, the most widely used centre fin setup on inflatable and hard paddle boards.

It works with boards from many popular brands including:

• Red Paddle Co
• Fanatic
• JP Australia
• Starboard (most models)
• If your board uses a US-Box center fin with screw and plate, this fin is a reliable and easy replacement.

Please check your board specification to ensure it uses a US fin box to confirm compatability.

Key Features

• 4.7” flexible SUP river fin for shallow water paddling
• US-Box centre fin system (screw and plate installation)
• Flexible construction helps absorb impacts with rocks
• Single replacement paddle board fin
• Ideal for river SUP, touring, and shallow water paddling

Why Choose Eisbach Riders Fins?

Eisbach Riders fins combine precision engineering with environmentally responsible design.

• Made in Germany – high-quality engineering and craftsmanship
• Durable & high-performance – built for rivers, lakes and touring adventures
• Eco-friendly materials – crafted from recycled materials
• SUP Funk Approved – Our fin of choice when tackling British rivers and shallow waters

For paddlers who love exploring rivers and shallow waters, the Eisbach Riders Flexible SUP River Fin (US Box) offers a durable, sustainable and performance focused solution for your paddle board setup.