RAM MOUNTS RAM-B-149Z-347U U-Bolt Mount with 1-Inch Ball Base for Rails and Handlebars

Securing a device to a round rail, handlebar, or pipe can be a frustrating challenge—many mounts slip, corrode, or require permanent modifications. The RAM-B-149Z-347U U-Bolt Mount solves this by providing a rock-solid, corrosion-resistant foundation for your RAM B-size mounting system. Its stainless steel U-bolt clamps tightly around bars from 0.625" to 1.25" in diameter, while the marine-grade aluminum base offers a 1-inch rubber ball for attaching any RAM B-size arm or device holder. Whether you're on a motorcycle, ATV, boat, or wheelchair, this mount keeps your gear stable and accessible.

Who is it for

This mount is ideal for motorcyclists, cyclists, ATV riders, boaters, and anyone who needs a secure mounting point on a round or square bar. It's also a great solution for wheelchair users, industrial settings, or any application where a durable, vibration-resistant base is required. If you already own RAM B-size components, this base integrates seamlessly.

Main features

• Stainless steel U-bolt fits rails, handlebars, and pipes from 0.625" to 1.25" (15.88mm to 31.75mm) in diameter
• Marine-grade aluminum base with 1-inch (B size) rubber ball for attaching RAM arms and holders
• Composite spacer and rubber caps protect the mounting surface and ensure a firm grip
• Corrosion-resistant materials for long-lasting performance in marine and outdoor environments
• Supports up to 2 lbs (0.9 kg) for light-duty devices such as phones, GPS units, and action cameras
• Backed by RAM Mounts lifetime warranty

Specifications

• Mounting Type: U-Bolt Base
• Ball Size: 1 inch (B Size)
• Material (Base): Marine-grade Aluminum
• Material (U-Bolt): Stainless Steel
• Material (Spacer/Caps): High Strength Composite / Rubber
• Compatibility: RAM Mounts B-size components
• U-Bolt Diameter Range: 0.625" to 1.25" (15.88mm to 31.75mm)
• Mounting Surface: Handlebars, Rails, Pipes, Round or Square Bars
• Included Hardware: U-bolt, 2x Rubber Caps, Composite Spacer
• Application: Motorcycles, Bicycles, ATVs, Boats, Wheelchairs, etc.
• Corrosion Resistance: Yes (Marine-grade aluminum, stainless steel)
• Color: Black
• Weight Capacity: Up to 2 lbs (0.9 kg) for light-duty applications
• Overall Height (Base): 3.5 inches (88.9 mm)
• Overall Width (Base): 2.5 inches (63.5 mm)
• Overall Depth (Base): 1.25 inches (31.8 mm)
• Warranty: Lifetime Warranty (RAM Mounts)

Tips

For optimal stability, position the U-bolt on the straightest section of your bar and tighten evenly. Use the included rubber caps to prevent scratching and reduce vibration. Pair with any RAM B-size arm and device holder to complete your custom mounting solution.