RAM Mounts RAM-B-149ZU-A U-Bolt Mount Short – B Size Ball, Fits 0.5–1.25 in. Rails, Black

Marine-grade aluminum and zinc-coated steel combine in the RAM-B-149ZU-A to deliver a corrosion-resistant, vibration-dampening base for rails and bars from 0.5 to 1.25 inches in diameter. The included B-size rubber ball (1 inch) provides a solid connection point for all RAM B-size arms and device holders, making it ideal for motorcycles, ATVs, boats, bicycles, and wheelchairs.

Overview

The RAM-B-149ZU-A U-Bolt Mount Short is engineered for a secure, vibration-dampening attachment to round or square rails and bars. Its marine-grade aluminum base is powder-coated for added protection, while the zinc-coated steel U-bolt with a composite adapter ensures a versatile and reliable fit. The included B-size rubber ball (1 inch / 25.4 mm) provides a solid connection point for all RAM B-size arms and device holders, making it ideal for motorcycles, ATVs, boats, bicycles, and wheelchairs.

What stands out

• Secure clamp-on design fits rails and bars from 0.5 to 1.25 inch (12.7–31.75 mm) diameter
• Marine-grade aluminum base with powder-coated finish resists corrosion
• Zinc-coated steel U-bolt with composite adapter for durability and flexibility
• Rubber B-size ball provides a tight, vibration-dampening grip
• All necessary hardware included: U-bolt, adapter, nuts, and rubber caps
• Compatible with all RAM B-size arms and device holders

Technical details

• Mounting Type: U-Bolt Base
• Ball Size: B Size (1 inch / 25.4 mm)
• Compatible Rail/Bar Diameter: 0.5 – 1.25 inch (12.7 – 31.75 mm)
• Base Material: Marine-grade aluminum, powder-coated
• U-Bolt Material: Zinc-coated steel
• Ball Material: Rubber
• Included Hardware: (1) U-Bolt, (1) Composite Adapter, (2) Nuts, (2) Rubber Caps
• Typical Application: Motorcycles, bicycles, ATVs, boats, wheelchairs, etc.
• Mounting Surface Shape: Round or square rails/bars
• Corrosion Resistance: Yes
• Color: Black
• Compatibility: All RAM B Size arms and device holders
• U-Bolt Inner Width (Approx.): 1.25 inches (31.75 mm)
• U-Bolt Leg Length (Approx.): 2.5 inches (63.5 mm)
• Ball Type: Rubber coated
• Product Series: RAM B Size Components
• Installation: Secure clamp-on design
• System Ball Size Load Rating (Approx.): Up to 2 lbs (0.9 kg)
• Finish: Powder-coated (aluminum base)

Our verdict

The RAM-B-149ZU-A U-Bolt Mount Short is a robust and versatile mounting solution for any environment where rails or bars are present. Its marine-grade construction and vibration-dampening ball ensure your device stays secure, making it a top choice for powersports and mobility applications.