RAM MOUNTS RAM-B-231Z-2U Base with U-Bolt & UTV Strap - Black

Out on the trail, your phone or GPS needs to stay put. The RAM-B-231Z-2U base gives you a rock-solid anchor on round or square rails, bars, and tubes. Built from marine-grade aluminum and a high-strength composite, this black base shrugs off vibrations, weather, and spray. Use the included U-bolts for diameters from 0.5 to 1.25 inches, or strap it onto larger structures from 1.5 to 3 inches. It's the foundation for any RAM B-size arm and cradle—on motorcycles, ATVs, UTVs, boats, or wheelchairs.

Key specifications

• Ball size: B (1 inch / 25.4 mm)
• U-bolt range: 0.5 - 1.25 inches (12.7 - 31.75 mm)
• Strap range: 1.5 - 3 inches (38.1 - 76.2 mm)
• Material: Marine-grade aluminum and high-strength composite
• Colour: Black
• Installation: Clamp-on (U-bolt) or strap-on
• Includes: two 0.5"-1" U-bolts, two 1"-1.25" U-bolts, rubber caps, and one UTV strap
• Made in the USA

Why choose it

RAM Mounts is the industry standard for demanding environments. This base combines a traditional U-bolt mount with a versatile UTV strap, giving you two mounting options in one package. Marine-grade aluminum resists corrosion, and the high-strength composite ball is built to last. The B-size ball works with a huge range of RAM arms and holders, so you can customize your setup for any device.

Ideal use cases

• Motorcycles and scooters
• ATVs and UTVs
• Boats and watercraft
• Wheelchairs and mobility aids
• Bicycles and kayaks

Good to know

Backed by a lifetime warranty, this base is made in the USA and supports up to 2 lbs (0.9 kg) for B-size components. It fits round or square rails, bars, and tubes, making it a versatile choice for any adventure.