RAM MOUNTS X-Grip Large Phone Mount — U-Bolt Base, Medium B-Arm, Marine-Grade Corrosion-Resistant

RAM MOUNTS X-Grip Large Phone Mount with U-Bolt Base and Medium Arm is a heavy-duty, adjustable phone cradle built to grip large phones securely on round rails while offering near-infinite positioning.

This phone mount combines RAM's spring-loaded X-grip design with a U-bolt base and a medium B-size double socket arm, creating a compact but robust system for motorcycles, boats, bicycles, and any vehicle or equipment with a .5" to 1.25" rail. Constructed from powder-coated marine-grade aluminum, stainless steel fasteners, and reinforced composite components, the kit is engineered to resist corrosion and deliver dependable holding power in wet, salty, or high-vibration settings. A tether provides extra security for rugged use, and the lifetime warranty underscores the product's durability and long-term reliability.

How does this mount keep my large phone secure during rough rides?

The X-Grip uses a spring-loaded 'X' that expands and contracts to cradle phones firmly without covering ports or screens. Rubber caps on each arm increase friction and reduce slipping, while the optional tether catches the device if it becomes dislodged. Ball-and-socket joints in the arm let you lock the phone in place once you find the ideal orientation.

• Spring-loaded X-shaped cradle conforms to large phone sizes
• Rubber-tipped arms add grip without obscuring the phone
• Optional tether for backup security in rough conditions
• Lockable ball-and-socket arm prevents unwanted rotation

Will this fit the rail on my boat or motorcycle?

The included U-bolt base is sized to clamp around round rails between .5" and 1.25" in diameter, making it compatible with most handlebars, stanchions, and railings. Stainless steel hardware and a marine-grade finish resist rust and maintain a tight fit even under constant exposure to water and salt air.

• U-bolt base fits .5"–1.25" diameter rails
• Stainless hardware resists corrosion on boats and motorcycles
• Adjustable clamping allows secure installation on varied tube sizes
• Compact footprint keeps the phone mount unobtrusive

How adjustable is the medium B-size arm for viewing angles?

The B-size double socket arm provides a medium reach with two ball joints that offer extensive articulation. You can fine-tune tilt, pan, and rotation for portrait or landscape viewing, then tighten the knobs to lock the position for a steady display while you ride or pilot.

• Double socket arm with two ball joints for near-infinite adjustability
• Medium (B) length balances reach and stability
• Knobs tighten securely to hold the chosen angle under vibration
• Simple repositioning without tools for quick angle changes

What materials and warranty back this mount's longevity?

Key structural parts use powder-coated, marine-grade aluminum and high-strength composite to resist corrosion and mechanical fatigue. Stainless steel fasteners and a durable finish extend life in harsh environments. RAM MOUNTS supports the product with a lifetime warranty, reflecting confidence in its construction and performance.

• Marine-grade aluminum resists seawater corrosion
• High-strength composite reduces weight while preserving strength
• Stainless steel hardware for rust resistance
• Lifetime warranty for long-term peace of mind

Who this is for: Riders, boaters, and outdoor professionals who need a rugged, adaptable phone mounting solution will appreciate this assembly. It's ideal for owners of larger smartphones who require secure grip, broad angle adjustment, and corrosion-resistant materials for regular exposure to water, vibration, or off-road conditions. Installers who prefer a compact system with proven RAM ball-and-socket flexibility will also find the medium arm and U-bolt base a practical, long-lasting combination.