RAM MOUNTS X-Grip Large Phone Mount with U-Bolt Base & Medium Arm — Marine‑Grade Rail/Handlebar Mount

The RAM MOUNTS X-Grip Large Phone Mount with U-Bolt Base and Medium Arm securely holds large smartphones to rails, handlebars, or tubing while offering wide-range adjustability and marine-grade resilience.

If you need a rugged phone mounting solution for a motorcycle, bicycle, kayak, or boat rail, this kit combines the proven X-Grip spring-loaded cradle with a U-bolt base and a medium-length double-socket arm. The setup keeps your device visible and accessible without obscuring the screen, and the materials and construction are chosen to resist corrosion and vibration in demanding outdoor environments.

How does the X-Grip keep larger phones stable in bumpy conditions?

The X-Grip uses a spring-loaded X-shaped cradle that contacts the phone at four points without covering the screen or blocking ports. Rubber end caps increase friction and protect the phone's edges, while an optional tether adds fail-safe security for extreme conditions.

• Four-point spring pressure avoids slippage during impacts
• Rubber cap pads prevent scratches and improve grip
• Optional device tether secures phones during heavy vibration or rough rides
• Design fits oversized phones and most protective cases

What mounting surfaces does the U-bolt base support?

The included U-bolt base attaches to round tubing and rails with diameters from 0.5 inches up to 1.25 inches, making it compatible with many handlebars, roll bars, and lifelines. The base hardware clamps tightly and resists loosening from vibration when properly torqued.

• Fits rails & tubes Ø 0.5"–1.25" (12.7–31.8 mm)
• Stainless steel U-bolt hardware for corrosion resistance
• Secure clamping design for motorcycles, ATVs, bicycles, and boats
• Easy to install with common hand tools

Why choose the medium B-size double-socket arm for adjustment?

The medium-length B-size RAM double-socket arm provides a balance of reach and stiffness, allowing you to position the phone for optimal viewing while remaining resistant to flex. Its ball-and-socket joints offer near-infinite angle adjustments and lock down firmly with a single central nut.

• Medium reach keeps the phone within easy view and reach
• Ball-and-socket joints allow fine rotational and tilt adjustments
• Single tightening point secures the entire assembly quickly
• Durable composite sockets and powder-coated aluminum arm resist wear

How durable is this mount in marine and off-road environments?

Components use powder-coated, marine-grade aluminum, stainless steel hardware, and high-strength composite materials to withstand salt spray, sun exposure, and frequent vibrations. RAM MOUNTS backs the product with a lifetime warranty, reflecting confidence in long-term performance.

• Marine-grade aluminum resists corrosion and fading
• Stainless steel fasteners prevent rust and galling
• High-strength composite joints tolerate repeated adjustments
• Lifetime warranty supports durability expectations

Who is this for? If you ride, sail, paddle, or work with outdoor gear and need a dependable way to keep a large smartphone visible and secure, this X-Grip kit is built for you. It suits riders who want unobstructed screen access, boaters needing corrosion-resistant hardware, and anyone who prefers a versatile clamp-on mount that adjusts quickly and holds tight through rough terrain or chop.