RAM MOUNTS X-Grip Large Phone Mount for Round Rails – U-Bolt Base .5"–1.25", Medium Arm, Marine-Grade

The RAM MOUNTS X-Grip Large Phone Mount with U-Bolt Base and Medium Arm secures large smartphones to round rails with rugged adjustability and marine-grade hardware.

This heavy-duty mount combines a spring-loaded X-Grip cradle, a U-bolt base sized for .5"–1.25" rails, and a medium-length double-socket arm to give you a reliable, adjustable phone mounting solution for bikes, boats, ATVs, and utility vehicles. Built from powder-coated aluminum, stainless steel, and high-strength composite, it resists corrosion and vibration while letting you position your phone almost anywhere within reach.

How does the X-Grip keep my large phone safe during rough rides?

The X-Grip uses a spring-loaded rubber-tipped "X" frame that clamps around the device corners, preserving screen visibility while providing strong retention. An optional tether adds extra redundancy for very rough conditions.

• Spring-loaded X-brackets hold phones securely without covering the screen
• Rubber caps protect device edges and increase friction
• Optional tether attaches to phone to prevent drops during extreme use

Will this mount fit my vehicle’s rail or handlebar?

The included U-bolt base fits round tubes from 0.5" to 1.25" in diameter, making it compatible with most bicycle handlebars, roll cages, railings, and marine rails. The medium (B-size) double-socket arm gives a balance of reach and stability.

• U-bolt accepts rails .5"–1.25" diameter for broad compatibility
• Medium-length B arm offers versatile reach without excess flex
• Ball-and-socket joints provide near-infinite adjustability for angle and orientation

Is the build quality up to marine and off-road conditions?

Materials and finishes are selected to withstand harsh environments: powder-coated marine-grade aluminum resists corrosion, stainless steel fasteners endure salt and moisture, and reinforced composite components absorb shocks and vibration.

• Powder-coated marine-grade aluminum for corrosion resistance
• Stainless steel hardware resists rust in wet conditions
• High-strength composite components for impact and vibration durability

How adjustable and user-friendly is the mounting system?

Ball-and-socket technology lets you tilt, pan, and rotate the phone to any useful viewing angle, and the spring-action X-Grip makes one-handed insertion and removal quick and reliable. Setup and tightening require standard hand tools.

• Ball-and-socket joints permit fine angle adjustments and locking at any position
• Spring-loaded cradle enables fast, one-handed device placement and removal
• Simple hardware tightening secures the base and arm without specialty tools

Who is this for: Riders, boaters, and outdoor professionals who need a dependable, corrosion-resistant phone mounting system for large smartphones will appreciate this combination of strong retention, flexible positioning, and rugged construction. If you frequently mount your phone on handlebars, rails, or roll cages and want a durable setup that keeps screens visible and secure in demanding environments, this RAM MOUNTS assembly is designed for that use.