ROCKBROS Aluminum Phone Holder | Handlebar and Stem-Cap Mounts

The ROCKBROS Bike Phone Holder gives cyclists a stable, accessible place to mount a smartphone for navigation, ride tracking, and other cycling apps. Its adjustable aluminum alloy construction supports most smartphones while keeping the screen and primary controls easy to reach.

Choose between handlebar and headset stem-cap mounting configurations to match your cockpit setup. The handlebar version supports common 22.2, 25.4, and 31.8mm bar diameters, while the headset cap version places the phone in a centered position above the stem.

Secure Four-Corner Grip

An adjustable screw mechanism closes the holder around phones measuring 2.36 to 3.54 inches wide and approximately 4.7 to 7.1 inches in overall screen size. Anti-slip cushion pads at each corner help maintain grip, reduce movement, and protect the phone from scratches.

The open design leaves space around compatible charging ports, buttons, and accessory connections. Riders can connect a charging cable or headphones without removing the phone from the holder, depending on the location of the device’s ports.

Technical Information

• Product type: Adjustable bicycle phone holder
• Material: Aluminum alloy
• Mount options: Handlebar mount or headset stem-cap mount
• Compatible phone width: 2.36 to 3.54 inches
• Compatible phone size: Approximately 4.7 to 7.1 inches
• Compatible handlebar diameters: 22.2, 25.4, and 31.8mm
• Phone retention: Adjustable screw mechanism
• Phone protection: Four anti-slip cushion pads
• Access: Open slots for compatible buttons, charging ports, and accessories
• Material benefits: Lightweight, durable, rust-resistant, and corrosion-resistant

Fitment

• Fits bicycles with compatible 22.2, 25.4, or 31.8mm handlebars when using the handlebar version
• Fits compatible bicycle headset and stem-cap assemblies when using the headset cap version
• Accommodates most smartphones within the stated width and size ranges
• Confirm your phone dimensions and selected mounting location before ordering

Why It Stands Out

The aluminum alloy body offers a more rigid mounting platform than a basic plastic holder, while the screw adjustment creates a controlled fit around the phone. Multiple mounting options, anti-slip corner pads, and unobstructed port access make it a practical setup for commuting, road cycling, and longer recreational rides.

Set the viewing angle and start navigation or recording before moving. Avoid adjusting or operating the phone while riding.

Best For

• Commuters using turn-by-turn navigation or cycling apps
• Road and fitness riders monitoring routes and ride data
• Cyclists who want a choice between handlebar and centered stem-cap mounting