RAM MOUNTS Motorcycle Fork Stem Mount for 12–38mm Fork Tubes — 1" B-Size Ball, Marine-Grade Aluminum

This compact fork stem mount is built to anchor cameras, GPS units, phones, lights and other accessories directly to the cylindrical bore of motorcycle fork stems. Constructed from powder-coated marine-grade aluminum and supplied with a 1" B-size RAM rubber ball, the mount combines corrosion resistance with the familiar ball-and-socket system for virtually unlimited positioning. Backed by RAM MOUNTS' lifetime warranty, it is engineered for demanding road and weather conditions.

How does this mount attach to fork stems?

The mount slides into the cylindrical bore of the fork stem and secures inside the tube wall for a firm connection without external clamps. The included rubber ball installs on the mount, allowing attachment to any B-size RAM double-socket arm for flexible orientation.

• Fits fork tube diameters from 12mm to 38mm
• Installs into the bore wall for a low-profile look
• Uses a 1" B-size RAM rubber ball for standard compatibility
• No bulky external brackets required

Will this hold my camera or phone securely while riding?

Yes — the combination of marine-grade aluminum construction and the RAM ball-and-socket interface provides a rigid, vibration-resistant connection when tightened properly. For the best results, pair the fork stem mount with an appropriate double socket arm and a device-specific holder that locks the device in place.

• Durable powder-coated body resists corrosion and wear
• Ball-and-socket design allows fine-tuned aiming and locking
• Works with RAM double-socket arms and device cradles
• Recommended to use thread-lock or torque specs for high-vibration bikes

What are the materials and weather resistance features?

The mount is machined from marine-grade aluminum and finished with a tough powder coat to protect against salt, rain and road grime. Those materials help ensure long-term performance in coastal or wet environments without sacrificing strength.

• Marine-grade aluminum resists corrosion
• Powder-coated finish prevents chipping and oxidation
• Rubber ball provides shock isolation
• Lifetime warranty covers material and workmanship defects

How adjustable is the mounting angle and positioning?

Adjustability is virtually unlimited when used with RAM B-size arms: the 1" rubber ball allows multi-axis rotation and tilt before final locking. Riders can quickly fine-tune camera angles, GPS sightlines or light direction to suit ergonomics and road conditions.

• 1" B-size ball supports multi-axis articulation
• Compatible with a variety of RAM arms and cradles
• Rotate, tilt and swivel to set precise aim
• Locks solid once fastened to eliminate drift

Who is this for: Motorcycle riders, tourers and commuters who want a low-profile, robust mounting point for electronics and accessories on the fork stem. It’s well-suited to photographers, vloggers, GPS users and anyone needing a reliable mounting solution that withstands weather and vibration while offering fast adjustability via the RAM ball-and-socket system.