RAM Mounts Torque Medium Rail Base for 19.1–25.4 mm Rails, B-Size (RAM-B-408-75-1U)

RAM Mounts Torque Medium Rail Base (RAM-B-408-75-1U) is a low-profile collar clamp for round rails 19.1–25.4 mm (0.75"–1") in diameter – ideal for motorcycle, bicycle and ATV handlebars and boat rails. Composite sizing inserts give a snug fit and protect the surface, and nylon-insert lock nuts keep the clamp tight in high-vibration environments. The 1" B-size ball connects to any B-size double socket arm and holder.

Key Features

• Torque collar clamp – low-profile clamp for round rails Ø 19.1–25.4 mm (0.75"–1")
• Sizing inserts – snug fit on different diameters and protection for the mounting surface
• Vibration-proof – nylon-insert lock nuts prevent loosening
• B-size 1" ball – connects to any RAM B-size double socket arm for near-infinite adjustment
• Load rating – up to 2 lb (0.9 kg) in standard use and 1 lb (0.45 kg) in heavy-duty use; ideal for phones, GPS units, scanners and small tablets
• Built for harsh conditions – powder-coated marine-grade aluminium, backed by RAM's lifetime warranty

Compatibility

• Round rails, handlebars and tubes Ø 19.1–25.4 mm (0.75"–1")
• All RAM B-size (1") double socket arms and ball components

Technical Specifications

You will find matching cradles, holders and more RAM mounting parts in our Mobile Terminal Accessories collection. Planning a vehicle or forklift installation, or ordering for a whole fleet? Contact us for project support and volume pricing.