Edelrid OHM II Assisted-Braking Resistor

The Edelrid OHM II is an assisted-braking resistor designed for climbing partners with a significant weight difference. Attached to the first bolt, it increases friction during a fall to reduce the force placed on a lighter belayer and help prevent them being pulled upwards or into the wall.

The second-generation design features a swivel joint for easier clipping in either direction and an improved locking system for simple rope installation. It doesn’t create additional friction while paying out rope, but activates progressively during a fall and also provides greater control when lowering a heavier climber.

Key Features & Benefits

• Supports unevenly weighted climbing pairs – Effectively makes the lead climber feel approximately 25kg lighter during a fall.

• Reduced force on the belayer – Helps prevent a lighter belayer being pulled upwards or into the wall.

• Progressive braking action – Adds friction smoothly rather than stopping the rope abruptly.

• Improved swivel joint – Allows the OHM II to be clipped to the first bolt in either direction.

• Smooth rope handling – Does not add friction while paying out rope during normal climbing.

• Controlled lowering – Makes lowering a heavier climber easier.

• Durable construction – Built with aluminium, steel and polyamide components.

Specifications

• Approved rope diameter: 8.9–11mm

• Weight: 450g

• Minimum belayer weight: 40kg

• Materials: Aluminium, steel, polyamide and LDPE

• Position: Clips to the first bolt in the safety chain

• Compatible carabiners: EN 12275 or EN 362 certified

• Intended use: Lead climbing with a heavier climber and lighter belayer

Important: The OHM II is not a belay device and must always be used with a suitable belay device. Users must read and follow Edelrid’s instructions before use.