Stein Ascentra Knee Ascender

The STEIN ASCENTRA is a Knee Ascent System, a simple, yet highly effective climbing aid designed to make ascending your climbing system easier, smoother, and faster. Built for use with Stationary Rope Systems (SRS), it works in conjunction with a foot ascender to capture the progress made with each step, improving efficiency during ascent.

Designed with practical tree climbing in mind, this knee ascender system is easy to install and remove, making it a convenient addition to your climbing setup. It is suitable for use on ropes from 9mm to 13mm and is equipped with the STEIN Chest Ascender Rope Clamp for dependable progression. The bottom sling is made from durable 4mm HPME cord with a 24-strand outer protective sheath, while the high-quality bungee cord provides fast, responsive action during movement. The system can be clipped into a chest harness or attached directly to a tree climbing harness.

Because every climber’s body size, harness setup, and climbing technique vary, the ASCENTRA is supplied as a self-assembly kit. Users must ensure the product is assembled and adjusted correctly for their specific setup. Professional instruction from a fully qualified and competent trainer is strongly recommended before use.

Please note that this kit requires a STEIN CAMBO Foot Loop in addition to the supplied components, these are available in three sizes subject to your footwear size.

Key Features

• Designed to assist ascent in Stationary Rope System (SRS)
• Works alongside a foot ascender for smoother progression
• Easy to install and remove
• Suitable for ropes from 9–13mm
• Durable sling construction with 4mm HPME cord and 24-strand cover
• High-quality bungee for immediate response during ascent
• Can be attached to a chest harness or tree climbing harness

This box contains the following items:

• 1 x SS-4922978088 STEIN Ascender
• 1 x SS-5530027P01 STEIN Lower Sling
• 1 x STEIN CONNEXT Karabiner - Blue
• 1 x STEIN CONNEXT Karabiner GOLD
• 1 x 1m Black Bungee Cord (cut to user size)