Petzl Ascentree 2-Hand Tree Climbing Ascender

Ergonomic 2-Hand Ascender for Secured Double Rope Ascent

The Petzl Ascentree was purpose-built for arborists who need an ergonomic, efficient solution for secured double rope technique (DRT) ascent. Compatible with ropes from 8–13mm, its redesigned cams reduce abrasion on most ropes while delivering smooth, reliable progress capture on the way up the tree.

Key Features

• Designed for secured double rope ascent (DRT) — the go-to technique for many professional arborists
• Compatible with 8–13mm rope diameter — works with a wide range of climbing ropes
• Newly designed cams — reduce abrasion on most ropes for longer rope life
• Ergonomic 2-hand design — comfortable and efficient for extended climbs
• Brand: Petzl

Specifications

• Brand: Petzl
• Type: 2-hand ascender
• Rope diameter: 8–13mm
• Application: Tree climbing, arboriculture, secured DRT ascent

Quick Decision Guide

• Climbing on doubled rope (DRT)? The Ascentree is specifically designed for this technique.
• Climbing on a single static line (SRT)? Consider the ISC Rope Wrench ZK-2 for SRT work positioning.
• Want a single-handle ascender instead? See the Petzl Ascension.
• Need a foot ascender to pair with this? See the Petzl Pantin or CT Quick Step Foot Ascender.

Frequently Asked Questions

What rope diameters does the Ascentree work with?
It is compatible with ropes from 8mm to 13mm in diameter.

What is secured double rope technique (DRT)?
DRT (also called doubled rope technique or moving rope system) involves climbing on a rope that passes through an anchor point in the tree, with both ends accessible to the climber. It is one of the most common techniques used in professional arboriculture.

How do the new cams reduce rope abrasion?
Petzl redesigned the cam geometry on the Ascentree to distribute load more evenly across the rope, reducing wear on the sheath compared to earlier designs.