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Foot & Knee Ascenders

Foot ascenders put a cam on the climber's instep, which allows the climber to slide the ascender up the rope, then stand on that foot and straighten their body. This allows the larger muscles in the legs to advance the climbers weight, dramatically improving the ease of ascent. Like other cammed ascenders, a foot ascender is only helpful as the climber ascends the line, and will have to be disengaged to work the tree or descend. Some climbers prefer to remove the foot ascender once in the canopy, while others will simply disengage the foot ascender and continue to wear it.

Foot ascenders are a key component of Frog style SRT systems and can also be used when climbing MRT (Moving Rope Technique, formally DdRT) to make ascending much easier.

Knee ascenders place an ascender at knee height. This allows for two cammed devices to work in tandem without colliding on the line. A footloop is attached to the bottom and a bungee tether tends the ascender. Pairing a knee ascender with a foot ascender makes for a very efficient and quick ascension system.



"Walk" up the tree with this super-compact Self Advancing Knee Ascender (SAKA). The SAKA Mini is the newest evolution of the knee ascender, and better than ever!

In conjunction with a foot ascender, the SAKA mini allows a climber to simply walk up a rope. 2' of 5/8" adjustable webbing makes the device effectively "one-size-fits-all." Easy to use, with simple adjustments.

Weighing only 7.95 ounces, the device is easy to store and carry. Features 2' of super stretch bungee with a Dyneema cover for added strength and wear resistance. Uses the same great ascender as the original SAKA, with progressive tooth pattern and a rope friendly spring. Will work on common arborist climbing line sizes, from 9mm to 13mm.

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Knee Ascent Loop by Petzl New in 2019!


Petzl has stepped up with a new floating knee ascender! The Knee Ascent will work great in your rope walking system and comes in a version with foot loop or in a clipped version if you have boots with an ascender loop. The Knee Ascent has a built-in tether to go to your mechanical prusik to help tend it. The Croll L rope clamp is integrated for a quick and comfortable ascent. The system is entirely adjustable and adapts to all shapes and sizes.

Both the Knee Ascent Clip and Knee Ascent Loop come with a an XS Petzl Toolbag to store the system neatly out of the way once you're done with your ascent and ready to work.

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HAAS Velox Ascent System

HAAS Velox Ascent System


The HAAS Ascent System uses a bungee strap to tend an ascender knee height with an adjustable foot loop attached. Combined with a foot ascender on your dominant side, you can climb quickly and easily in single rope or doubled rope systems. Many climbers prefer this method of ascent to a traditional rope walker, as the HAAS makes climbing more intuitive and easier to coordinate.

The HAAS Velox has been updated into a one-size-fits all knee ascender with 30 inches of bungee elongation for a smooth return and rapid ascent. Adjustable foot strap, CT ascender, brass snap. Bungee is quickly replaceable without tools. HAAS Velox works with ropes up to 13mm (1/2") in diameter.

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Camp Turbo Foot Ascender

Right Foot
Left Foot

Foot ascenders are about to take a big step with the advent of the Turbo ascender from Italian manufacturer CAMP. These foot ascenders are compact and lightweight as you would expect from top-quality climbing gear, but the real exciting development is in the rollers that sit opposite the tooth cam. These rollers increase ascending efficiency and reduce wear on your climbing lines and the ascender. The straps on the Turbo foot are easy to adjust and reinforced on the step. Available right or left. Fits 8mm-13mm rope (up to 1/2"). Weighs 4.8oz.

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Petzl Pantin Foot Ascender (2016 Model)

Right Foot
Left Foot
Right Strap
Left Strap

Petzl's Pantin foot ascender has been updated in 2016 with improved performance and a separate catch which can be added to help keep the pantin on the rope during ascents. The Pantin is super-sleek and low-profile, and quick to get install and remove from the rope, and easily adjustable with friction buckles. Works with ropes from 8mm to 13mm. Weighs only 3 oz.

Replacement straps are also available to help keep your ascender in top shape.

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Petzl Pantin Catch

Petzl Pantin Catch

Right Catch
Left Catch

Catch for PANTIN foot ascender, helps to keep the rope in the device during rope ascents. It is available for PANTIN in right- and left-foot versions.

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ISC Foot Ascender

ISC Stryder Foot Ascender

Right Foot
Left Foot

Arborist foot ascender from ISC. The buckle on this ascender is easy to adjust, and quick to release. Aluminum body, webbing straps and step. ISC Stryder foot ascender demo video.

For ropes 8 - 13mm (up to 1/2”). WLL 140 kg / 310 lb.

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Quick Step Foot Ascender

Right Foot
Left Foot

An easy-to-install foot ascender with fully-adjustable webbing, reinforced on the bottom with tubular webbing. The Quick Step is balanced to avoid twisting, and can be removed from the line with a simple, backwards motion. Aluminum body, 1/2" capacity. This is a great mid-sized foot ascender, sizing in right between the Pantin and CMI foot ascenders. Choose between right foot (orange) and left foot (gray). Rope and boots sold separately. Weighs 6.5 oz.

CT Foot Ascender overview by Niceguydave

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CMI Foot Ascender

CMI Foot Ascender

Right Foot
Left Foot

Rope climbing is made easier by the CMI Foot Ascender. The addition of this boot-mounted device maintains tension on the rope, allowing for easier advancement of the main ascender, and promotes better use of body mechanics by keeping your body in an upright position. The body is crafted from anodized aluminum, and the hard coated cams carry CMI's exclusive wear-out guarantee, the same as our popular Ultrascenders ascenders. 1/2” capacity.

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