Petzl - Spare strap Knee Ascent
Right of Return
Right of Return
You always have a 14-day right of return at Arboristbutiken.
Shipping & Delivery
Shipping & Delivery
Free shipping on all orders over 2000 SEK. Arboristbutiken uses DHL, and orders placed before 12:00 are shipped the same day. Delivery time within Sweden is usually 1-2 working days.
Size Guide
Official measurement charts for climbing harnesses, chainsaw protective trousers, shoes, gloves, and jackets. All measurements are in centimeters unless otherwise specified.
| Size | Waist Belt (cm) | Leg Loop (cm) | Body Height (cm) | Weight (g) |
|---|---|---|---|---|
| 0 | 65–80 | 44–59 | 160–180 | 1 935 |
| 1 | 70–93 | 47–62 | 165–185 | 1 975 |
| 2 | 83–120 | 50–65 | 175–200 | 2 075 |
Applies to Petzl AVAO & SEQUOIA. Measurements refer to body measurements, not clothing measurements.
| Size | Hip/Waist (cm) | Thigh/Leg Loop (cm) | Max User Weight |
|---|---|---|---|
| S | 69–86 | 38–57 | 150 kg |
| M | 80–105 | 42–72 | |
| L | 92–129 | 48–87 |
Applies to TreeMotion Pro X. Unisex ergonomic design. Max 150 kg including equipment.
| Size | Waist Measurement (cm) | Leg Loop (cm) |
|---|---|---|
| S (Small) | 65–83 | 44–59 |
| M (Medium) | 75–102 | 47–63 |
| L (Large) | 88–123 | 51–73 |
Applies to Kinisi MAX, PRO and KEY. Side rings should be centered on the hip or slightly forward. Max 150 kg.
| Size | Waist (cm) | Regular Leg Length (cm) |
|---|---|---|
| XS | 80 | 80 |
| S | 86 | 81–83 |
| M | 90 | 85–86 |
| L | 94 | 88–89 |
| XL | 98 | 86 |
| 2XL | 102 | 86 |
Class 1 chainsaw protection, Type A, 20 m/s. Slim design with 4-way stretch.
| Size | Waist Measurement (cm) | Leg Loop (cm) |
|---|---|---|
| XS/S | 60–80 | 40–55 |
| M/L | 75–100 | 48–65 |
| XL/XXL | 90–120 | 55–75 |
Check the manufacturer's current datasheet for model-specific measurements. General guidelines are shown above.
| Size | Waist Measurement (cm) | Leg Loop (cm) |
|---|---|---|
| S | 62–80 | 40–56 |
| M | 76–98 | 48–64 |
| L | 88–118 | 53–72 |
Check the manufacturer's current datasheet for model-specific measurements.
| Size | Waist Measurement (cm) | Leg Loop (cm) |
|---|---|---|
| S/M | 66–96 | 41–61 |
| L/XL | 86–121 | 51–76 |
Check the manufacturer's current datasheet for model-specific measurements.
| Size | Waist (cm) | Regular Leg Length (cm) | Long Leg Length (cm) | Short Leg Length (cm) |
|---|---|---|---|---|
| 2XS | 74 | 80 | 87 | 75 |
| XS | 80 | 80 | 87 | 75 |
| S | 86 | 80 | 87 | 75 |
| M | 92 | 80 | 87 | 75 |
| L | 98 | 80 | 87 | 75 |
| XL | 104 | 80 | 87 | 75 |
| 2XL | 110 | 80 | 87 | 75 |
| 3XL | 116 | 80 | 87 | 75 |
| 4XL | 122 | 80 | 87 | 75 |
Body measurements. Choose leg length (regular/long/short) separately.
| EU Size | Waist (cm) | Regular Leg Length (cm) | Long Leg Length (cm) |
|---|---|---|---|
| 42 | 74 | 80 | 88 |
| 44 | 78 | 80 | 88 |
| 46 | 82 | 82 | 90 |
| 48 | 86 | 82 | 90 |
| 50 | 90 | 82 | 90 |
| 52 | 94 | 82 | 90 |
| 54 | 98 | 83 | 90 |
| 56 | 102 | 83 | 90 |
| 58 | 108 | 83 | 90 |
| 60 | 114 | 83 | 90 |
Waist measured at the top edge of the trousers (Bundweite). Stretch-Zone provides an elastic fit.
| Size | Waist (cm) | Short Leg Length (cm) | Regular Leg Length (cm) | Long Leg Length (cm) |
|---|---|---|---|---|
| XS | 63–71 | – | 79 | – |
| S | 71–87 | 74 | 79 | 84 |
| M | 81–89 | 74 | 79 | 84 |
| L | 89–97 | 74 | 79 | 84 |
| XL | 97–107 | 74 | 79 | 84 |
| XXL | 107–114 | 74 | 79 | 84 |
| 3XL | 114–122 | – | 79 | – |
| 4XL | 122–129 | – | 79 | – |
| 5XL | 129–137 | – | 79 | – |
Leg length = inseam (crotch to ankle bone). BreatheFlex Pro has a slimmer fit in the thighs and legs than standard Breatheflex.
| Size | Waist (cm) |
|---|---|
| XS | 66–74 |
| S | 74–82 |
| M | 82–90 |
| L | 90–98 |
| XL | 98–106 |
| XXL | 106–117 |
| XXXL | 117–129 |
| XXXXL | 129–141 |
Body measurements. Leg length varies per model – see product datasheet. If size differs, custom manufacturing can be ordered.
| Size | Waist (cm) | Leg Length (cm) |
|---|---|---|
| XS | 80 | 80 |
| S | 86 | 81–83 |
| M | 90 | 85–86 |
| L | 94 | 88–89 |
| XL | 98 | 86 |
| 2XL | 102 | 86 |
Body measurements. 4-way stretch material.
| Size | Waist (cm) | Leg Length (cm) |
|---|---|---|
| S | 72–80 | 78 |
| M | 80–88 | 80 |
| L | 88–96 | 82 |
| XL | 96–106 | 82 |
| XXL | 106–116 | 82 |
Check the manufacturer's current datasheet for model-specific measurements.
| Size | Waist (cm) | Leg length (cm) |
|---|---|---|
| S | 74–84 | 80 |
| M | 84–94 | 82 |
| L | 94–104 | 82 |
| XL | 104–114 | 82 |
| XXL | 114–124 | 82 |
Check the manufacturer's current data sheet for model-specific measurements.
| EU | UK | US | Foot Length (cm) | Foot Width (cm) |
|---|---|---|---|---|
| 36 | 3 | 4 | 24.3 | 8.4 |
| 37 | 4 | 5 | 25.0 | 8.6 |
| 38 | 5 | 6 | 25.6 | 8.7 |
| 39 | 6 | 7 | 26.3 | 8.9 |
| 40 | 6.5 | 7.5 | 27.0 | 9.0 |
| 41 | 7 | 8 | 27.6 | 9.2 |
| 42 | 8 | 9 | 28.3 | 9.3 |
| 43 | 9 | 10 | 29.0 | 9.5 |
| 44 | 10 | 11 | 29.6 | 9.6 |
| 45 | 10.5 | 11.5 | 30.3 | 9.8 |
| 46 | 11 | 12 | 31.0 | 9.9 |
| 47 | 12 | 13 | 31.6 | 10.1 |
| 48 | 13 | 14 | 32.3 | 10.2 |
| 49 | 14 | 15 | 33.0 | 10.4 |
Foot length: measure with even weight distribution, heel to longest toe. Choose a larger size if you are in between.
| EU | UK | US | Foot Length (cm) | Mondo Point (cm) |
|---|---|---|---|---|
| 38 | 5 | 6 | 22.0 | 24.0 |
| 38.5 | 5.5 | 6.5 | 22.5 | 24.5 |
| 39 | 6 | 7 | 23.0 | 25.0 |
| 40 | 6.5 | 7.5 | 23.5 | 25.5 |
| 40.5 | 7 | 8 | 24.0 | 26.0 |
| 41 | 7.5 | 8.5 | 24.5 | 26.5 |
| 42 | 8 | 9 | 25.0 | 27.0 |
| 42.5 | 8.5 | 9.5 | 25.5 | 27.5 |
| 43 | 9 | 10 | 26.0 | 28.0 |
| 44 | 9.5 | 10.5 | 26.5 | 28.5 |
| 44.5 | 10 | 11 | 27.0 | 29.0 |
| 45 | 10.5 | 11.5 | 27.5 | 29.5 |
| 46 | 11 | 12 | 28.0 | 30.0 |
| 46.5 | 11.5 | 12.5 | 28.5 | 30.5 |
| 47 | 12 | 13 | 29.0 | 31.0 |
| 47.5 | 12.5 | 13.5 | 29.5 | 31.5 |
| 48 | 13 | 14 | 30.0 | 32.0 |
EU size may run half a size small – consider sizing up. Mondo Point = foot length + approx. 2 cm toe room.
| EU | Foot Length (cm) |
|---|---|
| 37 | 22.9 |
| 38 | 23.5 |
| 39 | 24.2 |
| 39.5 | 24.7 |
| 40 | 24.9 |
| 40.5 | 25.1 |
| 41 | 25.5 |
| 42 | 26.1 |
| 42.5 | 26.4 |
| 43 | 26.7 |
| 44 | 27.4 |
| 44.5 | 27.8 |
| 45 | 28.3 |
| 45.5 | 28.8 |
| 46 | 29.3 |
| 47 | 29.7 |
| 48 | 30.2 |
| 49 | 30.8 |
ZBPK last: good heel grip, generous toe box. May fit half a size smaller than everyday shoes. Measure foot with sock on.
| EU | Foot Length (cm) |
|---|---|
| 38 | 24.0 |
| 39 | 24.7 |
| 40 | 25.3 |
| 41 | 26.0 |
| 42 | 26.7 |
| 43 | 27.3 |
| 44 | 28.0 |
| 45 | 28.7 |
| 46 | 29.3 |
| 47 | 30.0 |
Standard EU → foot length conversion. Check manufacturer's data sheet for exact fit.
| Hand Size | Label | Hand Circumference (cm) | Hand Length (cm) |
|---|---|---|---|
| 6 | XS/S | 15.2 | 16.0 |
| 7 | S | 17.8 | 17.1 |
| 8 | M | 20.3 | 18.2 |
| 9 | L | 22.9 | 19.2 |
| 10 | XL | 25.4 | 20.4 |
| 11 | XXL | 27.9 | 21.5 |
| 12 | 3XL | 30.4 | >21.5 |
According to EN ISO 21420:2020. Hand size = number designation from the standard. Sizes 7–12 most commonly available.
| Palm Width (cm) | Size |
|---|---|
| 7 | S |
| 8 | M |
| 9 | L |
| 10 | XL |
| 11 | XXL |
| 12 | 3XL |
Measure the palm width flat with a ruler or tape measure. Size up for a looser fit. StretchFlex provides an elastic, finger-agile fit.
| Size | Hand Circumference (cm) |
|---|---|
| S | 17–19 |
| M | 19–21 |
| L | 21–23 |
| XL | 23–25 |
| XXL | 25–27 |
Measure circumference around the widest part of your hand (knuckles). Check the product data sheet for model-specific measurements.
| Size | Hand Circumference (cm) |
|---|---|
| 7 (S) | 17–19 |
| 8 (M) | 19–21 |
| 9 (L) | 21–23 |
| 10 (XL) | 23–25 |
| 11 (XXL) | 25–27 |
Guide Gloves use European hand sizes. Check the manufacturer's data sheet.
| Size | Hand Circumference (cm) |
|---|---|
| S | 17–19 |
| M | 19–21 |
| L | 21–23 |
| XL | 23–25 |
| XXL | 25–27 |
Check the manufacturer's data sheet for model-specific measurements.
| Size | Hand Circumference (cm) |
|---|---|
| S | 17–19 |
| M | 19–21 |
| L | 21–23 |
| XL | 23–25 |
Check the manufacturer's data sheet for model-specific measurements.
| Size | Chest (cm) | Waist (cm) | Body Length (cm) |
|---|---|---|---|
| XS | 84–89 | 70–75 | 166–171 |
| S | 90–95 | 76–81 | 172–177 |
| M | 96–101 | 82–87 | 178–183 |
| L | 102–107 | 88–93 | 184–189 |
| XL | 108–113 | 94–99 | 184–189 |
| XXL | 114–121 | 100–109 | 184–189 |
| 3XL | 122–129 | 110–117 | 184–189 |
Body measurements. Check the product page for specific model size information.
| Size | Chest (cm) | Waist (cm) |
|---|---|---|
| XS | 82–86 | 72–76 |
| S | 86–90 | 76–80 |
| M | 90–94 | 80–84 |
| L | 94–98 | 84–88 |
| XL | 98–104 | 88–94 |
| XXL | 104–110 | 94–100 |
| 3XL | 110–116 | 100–106 |
| 4XL | 116–122 | 106–112 |
Body measurements. Check the manufacturer's data sheet for model-specific measurements.
| Size | Chest (cm) | Waist (cm) |
|---|---|---|
| XS | 80–88 | 68–76 |
| S | 88–96 | 76–84 |
| M | 96–104 | 84–92 |
| L | 104–112 | 92–100 |
| XL | 112–122 | 100–110 |
| XXL | 122–132 | 110–120 |
| XXXL | 132–142 | 120–130 |
Body measurements. Check the product data sheet for model-specific measurements.
| Size | Chest (cm) | Waist (cm) |
|---|---|---|
| S | 88–96 | 76–84 |
| M | 96–104 | 84–92 |
| L | 104–112 | 92–100 |
| XL | 112–120 | 100–108 |
| XXL | 120–128 | 108–116 |
| 3XL | 128–136 | 116–124 |
Check the manufacturer's current data sheet for model-specific measurements.
Description
Description
Petzl Lower Strap (Spare strap) for the KNEE ASCENT system – increased durability and optimal foot positioning for arborists and tree climbers.
This lower strap is an essential spare part for the Petzl KNEE ASCENT system (LOOP or CLIP). It increases durability and features a foot loop for optimal foot positioning. The strap attaches to the lower hole of the CROLL rope clamp (or equivalent ascender).
Features
- Increases the durability of the KNEE ASCENT unit during intensive use in treetops.
- Foot loop for optimal and secure foot positioning during knee ascent.
- Easy attachment to the lower hole of the rope clamp (CROLL or similar).
- Compatible with both KNEE ASCENT LOOP (for normal shoes) and KNEE ASCENT CLIP (for shoes with integrated tritsling).
- Designed for professional arborist equipment in combination with ZIGZAG/ZIGZAG PLUS, CHICANE, and PANTIN.
Technical Specifications
- Material: High-quality polyester webbing for extreme durability and weather resistance.
- Area of Use: Spare part for the KNEE ASCENT system, lower strap.
- Compatibility: Petzl KNEE ASCENT LOOP/CLIP, CROLL rope clamp, ZIGZAG/ZIGZAG PLUS (with CHICANE and PANTIN).
- Weight: Lightweight construction for minimal impact on mobility (exact weight not specified in technical info).
- Certification: Meets Petzl's safety standards for personal protective equipment (PPE).
- Attachment Method: Attaches directly to the ascender's lower hole for stable knee ascent.
Use and Assembly
Attach the lower strap to the CROLL rope clamp's lower hole. Use in combination with the upper strap, elastic strap, and height adjustment buckle for optimal performance. Adjust the tension to ensure the system remains taut even when kneeling.
Note: Always check compatibility and inspect the equipment before each use according to Petzl's technical instructions.

