Overview
ISO 21853:2020 - "Kite boarding - Release system - Safety requirements and test methods" specifies minimum safety requirements and laboratory test methods for release systems used in kite boarding. The standard covers systems that intentionally reduce kite pull and/or disconnect the rider from the kite, and is intended for devices operated by the user or another person. ISO 21853 focuses on practical safety aspects relevant to real sport conditions (dry, sand, water, cold/wet) and was developed with input from industry stakeholders including the Global Kitesports Association (GKA).
Key topics and technical requirements
- Scope and definitions: Clear terminology for kite, release system, main release system, disconnecting release system, connecting link and control system.
- Strength requirements:
- Main release system: withstand 3× maximum user weight or 3 600 N (whichever is greater) without breakage and must still function.
- Disconnecting release system and connecting link: withstand 2× maximum user weight or 2 400 N (whichever is greater).
- Design and marking:
- Triggering direction must be permanently identifiable (e.g., 3D structure, embossed arrow).
- Triggering element must be predominantly (>50 %) red on its visible surface.
- Avoid finger entrapments, sharp edges and squeeze/shear points.
- Handling and ergonomics:
- Main release and disconnecting release each operable by a single action.
- Triggering action must be suitable for natural user movement and achievable while wearing garments (e.g., gloves).
- Triggering force requirement: between 20 N and 170 N.
- Behaviour and durability:
- Release systems must not show permanent deformation after use and must continue to function.
- Additional requirements and tests for cold and wet conditions, and for contamination with sand (sand shown to affect performance).
- Test methods and environment:
- Detailed test apparatus, sampling, preparation and procedures for dry/clean, dry sand, water with sand, and cold/wet conditions.
- Test reporting and durability of marking are specified.
Applications and who uses this standard
ISO 21853 is essential for:
- Manufacturers of kites, harnesses, control bars and release systems - for product design, testing and technical documentation.
- Test laboratories and certification bodies - for standardized safety testing and conformity assessment.
- Trainers, retailers and fleet operators - to evaluate equipment safety claims.
- Regulators and standards committees - for policy and safety guidance in kitesports.
- End users (kiters) benefit indirectly through safer product designs informed by this standard.
Related standards
- ISO 21853 references normative documents such as ISO 679 and EN 12275 and was prepared by ISO/TC 83 (Sports and other recreational facilities and equipment). The standard notes that salt vs non-salted water showed no test result difference, while sand has a prominent effect on function and testing.
