Overview
ISO 29802:2017 defines the designation, dimensions, marking and load ratings for pneumatic all-terrain (AT) tyres and their matching rims fitted to 5° tapered drop-centre rims. The standard targets tyres with nominal rim diameters coded 7–14 and establishes parameters for reference inflation pressures, service descriptions and rim contours. It is the international reference for manufacturers, OEMs and conformity assessment bodies working with ATV tyres and rims.
Key topics and technical requirements
- Tyre designation format: Clear syntax for identifying tyres, e.g. prefix, nominal overall diameter code, nominal section width code, construction code and nominal rim diameter code (example format: AT 23 x 10 R 10).
- Nominal codes and tables: Defined nominal overall diameters, section widths and rim diameter codes (tables for D_o, S_n and D_r).
- Construction codes: Radial (R) and diagonal (D or “–”) construction designators.
- Service description and markings:
- Load index and speed symbol (service description placed near dimensional marking).
- Reference inflation pressure identified by symbols corresponding to specific kPa values (e.g., symbols for 25, 35, 45 kPa).
- Off-road restriction marking: NHS / NOT FOR HIGHWAY SERVICE / NOT FOR HIGHWAY USE.
- Other markings: TUBELESS, rotation direction arrows, etc.
- Speed and load considerations: Scope covers tyres for speeds not exceeding 130 km/h (Speed Symbol M). The standard also specifies the reference speed for tyre load identification for AT tyres (see clause on speed symbol, e.g. F = 80 km/h for load identification in the document).
- Dimensional calculations and limits: Methods to calculate theoretical rim width, design tyre section width and overall diameter, maximum grown/overall dimensions, minimum dimensions and range of approved rim widths. Measurements are rounded per ISO 80000-1 rules.
- Rims and valve details: Requirements for rim designation, marking, contour profiles, hump circumference, and valve hole types (including snap-in valves).
- Load ratings: Reference load carrying capacities and a normative annex with load indices for AT tyres.
Practical applications
- Ensures consistent tyre and rim interchangeability for ATVs and related off-road vehicles.
- Guides tyre and rim design, quality control, production marking and technical documentation.
- Supports regulatory compliance, import/export technical checks, and safety testing laboratories.
- Helps fleet operators, dealers and installers verify correct tyre/rim matching and permitted service conditions.
Who should use this standard
- Tyre and rim manufacturers
- All-terrain vehicle (ATV) OEMs and aftermarket suppliers
- Testing and certification bodies
- Vehicle fleet managers, dealers and fitters
- Regulatory authorities and standards committees
Related standards
Keywords: ISO 29802:2017, all-terrain tyres, ATV tyres, 5° tapered rims, tyre dimensions, tyre markings, load ratings, NHS, tubeless.