Reference	Title	Category
ISO/TC 31	Tyres, rims and valves	A
ISO/TC 31/SC 3	Passenger car tyres and rims	A
ISO/TC 31/SC 4	Truck and bus tyres and rims	A
ISO/TC 31/SC 5	Agricultural tyres and rims	A
ISO/TC 31/SC 6	Off-the-road tyres and rims	A
ISO/TC 31/SC 7	Industrial tyres and rims	A
ISO/TC 31/SC 9	Valves for tube and tubeless tyres	A
ISO/TC 31/SC 10	Cycle, moped, motorcycle tyres and rims	A

Notes

Liaisons A: Organizations that make an effective contribution to the work of the technical committee or subcommittee for questions dealt with by this technical committee or subcommittee. 
Liaisons B: Organizations that have indicated a wish to be kept informed of the work of the technical committee or subcommittee. 
Liaisons C: Organizations that make a technical contribution to and participate actively in the work of a working group.