1 Scope
This standard specifies the types, requirements, test methods and marking of cycle inner tubes.
This standard is applicable to mould vulcanized inner tubes for assembling cycle tyres.
This standard is not applicable to non-mould vulcanized inner tubes and inner tubes for tubular tyres for racing cycles.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
GB/T 1796.1 Tyre valves - Part 1: Clamp-in valves
GB/T 1796.2 Tyre valves - Part 2: Rubber base valves
GB/T 7377 Series of cycle tyres
GB/T 9749 Performance testing method for cycle tyres
3 Types of inner tubes
Inner tubes can be classified into two categories by their materials:
——Category A: inner tubes made of or mainly made of natural rubber;
——Category B: inner tubes made of or mainly made of butyl rubber.
Foreword i
1 Scope
2 Normative references
3 Types of inner tubes
4 Requirements
5 Test methods
6 Marking
