1 Scope
This standard specifies the types, requirements, test methods and marking of electric bicycle inner tubes.
This standard is applicable to mould vulcanized inner tubes for assembling electric bicycle tyres.
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 1796.1 Tyre valves - Part 1: Clamp-in valves
GB 1796.2 Tyre valves - Part 2: Rubber base valves
GB/T 31546 Electric bicycle tyres
GB/T 31548 Series of electric bicycle tyres
GB/T 31549 Performance testing method for electric bicycle tyres
3 Types
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
4 Requirements
5 Test methods
6 Marking
