GB/T 31548-2015 in English

《GB/T 31548-2015电动自行车轮胎系列》由TC19（全国轮胎轮辋标准化技术委员会）归口，TC19SC3（全国轮胎轮辋标准化技术委员会摩托车和自行车轮胎轮辋分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了电动自行车轮胎的术语和定义、分类、规格标志、基本参数、主要尺寸和测量方法。
本标准适用于电动自行车充气轮胎。
本标准不适用于非充气轮胎。

1 Scope

This standard specifies the terms and definitions, classification, size designations, basic parameters, main dimensions and measuring methods of electric bicycle tyres.

This standard is applicable to the pneumatic tyres for electric bicycle.

This standard is not applicable to non-pneumatic 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 documents (including any amendment) applies.

GB/T 6326 Tyre terms and definitions
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 31580 Series of electric bicycle rims
HG/T 2906 Static loaded performance testing method for cycle tyres

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 6326 and the following apply.

3.1
croctchet type tyre
tyre with bead core made by steel wire or other high-strength materials, and the shape of bead matching with croctchet type (CT) rim

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Size designations, basic parameters and main dimensions
6 Measurement method
Annex A (Normative) Calculation of tyre dimensions
Annex B (Informative) New tyres with section width (S) exceeding 54 mm - basic parameters and main dimensions