Standard No.:	GB/T 31549-2015
English Name:	Performance testing method for electric bicycle tyres
Chinese Name:	电动自行车轮胎性能试验方法
Chinese Classification:	G41    Tyre
Professional Classification:	GB    National Standard
ICS Classification:	83.160.10 83.160.10    Road vehicle tyres 83.160.10
Issued by:	AQSIQ; SAC
Issued on:	2015-05-15
Implemented on:	2016-2-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	114.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terms and definitions, classification, specification marks, basic parameters, main dimensions and measurement methods for electric bicycle tyres. This standard is applicable to 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 document (including any amendments) applies. GB/T 6326 Tyre Terms and Definitions GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment 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 purpose of this document, the following terms and definitions and those defined in GB/T 6326 apply. 3.1 croctchet type (CT) tyre the tyre with the bead core of tyre adopting steel wire or other high-strength materials, and the bead contour shape matching with the crotchet type (CT) rim

Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 Specification Mark, Basic Parameter and Main Dimension 6 Measurement Method Annex A (Normative) Calculation of Tyre Dimension Annex B (Informative) Tyre with Section Width of New Tyres (S) Exceeding 54 mm - Basic Parameter and Main Dimension