Standard No.:	GB/T 2978-2014
English Name:	Size designation,dimensions,inflation pressure and load capacity for passenger car tyres
Chinese Name:	轿车轮胎规格、尺寸、气压与负荷
Chinese Classification:	G41    Tyre
Professional Classification:	GB    National Standard
ICS Classification:	83.160.10 83.160.10    Road vehicle tyres 83.160.10
Source Content Issued by:	AQSIQ; SAC
Issued on:	2014-12-05
Implemented on:	2015-10-1
Status:	superseded
Superseded by:	GB/T 2978-2024 Size designation, dimensions, inflation pressure and load capacity for passenger car tyres
Superseded on:	2025-4-1
Abolished on:	2025-04-01
Superseding:	GB/T 2978-2008 Size designation dimensions inflation pressure and load capacity for passener car tyres
Target Language:	English
File Format:	PDF
Word Count:	17500 words
Translation Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terms and definitions, the methods for expressing tyre size designation, and dimensions, inflation pressure and load capacity corresponding to the tyre size designation for passenger car tyres. This standard is applicable to new pneumatic passenger car 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 3 Terms and definitions For the purpose of this document, the terms and definitions established in GB/T 6326 apply. 4 Methods for expressing the size designation for tyres Passenger car tyres are defined and expressed in terms of tyre size designation and instructions. Example 1:

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Methods for expressing the size designation for tyres 5 Size designation, dimensions, inflation pressure and load capacity for passenger car tyres 6 Valves Annex A (Normative) Corresponding Relation between Load Index and Load Capability Annex B (Normative) Corresponding Relation between Speed Symbol and Maximum Speed Table 1 80 series radical tyres for passenger cars Table 2 75 series radical tyres for passenger cars Table 3 70 series radical tyres for passenger car Table 4 65 series radical tyres for passenger cars Table 5 60 series radical tyres for passenger cars Table 6 55 series radical tyres for passenger cars Table 7 50 series radical tyres for passenger cars Table 8 45 series radical tyres for passenger cars Table 9 40 series radical tyres for passenger cars Table 10 35 series radical tyres for passenger cars Table 11 30 series radical tyres for passenger cars Table 12 25 series radical tyres for passenger cars Table 13 T-type temporary-use spare tyre Table 14 Reserved old series of radical tyres for passenger cars Table 15 Reserved old series of diagonal tyresa for passenger cars Table 16 Relations between load and inflation pressure of the standard radial tyre for passenger cars Tale 17 Relations between load and inflation pressure of enhanced radial tyres for passenger cars Table 18 Minimum inflation pressure adjustment for the radial tyre for passenger cars with speed over 160 km/h Table 19 Variation percentage of load capability of passenger car tyres with running speed over 210km/h Table 20 Model of valves for passenger car tyres Table A.1 Corresponding relation between load index and load capability Table B.1 Corresponding relation between speed symbol and maximum speed