GB/T 2983-2015 in English

《GB/T 2983-2015摩托车轮胎系列》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。
本标准规定了摩托车轮胎术语和定义、分类、规格标志及其附加标志的表示方法、规格、尺寸、气压与负荷及轮辋。
本标准适用于新的摩托车充气轮胎。

1 Scope

This standard specifies the terms and definitions, classification, designation method for specifications marks and additional marks, specifications, dimensions, pneumatic pressures, loads and rims of motorcycle tyres.

This standard is applicable to new pneumatic tyres of motorcycles.

2 Normative References

The following documents are indispensable for application of this standard. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB 518 Motorcycle Tyres
GB/T 6326 Tyre Terms and Definitions (GB/T 6326-2014, ISO 4223-1: 2002)
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values
GB/T 13202 Series of Motorcycle Rims (GB/T 13202-2015, ISO 4249-3: 2010, ISO 5995-2: 1988, ISO 6054-2: 1990)

3 Terms and Definitions

For the purpose of this standard, the following terms and definitions and those established in GB/T 6326 apply.

3.1

centrifugal radius

the permissible maximum dynamic radius for grown high-speed motorcycle tyre under the action of centrifugal force when travelling at its maximum speed, which is related to vehicle's maximum speed and is used as reference for tyre clearance design for corresponding high-speed motorcycle

3.2

rolling radius

the value of motorcycle tyre's rolling circumference divided by 2π, which is used as reference for tyre selective assembly or vehicle design and adjustment

Note: the rolling circumference refers to the distance covered by tyre when rolling one whole circle under specified conditions.

4 Classification

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Designation Method for Specifications Marks and Additional Marks
6 Specifications, Dimensions, Pneumatic Pressures, Loads and Rims
Annex A (Informative) Tread Types of Motorcycle Tyres
Annex B (Normative) Characteristics of Tyre Service Conditions
Annex C (Normative) Reference Data for Service of Partial Motorcycle Tyres