GB/T 29042-2020: Thresholds and grading of rolling resistance for motor vehicle tyres

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Scope

This Standard specifies terms and definitions for thresholds and grading of rolling
resistance for motor vehicle tyres, requirements and test methods for thresholds and
grading of rolling resistance coefficient.
This Standard applies to new radial tyres for passenger cars and new radial tyres for
miniature and light trucks and new radial tyres for trucks. However, it does not include:
tyres whose nominal diameter of rims is not greater than 10 inches and nominal
diameter of rims is not less than 25 inches; T-type spare tyres for temporary use only;
ST metric tyres for road-type trailers, and radial tyres with high throughput for light
trucks; truck tyres with a speed capacity of less than 80 km/h (excluding); racing tyres,
studded tyres and special off-road tyres.

Basic Data

Standard ID	GB/T 29042-2020 (GB/T29042-2020)
Description (Translated English)	Thresholds and grading of rolling resistance for motor vehicle tyres
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G41
Classification of International Standard	83.160.10
Word Count Estimation	7,773
Date of Issue	2020-12-14
Date of Implementation	2021-11-01
Older Standard (superseded by this standard)	GB/T 29042-2012
Quoted Standard	GB/T 6326; GB/T 8170; GB/T 29040
Regulation (derived from)	National Standard Announcement No. 28 of 2020
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration
Summary	This standard specifies the terms and definitions for the limits and grades of the rolling resistance of automobile tires, the limits and grade requirements and test methods for the coefficients of rolling resistance. This standard is applicable to new radial car tires and new miniature and light truck radial tires and new truck radial tires. But it does not include: tires with a nominal wheel diameter of not more than 10 inches and a nominal rim diameter of not less than 25 inches; T-type spare tires for temporary use only; special ST metric tires for road trailers, and high-passing radial tires for light trucks ; Truck tires, racing tires, studded tires and special off-road tires with a speed capability of 80 km/h (not included).