GB/T 29042-2020Thresholds and grading of rolling resistance for motor vehicle tyres (English PDF)
汽车轮胎滚动阻力限值和等级
This is a limited preview
Buy now to download the full PDF (12 pages)
Need quotation for your management?
Get a formal quotation for GB/T 29042-2020 in 30 minutes.
Issued by
State Administration for Market Regulation; Standardization Administration of China
Level / Type
National · Recommended
Issue date
December 14, 2020
Implementation date
November 1, 2021
Scope
GB/T 29042-2020 is the English-translated version of 汽车轮胎滚动阻力限值和等级.
GB/T 29042-2020 is the Chinese standard "Thresholds and grading of rolling resistance for motor vehicle tyres". Its scope clause reads: 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. Its clauses include terms and definitions.
Found what you need?
Document preview — GB/T 29042-2020
National Standard of the People's Republic of China
- ICS
- 83.160.10
- Classification
- G 41
- Replacing
- GB/T 29042-2012
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword3
- 1 Scope5
- 2 Normative references5
- 3 Terms and definitions5
- 4 Thresholds and grading requirements of rolling resistance coefficient6
- 5 Test methods7
- laboratory8
1 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.
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 29040, Test methods of rolling resistance for motor vehicle tyres - Single point test and correlation of measurement results
3 Terms and definitions
Terms and definitions determined by GB/T 6326 and GB/T 29040, as well as the following ones, are applicable to this document.
3.1 professional off-road tyre
Tyres primarily designed for use in harsh off-road conditions. For passenger car tyres and miniature and light truck tyres with a single tyre load index of not more than 121 and a speed class of N and above, the groove depth of the pattern is not less than 11
Appendix A (Normative)
Establishment of the tyre rolling resistance test benchmark laboratory
A.1 Basic requirements
A.1.1 The technical conditions and equipment requirements of the comparison laboratory shall comply with the provisions of GB/T 29040.
A.1.2 The comparison laboratory shall monitor the equipment with control tyres for no less than 3 times a month in accordance with the provisions of GB/T 29040 to ensure that the test equipment meets the requirements.
A.1.3 The comparison laboratory shall pass the accreditation of the corresponding national laboratory and obtain the nationally recognized qualification certificate.
A.2 Establishment of the benchmark laboratory
A.2.1 The benchmark laboratory is established based on the test data of multiple comparison laboratories. Two benchmark laboratories shall be established, respectively for:
a) Test of rolling resistance of passenger car tyres and miniature and light truck tyres with a single tyre load index not greater than 121;
b) Test of rolling resistance of miniature and light truck tyres with a single tyre load index greater than 121 and truck tyres.
A.2.2 The relevant departments (third parties) shall be responsible for the establishment of the benchmark laboratory, and uniformly stipulate the quantity, requirements and serial number of the laboratory and confirm every two years.
A.2.3 The establishment unit of the benchmark laboratory is responsible for establishing the correlation between the benchmark laboratory and each comparison laboratory, and gives a correlation coefficient for each comparison laboratory, and publish the correlation coefficient every two years.
A.2.4 A set of calibration tyres shall be used for the establishment of each benchmark laboratory; each set of calibration tyres shall be at least 5 tyres of different specifications.
These tyres shall meet the following requirements:
a) The difference between the maximum value and the minimum value of the rolling resistance coefficient:
GB/T 30195 | GB/T 29041 | GB/T 29042 | […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 12 pages — is available in the English PDF.
Referenced standards
Normative references
Similar standards
Editions of GB/T 29042
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 29042-2020 | Thresholds and grading of rolling resistance for motor vehicle tyres | first revision | Current |
| GB/T 29042-2012 | Thresholds of rolling resistance for motor vehicle tyres | first issue | Superseded |
This page sells the current edition, GB/T 29042-2020. Earlier editions are listed for reference only.
How to Download GB/T 29042-2020
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 29040-2012 — Test methods of rolling resistance for motor vehicle tyres -- Single point test and correlation of measurement results
GB/T 6326-2023 — Tyre - Vocabulary
GB/T 8170-2008 — Rules of rounding off for numerical values & expression and judgement of limiting values
Secure payment via Stripe
Payments accepted
GB/T 29042-2020
$105.00