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GB 14646-2007Retreaded tyres for passenger cars (English PDF)

轿车翻新轮胎

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Mandatory

Issue date

January 24, 2025

Implementation date

August 1, 2025

Scope

GB 14646-2007 is the English-translated version of 轿车翻新轮胎.

GB 14646-2007 — This document specifies the technical requirements, test methods and markings for retreaded passenger car tyres. This document applies to the retreading of pneumatic passenger car tyres.

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Document preview — GB 14646-2007

National Standard of the People's Republic of China

ICS: 83.160.10
Classification: G 41

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
4.1 Tire selection

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

This document replaces GB/T 14646-2007 "Passenger car retread tires". Compared with GB/T 14646-2007, except for structural adjustments and editing in addition to the changes in performance, the main technical changes are as follows.

--- Added some provisions for carcass sidewall marking for retreading (see 4.1.2);

--- Changed some requirements that should not be applied to retreaded tires (see 4.1.3, 4.1.3 of the 2007 edition);

--- Deleted the relevant requirements for retread carcass with perforation damage (see 4.1.4 of the 2007 edition);

--- Changed the relevant provisions on the inflation pressure of the carcass for inspection before and after retreading (see 4.2.2 and 4.3.1, 4.2.2 and 4.3.1 of the 2007 edition) 4.3.1);

--- Changed the outer edge size requirements after renovation (see 4.5, 4.5 of the 2007 edition);

--- Added low pressure test for retreaded tires (see 5.5);

--- Changed the relevant provisions on the markings that should be on retreaded tires (see 6.2, 6.2 of the 2007 edition).

1 Scope

This document specifies the technical requirements, test methods and markings for retreaded passenger car tyres.

This document applies to the retreading of pneumatic passenger car tyres.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 521 Method for measuring tire outer rim dimensions GB/T 2978 Specifications, dimensions, pressure and load of passenger car tires GB/T 4502 Passenger car tire performance indoor test method GB/T 6326 Tire Terminology GB 9743 Passenger car tires HG/T 2177 Tire Appearance Quality

3 Terms and definitions

The terms and definitions defined in GB/T 6326 apply to this document.

4 Technical requirements

4.1 Tire selection

4.1.1 A tyre that has been retreaded should not be retreaded again.

4.1.2 For retreaded tires, the sidewall markings shall include the following.

---Tire specifications;

---Speed symbol (or maximum driving speed);

---Load index (or maximum load capacity or level);

---"CCC" and other certification marks.

4.1.3 Tyres that meet any of the following conditions shall not be used for retreading.

---Production date exceeds 5 years;

---Speed symbol is less than or equal to L (120km/h);

---Obvious damage due to overload or lack of air;

---Carcass rupture or abnormal deformation;

---The tire bead is broken or damaged;

---Obvious corrosion by oil, chemicals or water;

---The tread is polished and the cord is exposed;

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

HG/T 4401-2012Technical specification for retreaded tyre production

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