GB/T 29041-2023 PDF EnglishUS$380.00 · In stock · Download in 9 seconds
GB/T 29041-2023: Road wear testing methods for motor vehicle tyres Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 29041: Historical versions
Similar standardsGB/T 29041-2023: Road wear testing methods for motor vehicle tyres---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT29041-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.160.10 CCS G 41 Replacing GB/T 29041-2012 Road wear testing methods for motor vehicles tyres ISSUED ON: DECEMBER 28, 2023 IMPLEMENTED ON: JULY 01, 2024 Issued by: State Administration for Market Regulation; National Standardization Administration. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Test equipment and its requirements ... 6 5 Test method ... 7 6 Test record and transposition diagram ... 12 Appendix A (Informative) Road wear test record table and transposition diagram of passenger car tyres ... 13 Appendix B (Informative) Record sheet and transposition diagram for road wear test of micro/light truck tyre ... 16 Appendix C (Informative) Record sheet and transposition diagram for road wear test of truck tyre ... 20 References ... 26 Road wear testing methods for motor vehicles tyres1 ScopeThis document describes the test method for testing the road wear performance of automobile tyres, including test equipment and its requirements, test records, transposition diagrams. This document is applicable to the wear comparison test of new passenger car's pneumatic tyres, micro/light truck's pneumatic tyres, truck pneumatic tyres and their retreaded tyres.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in the text. For reference documents with dates, only the versions corresponding to the dates apply to this document; for reference documents without dates, the latest versions (including all amendments) apply to this document. GB/T 521 Test methods for measuring peripheral dimensions of tyres GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres GB/T 2978 Size designation, dimensions, inflation pressure and load capacity for passenger car tyres GB/T 3730.1 Terms and definitions of motor vehicles, trailers and combination vehicle - Part 1: Types GB/T 3730.3 Motor vehicles and towed vehicles - Dimensions of vehicles - Terms and definitions GB/T 6326 Tyre - Vocabulary GB/T 7037 Truck retread tyres GB 9743 Passenger car tyres GB 9744 Truck tyres GB/T 14646 Retreaded tyre for passenger car accuracy of ±5 kPa. 4.4 Wheel load meter or other mass measuring instrument, which has an accuracy of ±5 kg. 4.5 Dynamic balancing machine, which has an accuracy of ±5 g. 4.6 Tread depth gauge or other tread depth measuring instrument, which has an accuracy of ±0.02 mm. 4.7 Vehicle GPS positioning system.5 Test method5.1 Passenger car tyres 5.1.1 Test tyre requirements 5.1.1.1 New tyres for testing shall meet the safety performance requirements specified in GB 9743. 5.1.1.2 Retreaded tyres for testing shall meet the safety performance requirements specified in GB/T 14646. 5.1.1.3 The rubber residue on the tyre tread (air vent rubber column, flash) should be removed and trimmed for the test tyres. 5.1.2 Selection of test road The test road can be selected according to the test purpose. 5.1.3 Test vehicle requirements 5.1.3.1 The manufacturers and models of vehicles in the same convoy shall be the same; they shall have the same drive system, brake system, suspension system. 5.1.3.2 The load carried by each tyre for the test shall be 60% ~ 70% of the load capacity specified in GB/T 2978 or relevant industry technical documents. 5.1.3.3 After the vehicle is loaded as required, it shall be parked for at least 24 hours. If the suspension system is abnormal during this period, the vehicle cannot be used for testing. 5.1.3.4 Before starting the test, the test vehicle shall be subjected to complete maintenance. If any abnormality is found, it shall be recorded and corrected, to ensure the normal operation of the vehicle. 5.1.3.5 After each tyre trans-position and before the test, the test vehicle shall be subjected to daily maintenance. If any abnormality is found, it shall be recorded and corrected, to ensure the normal operation of the vehicle. 5.1.3.6 Test tyres of the same brand, specification, structure, pattern shall be installed on the same axle of the test vehicle. 5.1.3.7 Install the test tyre on the rim specified in GB/T 2978 or relevant industry technical documents; inflate it. The inflation pressure of standard tyres is 250 kPa ± 5 kPa; the inflation pressure of reinforced tyres is 290 kPa ± 5 kPa. 5.1.3.8 Before each test after transposition, the tyre-rim assembly shall be subjected to dynamic balancing test; the balance block shall be re-adjusted and recorded. 5.1.4 Test procedure 5.1.4.1 The total test mileage should be 25500 km ± 30 km (the first 1500 km is the running-in period). After the running-in period, transposition should be performed according to 5.1.4.3 every 3000 km ± 30 km. 5.1.4.2 The tread depth shall be measured according to GB/T 521 before the test, after running-in, and at each transposition. 5.1.4.3 The test tyre transposition should be in a rear cross pattern, that is, the tyre on the front axle of the test vehicle shall be trans-positioned to the wheel position on the other side of the rear axle of the vehicle; the tyre on the rear axle shall be trans- positioned to the front axle on the same side of the next vehicle in the convoy; the tyre on the rear axle of the last test vehicle in the convoy shall be trans-positioned to the front axle on the same side of the first test vehicle in the convoy. If there is only one test vehicle, the tyre transposition is only performed on this vehicle during the entire test. The test vehicles shall maintain the same order in the convoy during the entire test. 5.1.4.4 The test vehicle shall travel at a speed of 0 km/h ~ 120 km/h, of which at least 45% of the distance shall be traveled at a speed of 60 km/h ~ 120 km/h. The test vehicles in the same convoy shall travel on the same route and at the same speed as much as possible. 5.2 Micro/light truck tyres 5.2.1 Test tyre requirements 5.2.1.1 New tyres for testing shall meet the safety performance requirements specified in GB 9744. 5.2.1.2 The retreaded tyres used for the test shall meet the safety performance requirements specified in GB/T 7037. 5.2.4.3 The transposition of the test tyres should be rear cross, that is, the tyres on the front axle of the test vehicle shall be trans-positioned to the wheel position on the other side of the rear axle of the vehicle; the tyres on the rear axle shall be trans-positioned to the front axle on the same side of the next vehicle in the convoy; the tyres on the rear axle of the last test vehicle in the convoy shall be trans-positioned to the front axle on the same side of the first test vehicle in the convoy. If there is only one test vehicle, the tyre transposition will be carried out only on that vehicle during the entire test. The test vehicles shall maintain the same order in the convoy during the entire test. 5.2.4.4 The test vehicle shall travel at a speed of 0 km/h ~ 120 km/h, of which at least 45% of the distance shall be traveled at a speed of 60 km/h ~ 120 km/h. Test vehicles in the same convoy shall travel on the same route and at the same speed as far as possible. 5.3 Truck tyres 5.3.1 Test tyre requirements 5.3.1.1 New tyres for testing shall meet the safety performance requirements specified in GB 9744. 5.3.1.2 The retreaded tyres used for the test shall meet the safety performance requirements specified in GB/T 7037. 5.3.1.3 The rubber residue on the tyre tread (air vent rubber column, flash) etc. should be removed and trimmed for the test tyres. 5.3.2 Test road The test road can be selected according to the purpose of the test. 5.3.3 Test vehicle requirements 5.3.3.1 The vehicles in the same convoy shall be of the same manufacturer and model; they shall have the same drive system, brake system, suspension system. 5.3.3.2 The vehicle used for the test shall be rear-wheel drive. Ordinary trucks or semi- trailer tractors and semi-trailers shall be used as test vehicles. If a semi-trailer tractor is used for the test, the test vehicle shall have the same or similar wheelbase, suspension, drive system; the semi-trailers used shall be the same. When the test vehicle is equipped with dual tyres, the test tyres shall be installed on the outer tyre position. The load on each wheel shall be 90% ~ 95% of the maximum load of a single tyre, which is specified in GB/T 2977 or relevant industry technical documents. 5.3.3.3 After the test vehicle is loaded as required, it shall be parked for at least 24 hours. If the suspension system is abnormal during this period, the vehicle cannot be used for testing. 5.3.3.4 Before starting the test, the test vehicle shall be subjected to complete maintenance. If any abnormality is found, it shall be recorded and corrected, to ensure the normal operation of the vehicle. 5.3.3.5 After each tyre transposition and before the test, the test vehicle shall be subjected to daily maintenance. If any abnormality is found, it shall be recorded and corrected, to ensure the normal operation of the vehicle. 5.3.3.6 Test tyres of the same brand, specification, structure, pattern shall be installed on the same axle of the test vehicle. 5.3.3.7 Install the test tyre on the rim specified in GB/T 2977 or relevant industry technical documents; inflate it according to the inflation pressure corresponding to the maximum load of a single tyre. 5.3.3.8 Before each test after transposition, the tyre-rim assembly shall be subjected to a dynamic balance test; the balance block shall be re-adjusted and recorded. 5.3.4 Test procedure 5.3.4.1 The total test mileage should be 52500 km ± 30 km (the first 2500 km is the running-in period). After the running-in period, transposition shall be performed according to 5.3.4.3 every 5000 km ± 30 km. 5.3.4.2 The tread depth shall be measured according to GB/T 521 before the start of the test, after the running-in period, and at each transposition. 5.3.4.3 The test tyre on the driving axle can only be trans-positioned between the driving axles; the test tyre on the driven axle can only be trans-positioned between the driven axles. Each test tyre shall be trans-positioned to a different wheel position on the same functional axle during each tyre transposition period of the test; each test tyre shall be trans-positioned to a different wheel position on the same functional axle at the end of each specified transposition period. The transposition form should be rear cross rotation form, that is, the tyre on the front axle of the test vehicle shall be trans-positioned to the wheel position on the other side of the rear axle of the vehicle, the tyre on the rear axle shall be trans-positioned to the front axle of the same functional axle on the same side of the next vehicle in the queue; the tyre on the rear axle of the last test vehicle in the convoy shall be trans-positioned to the front axle of the same functional axle on the same side of the first test vehicle in the convoy. If there is only one test vehicle, the tyre transposition is only performed on this vehicle during the entire test. The convoy shall maintain the same order during the entire test process. 5.3.4.4 The test vehicle shall travel at a speed of 0 km/h ~ 100 km/h, of which at least 60% of the distance shall be traveled at a speed of 40 km/h ~ 100 km/h. The test vehicles in the same convoy shall travel on the same route and at the same speed as much as possible. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 29041-2023 be delivered?Answer: The full copy PDF of English version of GB/T 29041-2023 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 29041-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 29041-2023_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 29041-2023 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 29041-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 29041-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 29041-2023?A step-by-step guide to download PDF of GB/T 29041-2023_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 29041-2023". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
