Issue link: http://read.dmtmag.com/i/34501
Overall Width Section Height Free Radius Rim Width Nominal Wheel Diameter 8. Loaded Radius 3. C L 12. Overall Diameter 4. 7. 5. CHANGES TO LOAD AND INFLATION PRESSURE FOR COMMERCIAL TRUCK TIRES 2003 DOT standards require that both metric and English load, pressure, and speed units be marked on tires. In order to meet this new requirement, Michelin changed its maximum load at cold inflation pressure markings to ensure alignment with standards published by TRA (The Tire and Rim Association, Inc.), ETRTO (European Tyre and Rim Technical Organisation), etc. All MICHELIN ® truck tires manufactured after January 9. Deflection All the information required to determine the proper tire size is contained in the application specific data books. A sample is shown below. To select the proper tire size for a vehicle, it is necessary to know the maximum axle wheel end loads that the tires will carry and the maximum continuous speed at which they will operate. The maximum load that a tire can carry is different if it is mounted in dual configuration rather than single. The allowable axle loads and the required inflation pressures to carry these loads are shown in the charts for both single and dual mountings in the MICHELIN ® Truck Tire Data Book (MWL40731). The maximum allowable continuous speed is also indicated. Specifications for Tread Design: MICHELIN XZA3 Max ® Overall Size 11R22.5 (1,2) Range Number Depth Load Catalog Tread Speed Loaded (*) Radius Overall Width Diameter (‡) 32nds mph in. mm. in. mm. in. mm. Approved Rims ® Min. Dual Revs Spacing (‡) per Mile in. mm. 1, 2002 (DOT week 0102) carry the new markings. Data books published since then reflect the changes in maximum loads at various cold pressures. The MICHELIN truck tire website, www.michelintruck.com, was also updated to reflect these changes. ALWAYS REFER TO THE ACTUAL SIDEWALL MARKINGS FOR MAXIMUM LOAD AT COLD INFLATION PRESSURE INFORMATION. There still may be some tires in our distribution channels with the old markings. During this period of transition, customers may receive tires with the same MSPN with different load and inflation markings. The guidelines below should be followed when mounting tires of the same size with different markings on the same vehicle. 1.Make sure the tire maximum load and cold inflation pressure markings do not exceed those of the wheel. 2. If tires with different maximum load markings are mixed across an axle, apply the lowest load and cold pressure markings to all tires. 3. Ensure that the tire markings are adequate to meet the vehicle GAWR (Gross Axle Weight Rating) for all axles. 2. Max. Tire Load Single Max. Tire Load Dual lbs. psi kg. kPa lbs. psi kg. kPa G 73162 19 75 19.3 489 41.3 1048 11.1 283 8.25, 7.50 12.5 318 502 6175 105 2800 720 5840 105 2650 720 275/80R22.5(1,2) G 73146 19 75 18.6 473 40.1 1018 10.9 277 8.25, 7.50 12.2 311 518 6175 110 2800 760 5675 110 2575 760 275/80R22.5 LRG: MICHELIN XZA3 PSI kPa ® 70 480 LBS KG SINGLE DUAL SINGLE DUAL 9000 16380 4080 7440 75 520 9450 80 550 9880 4480 8240 85 590 10310 17200 18160 18760 4280 7800 4680 8520 Note: Rim listed first is the measuring rim. (1) Directional tread design. (2) 7/7/3 Manufacturing Limited Casing Warranty: 700,000 miles, 7 years, or 3 retreads for MICHELIN XZA3 , XZA3 Antisplash, XDA3 , and XDA Energy tires only. See limited warranty for details. ® ® ® ™ ® (*) Exceeding the lawful speed limit is neither recommended nor endorsed. (‡) Overall widths will change 0.1 inch (2.5 mm) for each 1/4 inch change in rim width. Minimum dual spacing should be adjusted accordingly. MICHELIN ® tires and tubes are subject to a continuous development program. Michelin North America, Inc. reserves the right to change product specifications at any time without notice or obligation. Please consult rim manufacturer’s load and inflation limits. Never exceed rim manufacturer’s limits without permission of component manufacturer. Section One: Tire Selection 7 ® 90 620 95 660 100 690 10740 11020 11560 19540 20280 21040 4880 8880 5000 9200 5240 9560 105 720 110 760 11960 12350 21760 22700 5420 9880 5600 10300 S MAXIMUM LOAD AND PRESSURE ON SIDEWALL 6175 LBS at 110 PSI D 5675 LBS at 110 PSI S 2800 KG at 760 kPa D 2575 KG at 760 kPa