Issue link: https://read.dmtmag.com/i/41477
Appendix FRONT AXLE OVERLOAD ON AUTO HAULERS Recent studies by Michelin's Customer Engineering Support have shown that Auto Haulers may sometimes exceed the designed load capacity of the front axle tires either across the axle or at one of the two axle ends. Improper positioning of the top front loaded vehicle or positioning of heavier than intended vehicles in the top front position contribute to overload conditions. 275/70R22.5 LRJ MICHELIN® 275/70R22.5 XZE® 2+ and MICHELIN® XZA2® Energy LRJ truck tires have a maximum single tire load of 6,940 lbs at 130 psi with a maximum speed rating of 75 mph(1). See Load and Inflation table below.(3) Overloading the 275/70R22.5 LRJ tires (or any highway tire) and/or exceeding the speed rating of the tire is dangerous and may lead to tire failure. Specifications for 275/70R22.5 MICHELIN® Overall Size 275/70R22.5 XZE2+ Range J 275/70R22.5 XZA2 ENERGY J 7.50", 8.25" Wheel, Max Speed 75 mph(1) 275/70R22.5 LRJ XZE2+, XZA2 ENERGY Load Catalog Number 78395 90059 Tread Depth Max. Speed (1) 32nds mph 19 18 Loaded Radius Diameter XZE® 2+ and MICHELIN® Overall Width (2) in. mm in. mm in. mm 75 17.6 448 38.0 966 10.9 276 75 17.6 448 38.0 966 10.9 277 Load and Inflation Table for 275/70R22.5 MICHELIN® PSI 85 kPa 590 90 620 95 660 100 690 Approved Wheels (Measuring wheel listed first.) 7.50, 8.25 7.50, 8.25 XZE® 105 720 Min. Dual Spacing (2) in mm XZA2® Revs Per Mile lbs. ENERGY LRJ Max. Load and Pressure Single psi kg. kPa Max. Load and Pressure Dual lbs. psi kg. kPa 11.9 303 545 6940 130 3150 900 6395 120 2900 830 11.9 303 545 6940 130 3150 900 6395 120 2900 830 110 760 2+ and MICHELIN® 115 790 120 830 19420 20320 21220 22100 22980 23860 24720 25580 125 860 XZA2® 130 900 ENERGY LRJ (3) MAXIMUM LOAD AND PRESSURE ON SIDEWALL LBS SINGLE 9880 10340 10800 11250 11700 12140 12580 13020 13460 13880 S 6940 LBS AT 130 PSI LBS DUAL KG SINGLE KG DUAL 4480 4690 4900 5100 5310 5510 5710 5900 6080 6300 S 3150 KG AT 900 kPa 8810 9220 9630 10020 10420 10820 11210 11600 If an Auto Hauler cannot ensure that the front axle ends were loaded within the limit of the 275/70R22.5 LRJ, the tires should be assumed to have been overloaded, and must be removed and scrapped. 295/60R22.5 LRJ The recommended alternative fitment for the 275/70R22.5 LRJ is the 295/60R22.5 MICHELIN® Specifications for 295/60R22.5 MICHELIN® Load Size Range 295/60R22.5 XZA2 ENERGY J Catalog Number 33215 Tread Depth Max. Speed (1) 32nds mph 16 Loaded Radius Diameter Overall XZA2® Overall ENERGY Width (2) in. mm in. mm in. mm 65 (5) 16.7 424 36.1 918 11.4 290 Load and Inflation Table for 295/60R22.5 MICHELIN® wheel, maximum speed 65 mph 9.00" Wheel, Max Speed 65 mph(1) 295/60R22.5 LRJ XZA2 ENERGY PSI kPa 85 590 90 620 95 660 100 690 105 720 Approved Wheels (Measuring wheel listed first.) 9.00 (4) XZA2® 110 760 Min. Dual Spacing (2) in mm Revs Per Mile Max. Load and Pressure Single lbs. psi kg. kPa Max. Load and Pressure Dual lbs. psi kg. kPa 13.0 329 575 7390 130 3350 900 6780 130 3075 900 ENERGY LRJ for use on an 9.00 x 22.5" 115 790 120 830 125 860 130 900 MAXIMUM LOAD AND PRESSURE ON SIDEWALL LBS SINGLE 10520 11010 11500 11980 12460 12930 13400 13860 14320 14780 S 7390 LBS AT 130 PSI LBS DUAL KG SINGLE KG DUAL 19300 20200 21100 21980 22860 23720 24580 25440 26280 27120 D 6780 LBS AT 130 PSI 4770 4990 5220 5430 5650 5860 6080 6290 6460 6700 S 3350 KG AT 900 kPa 8750 9160 9570 9970 10370 10760 11150 11540 11880 12300 D 3075 KG AT 900 kPa (1) Exceeding the legal speed limit is neither recommended nor endorsed. (2) Overall widths will change 0.1 inch (2.5 mm) for each 1/4 inch change in wheel width. Minimum dual spacing should be adjusted accordingly. (3) If used on wheels with 120 psi cold ratings the maximum load/tire in single mount is limited to 6,510 lb/tire. (4) See Page 93 for use on 8.25 x 22.5" wheel. (5) See Page 93 for use at 75 mph maximum speed. 94 XZA2® Energy LRJ tire MSPN 33215. D 2900 KG AT 830 kPa D 6395 LBS AT 120 PSI (3)