Metric | English
580/70R26 TL 149A8/146B XM27 Large Volume
MSPN 49571 CAI 123878
Tire Technical Data
Unloaded Dimensions Loaded Dimensions Rims (rec. in bold)
Overall Width Overall Diameter Loaded Radius Rolling Circumference DW18L
DW16L
W18L
23.2 in 56.5 in 24.8 in 169.3 in
RCI # of Lugs Tube MSPN Tube CAI
41 18 x 2 53712 170047
Gross Flat Plate Tire Weight 100% Tire Volume Centerline Tread Depth Minimum Dual / Triple Spacing
538.9 in² 275.6 lb 137.4 gal 55 /32nd" 29.3 in
Load & Inflation Data
Load Per Tire (Single)
25 mph 20 mph 15 mph 05 mph 6 Cyc  Inflation Pressure
- 4,300 lbs - 5,490 lbs 5,490 lbs 7 psi
4,650 lbs 4,610 lbs 5,160 lbs 5,860 lbs 5,860 lbs 9 psi
5,160 lbs 5,210 lbs 5,720 lbs 6,610 lbs 6,610 lbs 11 psi
5,660 lbs 5,830 lbs 6,280 lbs 7,380 lbs 7,380 lbs 14 psi
6,160 lbs 6,450 lbs 6,840 lbs 8,120 lbs 8,120 lbs 17 psi
6,660 lbs 7,060 lbs 7,400 lbs 8,870 lbs 8,870 lbs 20 psi
7,170 lbs 7,670 lbs 7,960 lbs 9,640 lbs 9,640 lbs 23 psi
- - - 10,010 lbs 10,010 lbs 24 psi
- - - 10,390 lbs 10,390 lbs 26 psi
- - - 10,760 lbs 10,760 lbs 27 psi
General Notes Pertaining To Load and Inflation Data Above
  • Load Values given at 6 psi for 25 mph and 30 mph are for calculating dual and triple load values only.
  • All load values are for maximum indicated speeds at low torque.
  • 20 mph load values also apply for low-speed high-torque field work.
  • High-Speed Cyclic (HS Cyclic) load-pressure data applies to low-torque spreading or spraying at field operating speeds up to 20 mph. Additional bonus loads permitted for this type application assume a rapid decrease from full to empty, where max load at max speed (20 kph) does not occur more than 15% of any work day.
  • Cyclic load-pressure data applies to low-torque harvesting type applications at field operating speeds up to 6 mph. Additional bonus loads permitted for cyclic applications assume a gradual load increase with unloading in the field.
  • Load & Carry load-pressure data applies to low-torque transport operations at max speeds of 6 mph for a max distance of 650 yards before discharging load and returning empty.
  • All load-speed-pressure data is valid for ground slopes up to and including 20%. When operating on slopes greater than 20%, please contact Michelin.
  • For moldboard plowing with single drive tires in the furrow, a minimum inflation pressure of 10 psi is required.
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