Metric | English
520/85R42 (20.8R42) TL 157A8/157B Agribib
MSPN 63687 CAI 122791
Tire Technical Data
Unloaded Dimensions Loaded Dimensions Rims (rec. in bold)
Overall Width Overall Diameter Loaded Radius Rolling Circumference DW18A
DW18A
18DD
W18A
DD18
21.2 in 76.6 in 34.2 in 227.2 in
RCI # of Lugs Tube MSPN Tube CAI
47 22 x 2 75465 170006
Gross Flat Plate Tire Weight 100% Tire Volume Centerline Tread Depth Minimum Dual / Triple Spacing
468.7 in² 460.8 lb 195.5 gal 74 /32nd" 27.3 in
Load & Inflation Data
Load Per Tire (Single)
30 mph 25 mph 20 mph 05 mph 25 Dual  6 Cyc  Inflation Pressure
- - 4,410 lbs 6,170 lbs 3,590 lbs 6,170 lbs 6 psi
4,940 lbs 4,940 lbs 5,200 lbs 7,110 lbs 4,340 lbs 7,110 lbs 9 psi
5,680 lbs 5,680 lbs 6,170 lbs 8,050 lbs 4,990 lbs 8,050 lbs 11 psi
6,610 lbs 6,530 lbs 7,000 lbs 8,980 lbs 5,750 lbs 8,980 lbs 14 psi
7,390 lbs 7,390 lbs 7,830 lbs 9,920 lbs 6,500 lbs 9,920 lbs 17 psi
8,250 lbs 8,250 lbs 8,730 lbs 10,800 lbs 7,250 lbs 10,800 lbs 20 psi
9,100 lbs 9,100 lbs 9,650 lbs 11,690 lbs 8,000 lbs 11,690 lbs 23 psi
- - - 12,310 lbs - 12,310 lbs 24 psi
- - - 12,930 lbs - 12,930 lbs 26 psi
- - - 13,560 lbs - 13,560 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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