The John Deere 6M 155 tractor tire size is front 420/85R28 and the rear is 480/80R42.
Front tire420/85R28
Rear tire480/80R42
Front/rear setupDifferent front and rear tire sizes
Tire pressure20 PSI
Rim diameter28 in front, 42 in rear
John Deere 6M 155 Tire Size Details
Front tire size
420/85R28
Rear tire size
480/80R42
Front/rear setup
Different front and rear tire sizes
Replacement tire size
Front 320/85R34, Rear 460/85R42
R1 ag tire size
320/85R34, 460/85R42
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
420 mm
Rear section width
480 mm
Front aspect ratio
85%
Rear aspect ratio
80%
Front rim diameter
28 in
Rear rim diameter
42 in
Approx front overall diameter
about 56.1 in
Approx rear overall diameter
about 72.2 in
Tire pressure
20 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
28 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
42 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 6M 155 Extra Tire Notes
Tire size note
The John Deere 6M 155 uses different front and rear tire sizes in this data: front 420/85R28 (28 in rim, 420 mm width) and rear 480/80R42 (42 in rim, 480 mm width)
Pressure note
For the John Deere 6M 155 with front 420/85R28 and rear 480/80R42 tires, the pressure values captured in the answer are 20 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Front/rear matching note
The John Deere 6M 155 data shows front 420/85R28 and rear 480/80R42. When changing either size, front/rear rolling circumference and lead/lag need to stay within the correct range
Official information note
Mistakes do happen. Tire sizes can change by year, axle, wheel/rim option, tyre brand, tread type and local market. Please check the tire sidewall, operator manual and official deere.com website for official information.
