The John Deere 6120E tractor tire size is front 12.4-24 and the rear is 16.9-30.
Front tire12.4-24
Rear tire16.9-30
Front/rear setupDifferent front and rear tire sizes
Tire pressure30 PSI, 14 PSI
Rim diameter24 in front, 30 in rear
John Deere 6120E Tire Size Details
Front tire size
12.4-24
Rear tire size
16.9-30
Front/rear setup
Different front and rear tire sizes
Original factory tire size
Front 420/85R28, Rear 650/65R38
Front tire construction
Bias/imperial tire
Rear tire construction
Bias/imperial tire
Front section width
12.4 in
Rear section width
16.9 in
Front rim diameter
24 in
Rear rim diameter
30 in
Tire pressure
30 PSI, 14 PSI
Tire size alternatives / conversions
420/85R30, 520/85R42, 16.9R30, 20.8R42
Tire Size Comparison Chart
Front rim diameter comparison
This model
24 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
30 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 6120E Extra Tire Notes
Tire size note
The John Deere 6120E uses different front and rear tire sizes in this data: front 12.4-24 (24 in rim, 12.4 in width) and rear 16.9-30 (30 in rim, 16.9 in width)
Pressure note
For the John Deere 6120E with front 12.4-24 and rear 16.9-30 tires, the pressure values captured in the answer are 30 PSI, 14 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 6120E data shows front 12.4-24 and rear 16.9-30. 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.
