The John Deere 45C tractor tire size is front 240/40R16 and the rear is 320/70R24.
Front tire240/40R16
Rear tire320/70R24
Front/rear setupDifferent front and rear tire sizes
Tire pressure35 PSI, 18 PSI
Rim diameter16 in front, 24 in rear
John Deere 45C Tire Size Details
Front tire size
240/40R16
Rear tire size
320/70R24
Front/rear setup
Different front and rear tire sizes
R1 ag tire size
12.4-24, 8-16
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
240 mm
Rear section width
320 mm
Front aspect ratio
40%
Rear aspect ratio
70%
Front rim diameter
16 in
Rear rim diameter
24 in
Approx front overall diameter
about 23.6 in
Approx rear overall diameter
about 41.6 in
Tire pressure
35 PSI, 18 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
16 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
24 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 45C Extra Tire Notes
Tire size note
The John Deere 45C uses different front and rear tire sizes in this data: front 240/40R16 (16 in rim, 240 mm width) and rear 320/70R24 (24 in rim, 320 mm width)
Pressure note
For the John Deere 45C with front 240/40R16 and rear 320/70R24 tires, the pressure values captured in the answer are 35 PSI, 18 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 45C data shows front 240/40R16 and rear 320/70R24. 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.
