The Kubota M125GX-IV tractor tire size is front 420/70R24 and rear 520/70R38.
Front tire420/70R24
Rear tire520/70R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure20 PSI
Rim diameter24 in front, 38 in rear
Ballast35 gal
Kubota M125GX-IV Tire Size Details
Front tire size
420/70R24
Rear tire size
520/70R38
Front/rear setup
Different front and rear tire sizes
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
420 mm
Rear section width
520 mm
Front aspect ratio
70%
Rear aspect ratio
70%
Front rim diameter
24 in
Rear rim diameter
38 in
Approx front overall diameter
about 47.1 in
Approx rear overall diameter
about 66.7 in
Tire pressure
20 PSI
Loaded rear tire ballast / fluid capacity
35 gal
Tire Size Comparison Chart
Front rim diameter comparison
This model
24 in
Average
24 in
Low
16 in
High
38 in
Rear rim diameter comparison
This model
38 in
Average
38 in
Low
28 in
High
54 in
Benchmarks use typical low, average and high rim diameters for the utility / row-crop / large ag tractor category, not scraped low/high outliers.
Kubota M125GX-IV Extra Tire Notes
Tire size note
The Kubota M125GX-IV uses different front and rear tire sizes in this data: front 420/70R24 (24 in rim, 420 mm width) and rear 520/70R38 (38 in rim, 520 mm width)
Pressure note
For the Kubota M125GX-IV with front 420/70R24 and rear 520/70R38 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
Ballast note
For the Kubota M125GX-IV rear 520/70R38 tires, the ballast figure captured in the answer is 35 gal. Liquid ballast capacity can change by tire brand, fill percentage, wheel setup and ballast fluid type
Front/rear matching note
The Kubota M125GX-IV data shows front 420/70R24 and rear 520/70R38. 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 kubotausa.com website for official information.
