Quick answer:
The Kubota M125A tractor tire size is front 14.9-24 and rear 18.4R38. Other tire setup data found for this model includes Front 14.9R24, Rear 18.4R38; Front 18.4-38, Rear 14.9-24; Front 18.4R38, Rear 14.9R24, so confirm the wheel option before ordering.
Front tire14.9-24
Rear tire18.4R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure20 PSI
Rim diameter24 in front, 38 in rear
Ballast35 gal
Other setup foundFront 14.9R24, Rear 18.4R38; Front 18.4-38, Rear 14.9-24; Front 18.4R38, Rear 14.9R24
Kubota M125A Tire Size Details
| Front tire size | 14.9-24 |
|---|---|
| Rear tire size | 18.4R38 |
| Front/rear setup | Different front and rear tire sizes |
| Other tire setup found | Front 14.9R24, Rear 18.4R38 |
| Replacement tire size | Front 18.4-38, Rear 14.9-24 |
| R1 ag tire size | Front 18.4R38, Rear 14.9R24 |
| Front tire construction | Bias/imperial tire |
| Rear tire construction | Imperial radial |
| Front section width | 14.9 in |
| Rear section width | 18.4 in |
| Front rim diameter | 24 in |
| Rear rim diameter | 38 in |
| Tire pressure | 20 PSI |
| Loaded rear tire ballast / fluid capacity | 35 gal |
Tire Size Comparison Chart
Front rim diameter comparison
Rear rim diameter comparison
Benchmarks use typical low, average and high rim diameters for the utility / row-crop / large ag tractor category, not scraped low/high outliers.
Kubota M125A Extra Tire Notes
| Tire size note | The Kubota M125A uses different front and rear tire sizes in this data: front 14.9-24 (24 in rim, 14.9 in width) and rear 18.4R38 (38 in rim, 18.4 in width) |
|---|---|
| Multiple setup note | This data has more than one tire setup for the Kubota M125A. The main front/rear listing is Front 14.9-24, Rear 18.4R38. Other setup data found: Front 14.9R24, Rear 18.4R38; Front 18.4-38, Rear 14.9-24; Front 18.4R38, Rear 14.9R24. This usually means different wheel, axle, turf/ag/industrial, or market options rather than one universal tire size |
| Pressure note | For the Kubota M125A with front 14.9-24 and rear 18.4R38 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 M125A rear 18.4R38 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 |
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.






