Quick answer:
The Kubota T1400 tractor tire size is front 14×5.00-6 and rear 18×8.50-8.
Front tire14×5.00-6
Rear tire18×8.50-8
Front/rear setupDifferent front and rear tire sizes
Rim diameter6 in front, 8 in rear
Ballast35 gal
Kubota T1400 Tire Size Details
| Front tire size | 14×5.00-6 |
|---|---|
| Rear tire size | 18×8.50-8 |
| Front/rear setup | Different front and rear tire sizes |
| Front tire construction | Flotation/implement tire |
| Rear tire construction | Flotation/implement tire |
| Front section width | 5 in |
| Rear section width | 8.5 in |
| Front rim diameter | 6 in |
| Rear rim diameter | 8 in |
| Approx front overall diameter | about 14 in |
| Approx rear overall diameter | about 18 in |
| 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 lawn/garden tractor category, not scraped low/high outliers.
Kubota T1400 Extra Tire Notes
| Tire size note | The Kubota T1400 uses different front and rear tire sizes in this data: front 14×5.00-6 (6 in rim, 5 in width) and rear 18×8.50-8 (8 in rim, 8.5 in width) |
|---|---|
| Ballast note | For the Kubota T1400 rear 18×8.50-8 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 T1400 data shows front 14×5.00-6 and rear 18×8.50-8. 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.






