The Kubota ZD331 tractor tire size is front 26×12-12 and rear 26×12-12. Other tire setup data found for this model includes Front 15×6.0-6, Rear 26×12.0-12, so confirm the wheel option before ordering.
Front tire26×12-12
Rear tire26×12-12
Front/rear setupSame front and rear tire size
Tire pressure30 PSI, 20 PSI
Rim diameter12 in front/rear
Ballast55 gal
Other setup foundFront 15×6.0-6, Rear 26×12.0-12
Kubota ZD331 Tire Size Details
Front tire size
26×12-12
Rear tire size
26×12-12
Front/rear setup
Same front and rear tire size
Other tire setup found
Front 15×6.0-6, Rear 26×12.0-12
Tire construction
Flotation/implement tire
Section width
12 in
Rim diameter
12 in
Approx overall diameter
about 26 in
Tire pressure
30 PSI, 20 PSI
Loaded rear tire ballast / fluid capacity
55 gal
Tire Size Comparison Chart
Front rim diameter comparison
This model
12 in
Average
7 in
Low
6 in
High
10 in
Rear rim diameter comparison
This model
12 in
Average
10 in
Low
8 in
High
12 in
Benchmarks use typical low, average and high rim diameters for the lawn/garden tractor category, not scraped low/high outliers.
Kubota ZD331 Extra Tire Notes
Tire size note
The Kubota ZD331 uses 26×12-12 on both the front and rear in this data, so the same tire-size details apply to both axles: flotation/implement tire, 12 in section width, 12 in rim, approx 26 in overall diameter
Multiple setup note
This data has more than one tire setup for the Kubota ZD331. The main front/rear listing is Front 26×12-12, Rear 26×12-12. Other setup data found: Front 15×6.0-6, Rear 26×12.0-12. This usually means different wheel, axle, turf/ag/industrial, or market options rather than one universal tire size
Pressure note
For the Kubota ZD331 with front 26×12-12 and rear 26×12-12 tires, the pressure values captured in the answer are 30 PSI, 20 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Ballast note
For the Kubota ZD331 rear 26×12-12 tires, the ballast figure captured in the answer is 55 gal. Liquid ballast capacity can change by tire brand, fill percentage, wheel setup and ballast fluid type
Front/rear matching note
The Kubota ZD331 data shows the same tire size front and rear (26×12-12). That usually makes the visible front/rear size relationship simpler, but approved tire and wheel combinations should still be checked before mixing brands or changing sizes
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.
