The Kubota GT-21 tractor tire size is front 6-14 and rear 9.5-22. Other tire setup data found for this model includes Front 6-14, Rear 9.5-24; Front 6-14, Rear 8.3-24; Front 8.3-24, Rear 6-14, so confirm the wheel option before ordering.
Front tire6-14
Rear tire9.5-22
Front/rear setupDifferent front and rear tire sizes
Tire pressure12 PSI, 20 PSI
Rim diameter14 in front, 22 in rear
Ballast35 gal
Other setup foundFront 6-14, Rear 9.5-24; Front 6-14, Rear 8.3-24; Front 8.3-24, Rear 6-14
Kubota GT-21 Tire Size Details
Front tire size
6-14
Rear tire size
9.5-22
Front/rear setup
Different front and rear tire sizes
Other tire setup found
Front 6-14, Rear 9.5-24
Replacement tire size
Front 6-14, Rear 8.3-24
Tire size alternatives / conversions
Front 8.3-24, Rear 6-14
Front tire construction
Bias/imperial tire
Rear tire construction
Bias/imperial tire
Front section width
6 in
Rear section width
9.5 in
Front rim diameter
14 in
Rear rim diameter
22 in
Tire pressure
12 PSI, 20 PSI
Loaded rear tire ballast / fluid capacity
35 gal
Tire Size Comparison Chart
Front rim diameter comparison
This model
14 in
Average
7 in
Low
6 in
High
10 in
Rear rim diameter comparison
This model
22 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 GT-21 Extra Tire Notes
Tire size note
The Kubota GT-21 uses different front and rear tire sizes in this data: front 6-14 (14 in rim, 6 in width) and rear 9.5-22 (22 in rim, 9.5 in width)
Multiple setup note
This data has more than one tire setup for the Kubota GT-21. The main front/rear listing is Front 6-14, Rear 9.5-22. Other setup data found: Front 6-14, Rear 9.5-24; Front 6-14, Rear 8.3-24; Front 8.3-24, Rear 6-14. This usually means different wheel, axle, turf/ag/industrial, or market options rather than one universal tire size
Pressure note
For the Kubota GT-21 with front 6-14 and rear 9.5-22 tires, the pressure values captured in the answer are 12 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 GT-21 rear 9.5-22 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.
