The Kubota ST-30 tractor tire size is front 6.00-12 and rear 9.5-22. Other tire setup data found for this model includes Front 8.3-16, Rear 14.9-24, so confirm the wheel option before ordering.
Front tire6.00-12
Rear tire9.5-22
Front/rear setupDifferent front and rear tire sizes
Tire pressure14 PSI, 17 PSI
Rim diameter12 in front, 22 in rear
Ballast35 gal
Other setup foundFront 8.3-16, Rear 14.9-24
Kubota ST-30 Tire Size Details
Front tire size
6.00-12
Rear tire size
9.5-22
Front/rear setup
Different front and rear tire sizes
R1 ag tire size
Front 8.3-16, Rear 14.9-24
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
12 in
Rear rim diameter
22 in
Tire pressure
14 PSI, 17 PSI
Loaded rear tire ballast / fluid capacity
35 gal
Tire Size Comparison Chart
Front rim diameter comparison
This model
12 in
Average
18 in
Low
12 in
High
28 in
Rear rim diameter comparison
This model
22 in
Average
28 in
Low
18 in
High
38 in
Benchmarks use typical low, average and high rim diameters for the compact / utility tractor category, not scraped low/high outliers.
Kubota ST-30 Extra Tire Notes
Tire size note
The Kubota ST-30 uses different front and rear tire sizes in this data: front 6.00-12 (12 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 ST-30. The main front/rear listing is Front 6.00-12, Rear 9.5-22. Other setup data found: Front 8.3-16, Rear 14.9-24. This usually means different wheel, axle, turf/ag/industrial, or market options rather than one universal tire size
Pressure note
For the Kubota ST-30 with front 6.00-12 and rear 9.5-22 tires, the pressure values captured in the answer are 14 PSI, 17 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Ballast note
For the Kubota ST-30 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
Front/rear matching note
The Kubota ST-30 data shows front 6.00-12 and rear 9.5-22. 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.
