The Kubota GB155 tractor tire size is front 5.00-12 and rear 8-18.
Front tire5.00-12
Rear tire8-18
Front/rear setupDifferent front and rear tire sizes
Tire pressure20.3 PSI, 21.8 PSI
Rim diameter12 in front, 18 in rear
Ballast35 gal
Kubota GB155 Tire Size Details
Front tire size
5.00-12
Rear tire size
8-18
Front/rear setup
Different front and rear tire sizes
Front tire construction
Bias/imperial tire
Rear tire construction
Bias/imperial tire
Front section width
5 in
Rear section width
8 in
Front rim diameter
12 in
Rear rim diameter
18 in
Tire pressure
20.3 PSI, 21.8 PSI
Loaded rear tire ballast / fluid capacity
35 gal
Tire Size Comparison Chart
Front rim diameter comparison
This model
12 in
Average
12 in
Low
8 in
High
16 in
Rear rim diameter comparison
This model
18 in
Average
16 in
Low
12 in
High
24 in
Benchmarks use typical low, average and high rim diameters for the sub-compact / compact tractor category, not scraped low/high outliers.
Kubota GB155 Extra Tire Notes
Tire size note
The Kubota GB155 uses different front and rear tire sizes in this data: front 5.00-12 (12 in rim, 5 in width) and rear 8-18 (18 in rim, 8 in width)
Pressure note
For the Kubota GB155 with front 5.00-12 and rear 8-18 tires, the pressure values captured in the answer are 20.3 PSI, 21.8 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Ballast note
For the Kubota GB155 rear 8-18 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 GB155 data shows front 5.00-12 and rear 8-18. 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.
