The Kubota M4063 tractor tire size is front 320/85R20 and rear 420/85R30.
Front tire320/85R20
Rear tire420/85R30
Front/rear setupDifferent front and rear tire sizes
Rim diameter20 in front, 30 in rear
Kubota M4063 Tire Size Details
Front tire size
320/85R20
Rear tire size
420/85R30
Front/rear setup
Different front and rear tire sizes
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
320 mm
Rear section width
420 mm
Front aspect ratio
85%
Rear aspect ratio
85%
Front rim diameter
20 in
Rear rim diameter
30 in
Approx front overall diameter
about 41.4 in
Approx rear overall diameter
about 58.1 in
Tire Size Comparison Chart
Front rim diameter comparison
This model
20 in
Average
18 in
Low
12 in
High
28 in
Rear rim diameter comparison
This model
30 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 M4063 Extra Tire Notes
Tire size note
The Kubota M4063 uses different front and rear tire sizes in this data: front 320/85R20 (20 in rim, 320 mm width) and rear 420/85R30 (30 in rim, 420 mm width)
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.
