FieldSpec
Equipment menu

Machine models

Kubota B2350 to KB21X specifications

Entries in this reference
Listing-entry count
4
Short answer

Kubota B2350 to KB21X: tractors.

Selected configuration figures
ConfigurationDocumented field and quantity
B2350
Rated Power (net)
20.4 hp
Weight
Lower
1664 lb
Upper
2238 lb
B2401
Power (gross)
21.9 hp
Weight
1,521 lb
B2530
Rated Power (net)
21.6 hp
Weight
Lower
1598 lb
Upper
2116 lb
KB21X
Power
20.7 hp
Weight
Lower
1554 lb
Upper
1951 lb
B2350 to KB21X specification matrix — Listing labels reported by the source
Publisher nameSource guideListing-entry countLabels named by the source
KubotaB2350 to KB21X4B2350, B2401, B2530, and KB21X
Engine
SpecificationB2350B2401B2530
Fuel tank7.1 gal6.1 gal7.4 gal
SpecificationB2350B2401B2530KB21X
EngineKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl diesel
SpecificationKB21X
ROPS Fuel tank7.1 gal
Cab Fuel tank5.6 gal
Transmissions
SpecificationB2350B2530KB21X
Transmissions9-speed mechanical shuttle; hydrostatic9-speed mechanical shuttle; hydrostatic9-speed; 36-speed power shift
Power
SpecificationB2350B2401B2530
Engine (gross)22.7 hp21.9 hp24.7 hp
SpecificationB2350B2530
Engine (net)20.4 hp21.6 hp
Gear PTO (claimed)17.4 hp19.7 hp
Hydro PTO (claimed)16.8 hp18.8 hp
SpecificationB2401
PTO (claimed)19.2 hp
SpecificationKB21X
Engine20.7 hp
Mechanical
SpecificationB2350B2401B2530
Differential lockmechanical rearmechanical rearmechanical rear
SpecificationB2350B2401B2530KB21X
MechanicalFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioningFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPSFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioningFour-wheel drive; Power steering; Mechanical wet disc brakes; Two-post ROPS. Cab optional with air-conditioning
SpecificationB2401
Final drivesspur gear
Hydraulics
SpecificationB2350B2530
Pressure2,347 psi2,205 psi
SpecificationB2350B2401B2530
Total flow8.7 gpm7 gpm9.5 gpm
SpecificationB2401
Typeopen center
Rear valves1
Front valves1 Optional
SpecificationB2401B2530
Pump flow4.4 gpm5.4 gpm
Steering flow2.6 gpm4.1 gpm
Tractor hitch
SpecificationB2350B2401B2530KB21X
Rear TypeIII0
SpecificationB2350B2401B2530
Controlposition controlposition controlposition control
Rear lift (at ends)2,138 lb1,653 lb2,138 lb
SpecificationB2401
Rear lift (at 24"/610mm)1,290 lb
Power take-off (PTO)
SpecificationB2350B2530
Gear Rear PTOtransmissiontransmission
Hydro Rear PTOindependentindependent
Mid PTOoptionaloptional
SpecificationB2350B2401B2530KB21X
Rear PTO Type540 (1.375)540/1000 (1.375)540 (1.375)540 (1.375)
SpecificationB2350B2401B2530
Mid PTO Type2500 (Kubota 10-tooth #5)25002500 (Kubota 10-tooth #5)
SpecificationB2401
Rear PTOtransmission
Clutchoverrunning
SpecificationB2401B2530KB21X
Engine RPM540@2505540@2592530@2600
Dimensions & Tires
SpecificationB2350KB21X
ROPS Wheelbase59.1 in53.2 in
Cab Wheelbase61.4 in53.7 in
SpecificationB2350B2401B2530KB21X
Weight
Lower
1664 lb
Upper
2238 lb
1,521 lb
Lower
1598 lb
Upper
2116 lb
Lower
1554 lb
Upper
1951 lb
Front tire6-126-126.00-126.00-12
Rear tire9.5-169.5-169.5-189.5-20
SpecificationB2401B2530
Wheelbase61.4 in59.1 in
Attachments
SpecificationB2350B2401
attachments137 cm mid-mount mower deck; 152 cm mid-mount mower deck; front-end loader54" mid-mount mower deck; 60" mid-mount mower deck; front-end loader; backhoe
Electrical
SpecificationB2350B2401B2530KB21X
Groundnegativenegativenegativenegative
Battery volts12121212
SpecificationB2350B2530
Charging systemalternatoralternator
SpecificationB2401B2530
Charging amps4040
Engine Detail
SpecificationB2350B2401B2530KB21X
Displacement68.5 cu in68.5 cu in68.5 cu in68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm
Rated RPM2500260027002600
Starterelectricelectricelectricelectric
Starter volts12121212
Engine DetailKubota; diesel; 3-cylinderKubota D1105; diesel; 3-cylinderKubota D1105; diesel; 3-cylinderKubota D1105; diesel; 3-cylinder
SpecificationB2350B2530
Rated Power (net)20.4 hp21.6 hp
SpecificationB2350B2401B2530
Power (gross)22.7 hp21.9 hp24.7 hp
Air cleanerdry elementdrydry element
SpecificationB2401
Oil capacity3.3 qts
Coolant capacity4 qts
SpecificationKB21X
Power20.7 hp
Transmission options
SpecificationB2350B2530KB21X
Transmission options9-speed mechanical shuttle; hydrostatic9-speed mechanical shuttle; hydrostatic9-speed; 36-speed power shift
Transmission and speeds
SpecificationB2350B2401B2530KB21X
Typemechanical shuttlegearmechanical shuttlepower shift
Gears9 forward and reverse9 forward and 3 reverse9 forward and reverse9 forward and reverse
SpecificationB2401KB21X
Transmission9-speed gearThree gears (1-3) in three ranges with shuttle shift
Clutchdry discdry disc
SpecificationB2401
Oil capacity13.2 qts
Kubota B2350 Tires
SpecificationB2350
Standard tires (ag)Front: 6-12 Rear: 9.5-16
Lawn/turf front22x8.50-12
Lawn/turf rear31x13.5-15
Dimensions and weight
SpecificationB2350B2530KB21X
ROPS Length107.5 in107.7 in92.3 in
Cab Length113.7 in111.6 in97.6 in
Height (ROPS)91.6 in90.2 in74.8 in
Height (cab)82.2 in82.3 in77.2 in
Front tread32.8 in32.9 in33.5 in
SpecificationB2350B2401B2530
Width48.6 in44.3 in43.5 in
SpecificationB2350B2401B2530KB21X
Ground clearance10.4 in12 in10.6 in13.8 in
SpecificationB2350B2530
Rear tread38.8 in33.5 to 43.1 in / 85 to 109 cm
SpecificationB2401
Length93.9 in
Height83.9 in
SpecificationKB21X
ROPS Width44.5 in
Cab Width47.6 in
ROPS Rear tread35 in
Cab Rear tread38.2 in
Kubota B2350 Weight
SpecificationB2350
ROPS gear1,664 lb
ROPS hydro1,731 lb
Cab hydro2,238 lb
B2401 Serial Number Location
SpecificationB2401
B2401 Serial Number LocationSerial number decal on the right side of the tractor frame, above the front axle
Speeds
SpecificationB2401B2530
SpeedsWith 9.5-16 rear tiresWith 9.5-16 rear tires. Reverse speeds are 1% faster than forward
Kubota B2401 Tires
SpecificationB2401
Standard tires (ag)Front: 6-12 Rear: 9.5-16
B2401DTN Optional tires (ag)Front: 5-12 Rear: 8-16
B2530 Serial Numbers
SpecificationB2530
LocationSerial number plate on the right side of the tractor frame, above and forward of the front axle
Kubota B2530 Tires
SpecificationB2530
Standard tires (ag)Front: 6.00-12 Rear: 9.5-18
Lawn/turf front24x8.50-12
Lawn/turf rear315/75D-15
Kubota B2530 Weight
SpecificationB2530
ROPS gear1,598 lb
ROPS hydro1,653 lb
Cab gear2,061 lb
Cab hydro2,116 lb
Kubota KB21X Tires
SpecificationKB21X
Standard tires (ag)Front: 6.00-12 Rear: 9.5-20
Kubota KB21X Weight
SpecificationKB21X
ROPS gear1,554 lb
ROPS Glideshift1,609 lb
Cab gear1,896 lb
Cab Glideshift1,951 lb
Variants — Source comparison annotation
Source guideDiffering-field count reported
B2350 to KB21X96
Ratios
FigureB2350B2401B2530KB21X
Engine horsepower per 1,000 lb of weight12.314.413.513.3
FigureB2401
PTO power as a share of engine power88%
FigureB2350B2401B2530
Hitch lift as a share of machine weight128%85%134%
Pump flow per engine horsepower0.43 gpm0.20 gpm0.25 gpm
Fuel tank per engine horsepower0.35 gal0.28 gal0.34 gal
Reference directory classification
Equipment grouptractor
Owner experience with the B2350 to KB21X — Historical owner-entry sample
IndexEntry queriedReviewsForum discussionsFirst review in sampleLast review in sample
TractorByNetB2530 tractor20Jun 25, 2012Oct 9, 2019
ModelOwner ratingForum discussionsModel years reviewedPros named more than onceCons named more than once
B25304.0 of 5 from 2 owner reviews0 (3,825 views)2010named once each: good range of facilities, good power, looks nicenamed once each: flimsy body, tippy, flimsy bodywork
B2350 to KB21X: forum references — Forum-title search
Forum indexEquipment class queriedNames in the searchMatching titles
The Farming ForumtractorKubota and the B2530. That is too few titles to say what owners mostly ask about, so the most recent are listed instead1
Used market for the B2350 to KB21X — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24TractorHouseKubota tractor20
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
B2401172022 to 2026$12,900$19,900$16,68944
B253032008 to 2011$3,907$7,615$7,284None shown
B2350 to KB21X: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionKubota together with the tractor B2350, B2401, B2530, KB21XNo matching recall in this search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
  • Reference site: Kubota B2350 — TractorData. Observed 2026-09-24.
Reference site
  • Reference site: Kubota B2401 — TractorData. Observed 2026-09-24.
Reference site
  • Reference site: Kubota B2530 — TractorData. Observed 2026-09-24.
Reference site
  • Reference site: Kubota KB21X — TractorData. Observed 2026-09-24.
Owner reports
Forum threads
Used-market listings
Federal agency data
Recorded observations — Historical TractorByNet review observation
Reference scopeEquipment typeReviewed label in sourceOwner entriesAverage owner scoreScale maximumReported cons
B2350, B2401 and B2530tractorB253024.05No con named by multiple reviewers

Kubota B2350 to KB21X: Configuration records

B2350
SpecificationSource figure
Engine
Fuel tank7.1 gal
Power
Engine (gross)22.7 hp
Engine (net)20.4 hp
Gear PTO (claimed)17.4 hp
Hydro PTO (claimed)16.8 hp
Mechanical
Differential lockmechanical rear
Hydraulics
Pressure2,347 psi
Total flow8.7 gpm
Tractor hitch
Rear TypeI
Controlposition control
Rear lift (at ends)2,138 lb
Power take-off (PTO)
Gear Rear PTOtransmission
Hydro Rear PTOindependent
Rear PTO Type540 (1.375)
Mid PTOoptional
Mid PTO Type2500 (Kubota 10-tooth #5)
Dimensions & Tires
Front tire6-12
Rear tire9.5-16
Electrical
Groundnegative
Charging systemalternator
Battery volts12
Engine Detail
Displacement68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm
Rated Power (net)20.4 hp
Power (gross)22.7 hp
Air cleanerdry element
Rated RPM2500
Starterelectric
Starter volts12
Transmission and speeds
Gears9 forward and reverse
Tires
Standard tires (ag)Front: 6-12 Rear: 9.5-16
Lawn/turf front22x8.50-12
Lawn/turf rear31x13.5-15
Dimensions and weight
ROPS Length107.5 in
Cab Length113.7 in
Width48.6 in
Height (ROPS)91.6 in
Height (cab)82.2 in
Ground clearance10.4 in
Front tread32.8 in
Rear tread38.8 in
Weight
ROPS gear1,664 lb
ROPS hydro1,731 lb
Cab hydro2,238 lb
Additional specifications
EngineKubota 1.1L 3-cyl diesel
Transmissions9-speed mechanical shuttle; hydrostatic
MechanicalFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioning
ROPS Wheelbase59.1 in
Cab Wheelbase61.4 in
Weight
Lower
1664 lb
Upper
2238 lb
Attachments137 cm mid-mount mower deck; 152 cm mid-mount mower deck; front-end loader
Engine DetailKubota; diesel; 3-cylinder
Transmission options9-speed mechanical shuttle; hydrostatic
Typemechanical shuttle

Source

B2401
SpecificationSource figure
Engine
Fuel tank6.1 gal
Power
Engine (gross)21.9 hp
PTO (claimed)19.2 hp
Mechanical
Differential lockmechanical rear
Final drivesspur gear
Hydraulics
Total flow7 gpm
Rear valves1
Front valves1 Optional
Pump flow4.4 gpm
Steering flow2.6 gpm
Tractor hitch
Rear TypeI
Controlposition control
Rear lift (at ends)1,653 lb
Rear lift (at 24"/610mm)1,290 lb
Power take-off (PTO)
Rear PTO Type540/1000 (1.375)
Mid PTO Type2500
Rear PTOtransmission
Engine RPM540@2505
Dimensions & Tires
Front tire6-12
Rear tire9.5-16
Electrical
Groundnegative
Battery volts12
Charging amps40
Engine Detail
Displacement68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm
Power (gross)21.9 hp
Air cleanerdry
Rated RPM2600
Starterelectric
Starter volts12
Coolant capacity4 qts
Transmission and speeds
Gears9 forward and 3 reverse
Transmission9-speed gear
Tires
Standard tires (ag)Front: 6-12 Rear: 9.5-16
B2401DTN Optional tires (ag)Front: 5-12 Rear: 8-16
Dimensions and weight
Width44.3 in
Ground clearance12 in
Length93.9 in
Height83.9 in
Additional specifications
EngineKubota 1.1L 3-cyl diesel
MechanicalFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS
Typeopen center
Clutchoverrunning
Weight1,521 lb
Wheelbase61.4 in
Attachments54" mid-mount mower deck; 60" mid-mount mower deck; front-end loader; backhoe
Engine DetailKubota D1105; diesel; 3-cylinder
Oil capacity3.3 qts
B2401 Serial Number LocationSerial number decal on the right side of the tractor frame, above the front axle
SpeedsWith 9.5-16 rear tires

Source

B2530
SpecificationSource figure
Engine
Fuel tank7.4 gal
Power
Engine (gross)24.7 hp
Engine (net)21.6 hp
Gear PTO (claimed)19.7 hp
Hydro PTO (claimed)18.8 hp
Mechanical
Differential lockmechanical rear
Hydraulics
Pressure2,205 psi
Total flow9.5 gpm
Pump flow5.4 gpm
Steering flow4.1 gpm
Tractor hitch
Rear TypeI
Controlposition control
Rear lift (at ends)2,138 lb
Power take-off (PTO)
Gear Rear PTOtransmission
Hydro Rear PTOindependent
Rear PTO Type540 (1.375)
Mid PTOoptional
Mid PTO Type2500 (Kubota 10-tooth #5)
Engine RPM540@2592
Dimensions & Tires
Front tire6.00-12
Rear tire9.5-18
Electrical
Groundnegative
Charging systemalternator
Battery volts12
Charging amps40
Engine Detail
Displacement68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm
Rated Power (net)21.6 hp
Power (gross)24.7 hp
Air cleanerdry element
Rated RPM2700
Starterelectric
Starter volts12
Transmission and speeds
Gears9 forward and reverse
Tires
Standard tires (ag)Front: 6.00-12 Rear: 9.5-18
Lawn/turf front24x8.50-12
Lawn/turf rear315/75D-15
Dimensions and weight
ROPS Length107.7 in
Cab Length111.6 in
Width43.5 in
Height (ROPS)90.2 in
Height (cab)82.3 in
Ground clearance10.6 in
Front tread32.9 in
Rear tread33.5 to 43.1 in / 85 to 109 cm
Weight
ROPS gear1,598 lb
ROPS hydro1,653 lb
Cab gear2,061 lb
Cab hydro2,116 lb
Serial Numbers
LocationSerial number plate on the right side of the tractor frame, above and forward of the front axle
Additional specifications
EngineKubota 1.1L 3-cyl diesel
Transmissions9-speed mechanical shuttle; hydrostatic
MechanicalFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioning
Weight
Lower
1598 lb
Upper
2116 lb
Wheelbase59.1 in
Engine DetailKubota D1105; diesel; 3-cylinder
Transmission options9-speed mechanical shuttle; hydrostatic
Typemechanical shuttle
SpeedsWith 9.5-16 rear tires. Reverse speeds are 1% faster than forward

Source

KB21X
SpecificationSource figure
Engine
ROPS Fuel tank7.1 gal
Cab Fuel tank5.6 gal
Tractor hitch
Rear Type0
Power take-off (PTO)
Rear PTO Type540 (1.375)
Engine RPM530@2600
Dimensions & Tires
Front tire6.00-12
Rear tire9.5-20
Electrical
Groundnegative
Battery volts12
Engine Detail
Displacement68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm
Rated RPM2600
Starterelectric
Starter volts12
Transmission and speeds
Gears9 forward and reverse
TransmissionThree gears (1-3) in three ranges with shuttle shift
Tires
Standard tires (ag)Front: 6.00-12 Rear: 9.5-20
Dimensions and weight
ROPS Length92.3 in
Cab Length97.6 in
Height (ROPS)74.8 in
Height (cab)77.2 in
Ground clearance13.8 in
Front tread33.5 in
ROPS Width44.5 in
Cab Width47.6 in
ROPS Rear tread35 in
Cab Rear tread38.2 in
Weight
ROPS gear1,554 lb
ROPS Glideshift1,609 lb
Cab gear1,896 lb
Cab Glideshift1,951 lb
Additional specifications
EngineKubota 1.1L 3-cyl diesel
Transmissions9-speed; 36-speed power shift
MechanicalFour-wheel drive; Power steering; Mechanical wet disc brakes; Two-post ROPS. Cab optional with air-conditioning
ROPS Wheelbase53.2 in
Cab Wheelbase53.7 in
Weight
Lower
1554 lb
Upper
1951 lb
Engine DetailKubota D1105; diesel; 3-cylinder
Power20.7 hp
Transmission options9-speed; 36-speed power shift
Typepower shift
Clutchdry disc

Source

Compare Kubota B2350, B2401, B2530, KB21X
Engine
SpecificationB2350B2401B2530KB21X
EngineKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl dieselKubota 1.1L 3-cyl diesel
Mechanical
SpecificationB2350B2401B2530KB21X
MechanicalFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioningFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPSFour-wheel drive; Power steering; Wet disc brakes; Two-post folding ROPS. Cab optional with air-conditioningFour-wheel drive; Power steering; Mechanical wet disc brakes; Two-post ROPS. Cab optional with air-conditioning
Tractor hitch
SpecificationB2350B2401B2530KB21X
Rear TypeIII0
Power take-off (PTO)
SpecificationB2350B2401B2530KB21X
Rear PTO Type540 (1.375)540/1000 (1.375)540 (1.375)540 (1.375)
Dimensions & Tires
SpecificationB2350B2401B2530KB21X
Weight
Lower
1664 lb
Upper
2238 lb
1,521 lb
Lower
1598 lb
Upper
2116 lb
Lower
1554 lb
Upper
1951 lb
Front tire6-126-126.00-126.00-12
Rear tire9.5-169.5-169.5-189.5-20
Electrical
SpecificationB2350B2401B2530KB21X
Groundnegativenegativenegativenegative
Battery volts12121212
Engine Detail
SpecificationB2350B2401B2530KB21X
Displacement68.5 cu in68.5 cu in68.5 cu in68.5 cu in
Bore/Stroke3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm3.07x3.09 in / 78 x 78 mm
Rated RPM2500260027002600
Starterelectricelectricelectricelectric
Starter volts12121212
Engine DetailKubota; diesel; 3-cylinderKubota D1105; diesel; 3-cylinderKubota D1105; diesel; 3-cylinderKubota D1105; diesel; 3-cylinder
Transmission and speeds
SpecificationB2350B2401B2530KB21X
Gears9 forward and reverse9 forward and 3 reverse9 forward and reverse9 forward and reverse
Dimensions and weight
SpecificationB2350B2401B2530KB21X
Ground clearance10.4 in12 in10.6 in13.8 in

More in Kubota: KL31R–STV40, L3240–L4240, L4400/L4600/MX5800.