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Kubota FT21 vs Kubota KB21X
Verdict: Kubota FT21 vs Kubota KB21X
The Kubota FT21 and the Kubota KB21X are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 21 hp. Kubota KB21X is the lighter machine (1,554 kg vs 1,995 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Kubota FT21 holds more fuel (29.9 L vs 26.9 L) for longer stints between fills. Kubota FT21 is the newer design (2012 vs 2009). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
Kubota
71
Fit score
Best match
Clear
Kubota
71
Fit score
Best match
Clear
Rated power
21 hp
21 hp
Confidence
98%
98%
Guide price
—
—
Overview
Manufacturer
KubotaReference
KubotaReference
Sixteen gears (10 in reverse) with three ranges. Gears may be shifted sequentially while moving, without using the clutch. Tractor must be stopped, and clutch used, to shift ranges.Reference
Sequential hydraulically-shifted transmission. Twelve forward gears with three ranges. Tractor must be stopped, and clutch used, to shift ranges.Reference
Variants
FT21
wheeledReference
—
FT21-PC
half-trackReference
—
KB21X
—
wheeledReference
KB21X-PC
—
half-trackReference
Engine
Fuel tank
29.9 LReference
26.9 LReference
Engine
15.4 kWReference
15.4 kWReference
Displacement
1.5 LReference
1.1 LReference
Bore/Stroke
83 x 92 mmReference
78 x 78 mmReference
Power
15.4 kWReference
15.4 kWReference
Rated RPM
2500Reference
2600Reference
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Fuel Type
dieselReference
dieselReference
No of Cylinders
3 CylinderReference
3 cylinderReference
Rated engine speed
2,500 RPMReference
2,600 RPMReference
Bore and stroke
3.27x3.64 inchesReference
3.07x3.09 inchesReference
Cooling system
liquid-cooledReference
liquid-cooledReference
ROPS Fuel tank
—
26.9 LReference
Cab Fuel tank
—
21.2 LReference
Transmission
ROPS gear
904 kgReference
704 kgReference
Cab gear
1025 kgReference
860 kgReference
Gears
48 forward and 30 reverseReference
36 forward and 24 reverseReference
Clutch
dry discReference
dry discReference
Transmission
GlideshiftReference
GlideshiftReference
Type
power shiftReference
power shiftReference
Transmission Type
PowershiftReference
PowershiftReference
forward and reverse options
12F and 12R |Glideshift : Powershift- 48F and 30RReference
9 F and 9 R | Power Shift : 36 F and 24 RReference
Wheel Drive
4WDReference
4WDReference
PTO & Hydraulics
Rear Type
IReference
0Reference
Rear PTO Type
540 (1.375)Reference
540 (1.375)Reference
Engine RPM
-649@2500Reference
-662@2600Reference
Dimensions
Wheelbase
150 cmReference
136.4 cmReference
Weight
1995 to 2304 poundsReference
1554 to 1951 poundsReference
Front tire
6-14Reference
6.00-12Reference
Rear tire
8.3-24Reference
9.5-20Reference
Standard tires (ag)
Front: 6-14. Rear: 8.3-24Reference
Front: 6.00-12. Rear: 9.5-20Reference
Optional tires (ag)
Front: 6-14. Rear: 9.5-22Reference
—
Length
290 cmReference
—
ROPS Width
117 cmReference
113 cmReference
Cab Width
131 cmReference
120 cmReference
Height (ROPS)
190 cmReference
189 cmReference
Height (cab)
193 cmReference
196 cmReference
Ground clearance
32 cmReference
35 cmReference
Front tread
97 cmReference
85 cmReference
Rear tread
94/106 cmReference
—
ROPS Glideshift
924 kgReference
729 kgReference
Cab Glideshift
1045 kgReference
884 kgReference
ROPS Wheelbase
—
135 cmReference
Cab Wheelbase
—
136 cmReference
ROPS Length
—
234 cmReference
Cab Length
—
247 cmReference
ROPS Rear tread
—
88 cmReference
Cab Rear tread
—
97 cmReference
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
General
Make & Model
KubotaReference
KubotaReference
Rollover protective structure
Two-post folding ROPSReference
Two-post ROPS.Reference
Capacities
Capacity
91.5 ciReference
68.5 ciReference
Power
Max Power
20.7 hpReference
20.7 hpReference
PTO
Rear PTO Power
AvailableReference
—
Rear PTO RPM
540 RPMReference
540 RPMReference
Engine Speed on Rear PTO speed
553@2,500 |Reference
1,182@2,600 RPMReference
Steering & brakes
Brakes
wet discReference
mechanical wet discReference
Steering type
powerReference
powerReference
Hydraulics
Rear Hitch category (SAE designation)
Category IReference
Category 0Reference
Dimensions & weight
Height Over Cab
193 cmReference
196.1 cmReference
Height Over ROPS
190.5 cmReference
190 cmReference
Overall Length
290.1 cmReference
247.9 cmReference
Overall Width
131.1 cmReference
120.9 cmReference
Overall weight
924.9 kgReference
704.9 kgReference
Wheels & tyres
Rear Wheel Type
8.3-24 agReference
Ag: 9.5-20Reference
Rear wheel tread range
37.4/42.1 inchesReference
97 cmReference
Front Wheel Type
6-14. agReference
Ag: 6.00-12Reference
Front Wheel tread range
97 cmReference
85.1 cmReference
Operator station
Cab Availability
AvailableReference
AvailableReference
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.