Head to head · Utility

RK Tractors RK37 vs RK Tractors RK55

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RK TractorsModel A

RK Tractors RK37

Utility

power
37.4 hp
displacement
100 ci
Cylinders
3
Forward gears
12
Full RK37 specs
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RK TractorsModel B

RK Tractors RK55

Utility

power
55 hp
displacement
128 ci
Cylinders
4
Forward gears
16
Full RK55 specs
RK TractorsRK Tractors RK37
vs
RK TractorsRK Tractors RK55

How they compare

Headline specs vs. the whole Utility

n = 1,083–5,720

Engine Power

▲ RK55 higher · +17.6 hp (+47%)
RK3737.4 hp
RK5555 hp
Median Utility Tractor55 hp

RK37 is in the 31st percentile; RK55 is in the 50th · 5,383 models

Engine Displacement

▲ RK55 higher · +28 ci (+28%)
RK37100 ci
RK55128 ci
Median Utility Tractor183 ci

RK37 is in the 22nd percentile; RK55 is in the 30th · 5,580 models

Cylinders

▲ RK55 higher · +1 (+33%)
RK373
RK554
Median Utility Tractor4

RK37 is in the 23rd percentile; RK55 is in the 50th · 5,720 models

Forward Gears

▲ RK55 higher · +4 (+33%)
RK3712
RK5516
Median Utility Tractor12

RK37 is in the 50th percentile; RK55 is in the 73rd · 4,941 models

RK37 (A)RK55 (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecRK Tractors RK37RK Tractors RK55Difference
ManufacturerRK TractorsRK TractorsSame
ModelRK37RK55—
CategoryUtilityUtilitySame

Engine

SpecRK Tractors RK37RK Tractors RK55Difference
ManufacturerYanmarYanmarSame
Model3TNV88-CR4TNV86T-CR—
Power Output37.4hp55hp▲ RK55+17.6 hp · +47%
Rated RPM3,000RPM2,800RPM▲ RK37+200 RPM · +7%
Cylinders34▲ RK55+1 · +33%
Displacement100ci128ci▲ RK55+28 ci · +28%
Bore3.5in3.4in▲ RK37+0.1 in · +3%
Stroke3.5in3.5inSame

Transmission

SpecRK Tractors RK37RK Tractors RK55Difference
TypeSyncro shuttleNot recorded—

Dimensions & Weight

SpecRK Tractors RK37RK Tractors RK55Difference
Length126in141in▲ RK55+15 in · +12%
Width53.5in63.8in▲ RK55+10.3 in · +19%
Height94.5inNot recorded—
Operating Weight3,064lbNot recorded—

Hydraulics

SpecRK Tractors RK37RK Tractors RK55Difference
Steering TypePowerPowerSame

Power Take-off (PTO)

SpecRK Tractors RK37RK Tractors RK55Difference
TypeIndependentIndependent with electro-hydraulic clutch—
Speed 1540rpm540rpmSame

Hitch & Towing

SpecRK Tractors RK37RK Tractors RK55Difference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIISame
Hitch PositionRearNot recorded—
Hitch Capacity2,645lb3,310lb▲ RK55+665 lb · +25%

Chassis & Drive

SpecRK Tractors RK37RK Tractors RK55Difference
Chassis Type4x4 MFWD 4WD4x4 MFWD 4WDSame
Drive Type4WD4WDSame
Steering TypePowerPowerSame
Brake TypeWet discWet discSame

Electrical

SpecRK Tractors RK37RK Tractors RK55Difference
Starter TypeElectricElectricSame

Operator Station

SpecRK Tractors RK37RK Tractors RK55Difference
TypeTwo-post ROPSTwo-post ROPSSame

Category context

Both models against the field

Engine Power

median 55 hp
A · 31st percentile (37.4 hp)B · 50th percentile (55 hp)

Engine Displacement

median 183 ci
A · 22nd percentile (100 ci)B · 30th percentile (128 ci)

Cylinders

median 4
A · 23rd percentile (3)B · 50th percentile (4)

Forward Gears

median 12
A · 50th percentile (12)B · 73rd percentile (16)

Length

median 137 in
A · 36th percentile (126 in)B · 56th percentile (141 in)
A · RK37B · RK55Median Utility Tractor
Full spec pageRK Tractors RK37Full spec pageRK Tractors RK55