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John Deere SST18 vs John Deere X166R

Verdict: John Deere SST18 vs John Deere X166R

The John Deere SST18 and the John Deere X166R are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 18 hp. John Deere X166R is the lighter machine (229 kg vs 298 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere SST18 holds more fuel (9.5 L vs 7.6 L) for longer stints between fills. John Deere X166R is the newer design (2018 vs 2000). 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
John Deere SST18 Lawn Tractor
John Deere
71
Fit score
Best match
Clear
John Deere X166R Lawn Tractor
John Deere
71
Fit score
Best match
Clear
Rated power
18 hp
18 hp
Confidence
98%
98%
Guide price
Overview
Manufacturer
Tuff TorqReference
John DeereReference
air-cooled vertical-shaft V-TwinReference
air-cooled vertical-shaft V-TwinReference
Steering
hydraulic powerReference
Engine
Fuel tank
9.5 LReference
7.6 LReference
Displacement
34.8 ciReference
40 ciReference
Bore/Stroke
72 x 70 mmReference
75 x 73 mmReference
Power (gross)
13.4 kWReference
Starter volts
12Reference
12Reference
Oil capacity
6.4 LReference
1.9 LReference
Sparkplug gap
0.762 mmReference
Power
13.4 kWReference
Starter
electricReference
Transmission
1
ThrottleReference
2
BrakeReference
3
ForwardReference
4
ReverseReference
5
Parking brakeReference
Gears
infinite forward and reverseReference
infinite forward and reverseReference
Transmission
Tuff Torq K46Reference
PTO & Hydraulics
Front PTO
independentReference
Clutch
electricReference
electricReference
Mid PTO
independentReference
Dimensions
Wheelbase
125 cmReference
122 cmReference
Weight
298 kgReference
229 kgReference
Front tire
13x5.0-16Reference
15x6.00-6Reference
Rear tire
20x10-8Reference
18x8.5-8Reference
Lawn/turf front
13x5.0-16Reference
15x6.00-6Reference
Lawn/turf rear
20x10-8Reference
18x8.5-8Reference
Length
190 cmReference
252 cmReference
Width
155 cmReference
Height
104 cmReference
114 cmReference
John Deere SST18 attachments
SST18 Serial Numbers
2001
010001Reference
2002
040001Reference
2003
050001Reference
Electrical
Ground
negativeReference
negativeReference
Battery CCA
160Reference
Battery volts
12Reference
12Reference
Charging amps
9Reference
Battery Group
U1Reference
48" Mower deck
Type
belt-driven hydrostaticReference
belt-driven hydrostaticReference
Cutting width
121 cmReference
106 cmReference
Cut height
2 to 10 cmReference
2 to 10 cmReference
Cut positions
13Reference
Variants
X166
side dischargeReference
X166R
integral rear collectorReference
John Deere X166R attachments
42" Mower deck
Overall width
110 cmReference

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.

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