Lawn Tractors

STX122 Rear Discharge Lawn Tractor

The STX122 stands out with its heavy-duty welded CentreCut™ Plus deck and wide 122 cm cutting width. Powered by a dependable B&S V-Twin engine, it’s a strong, low-maintenance choice for homeowners who want a tougher, clean-cutting mower without collection.

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Features
  • 122 cm welded CentreCut™ Plus rear-discharge deck with 3 blades
  • Briggs & Stratton® 8240 PXi V-Twin engine (724 cc)
  • Tuff Torq® K46 hydrostatic transmission
  • Cutting heights from 35 to 90 mm with 7 positions
  • Cast-iron front axle and steel protection rails
  • Deck wheels and a washout port for easier cleaning
  • Premium adjustable 18" high-back seat
  • Cruise control, electric blade engagement, and LED headlights
  • LED dashboard display with USB-A & USB-C charging ports
Manuals

Built to keep things simple

A no-nonsense approach to lawn care

If you mow often and don’t need to collect clippings every time, the STX122 is right at home. Its rear-discharge design spreads grass naturally behind the mower, letting you keep going without stops while maintaining a tidy, well-managed lawn.

STX122 Lifestyle italia
STX122 axle

Cast-iron front axle for strength and stability

Thanks to its cast-iron front axle, the STX122 feels planted and secure as you mow. It follows the contours of your lawn smoothly, helping you maintain control and a tidy finish across the whole cut.

STX122 tufftorq

Tuff Torq® K46 hydrostatic transmission

With the Tuff Torq® K46 transmission, the STX122 responds effortlessly to your inputs. You get smooth control when turning, reversing, or working around tighter spots.

STX122 tyres

Turf-friendly Grassmaster tyres

The Grassmaster tyres provide reliable traction while staying gentle on your lawn. You get confident grip when turning or climbing slight slopes, without scuffing or tearing the grass.

The heart of a dependable mower

Briggs & Stratton® 8240 PXi V-Twin engine

The STX122 relies on the trusted 8240 PXi V-Twin engine to provide steady, dependable drive. Its balanced running supports clean cutting and confident progress, even when tackling thicker grass.

STX122 engine
STX122 height of cut

7 height-of-cut positions from 35 to 90 mm

Adjusting the cut is simple with seven height settings, letting you match the mower to seasonal growth or lawn conditions. From regular trims to tackling longer grass, the STX122 adapts easily.

STX122 deck from behind

122 cm CentreCut™ Plus rear-discharge deck

Built from heavy-duty welded steel, the 122 cm CentreCut™ Plus deck combines high-volume mowing capacity with enhanced mulching performance. Featuring a half-height mulching baffle and Eliminator® blades as standard, it disperses clippings compactly to the rear while maintaining a clean, consistent cut. Deck wheels and a washout port make upkeep simple.

STX122 protection bars

Built-in protection where you need it

The sturdy rails surrounding the seat help shield the STX122 during regular use around trees, fences, and garden borders. At the same time, they offer a practical handhold for easier manoeuvring when reversing.

Designed around the operator

Simple dashboard with cruise control and RMO

The STX122’s dashboard keeps everything straightforward, with a clear LED display and neatly laid-out controls that feel intuitive from the start. Cruise control reduces fatigue on longer runs, while the RMO (Reverse Mow Option) allows you to keep the blades engaged when reversing, useful when manoeuvring around obstacles without interrupting your cut. 

A phone pocket and USB charging ports beneath the dashboard keep essentials powered and within easy reach.

STX122 control panel2
STX122 cupholder

Built-in cup holder beside the seat

A handy cup holder is positioned right next to the seat, keeping your drink within easy reach while you mow. It’s a small comfort, but one that makes longer mowing sessions more enjoyable.

STX122 front bumper

Front bumper

Built-in front bumper protection helps shield the STX122 from accidental knocks while mowing around trees, fences, or garden borders. A simple feature that adds reassurance.

STX122 Headlights

LED headlights for better visibility

Bright LED headlights improve visibility in low-light conditions, making early starts, late finishes, or shaded areas easier to manage.

Specifications and Compare

Model
STX122 L adjusted zoom2

STX122 Rear Discharge Lawn Tractor

Selected
SPX107 L adjusted

SPX107 Side Discharge Lawn Tractor

SPX275 R

SPX275 Rear Discharge Lawn Tractor

 

Learn more

Learn more
 

Power

Power

Power

Engine brand Briggs & Stratton Briggs & Stratton Briggs & Stratton
Engine model 8240 PXi V-Twin 7160 EXi V-Twin 8240 PXi V-Twin
Displacement 724 cc 656 cc 724 cc
Fuel type Petrol Petrol Petrol
Tank capacity 12 l 8 l 15 l
Starting system Electric Electric Electric
 

Mower

Mower

Mower

Cutting width 122 cm 107 cm 122 cm
Deck construction Welded Stamped steel Fabricated steel
Cutting method Rear discharge Side discharge Rear discharge
Mower type CentreCut™ Plus Side-discharge CentreCut™
Height-of-cut range 35 - 90 mm 30 - 70 mm 38 - 89 mm
Height-of-cut positions 7 6 7
Blades 3 2 3
Blade type Eliminator® Mulch blades Standard Eliminator® Mulch blades**
Mulching Optional Optional Optional
Blade engagement Electric Electric Electric
Mower deck lift Mechanical Mechanical Mechanical
 

Drive system

Drive system

Drive system

Transmission brand Tuff Torq® K46 Tuff Torq® K46 Tuff Torq® K46
Transmission type Hydrostatic Hydrostatic Hydrostatic
Front axle Cast iron Cast iron Cast iron
Forward speed 0 - 8 km/h 0 - 8 km/h 0 - 8 km/h
Reverse speed 0 - 5 km/h 0 - 5 km/h 0 - 5,3 km/h
Front wheel size 16" x 6.5" 15" x 6" 15" x 6"
Rear wheel size 20" x 10" 18" x 8.5" 22" x 9,5"
Turning radius ---- ---- 36 cm
Drive type 2WD (Rear) 2WD (Rear)
 

Features

Features

Features

Seat High-back Mid-back Premium mid-back
Wash port Yes Yes Yes
Cup holder Yes Yes Yes
Parking brake Yes Yes Yes
Hour meter Yes No Yes
Productivity (up to) 9.800 m²/h 8.500 m²/h 9.800 m²/h
Cruise control Yes No Yes
USB socket 1xUSB-A & 1xUSB-C
 

Dimensions

Dimensions

Dimensions

Length 189 cm 187 cm 185 cm
Width RD deck 127 cm N.A. cm 125 cm
Width SD deck (chute up/down) N.A. 124 / 139 cm 125 / 151 cm
Height 123 cm 115 cm 117 cm
Weight 285 kg 215 kg 247 kg
 

General

General

General

SKU 2692094 2692087 2691929
EAN 0047282824610 0047282823811 0047282820186
Product Warranty* 2-year limited 2-year limited 3-year limited

* See operator's manual or dealer for complete warranty details. Length of engine warranty coverage varies by manufacturer.
 

Good alternatives

SPX107 L adjusted
SPX107 FL adjusted

SPX107

The perfect mower for small to medium-sized lawns

Mower type
Side-discharge

Cutting width
107 cm

SPX275 R
SPX275

SPX275

Perfect for large gardens with many flowerbeds

Mower type
CentreCut™

Cutting width
122 cm