Kubota GR2120-54
Riding (Lawn Tractor) mower · Model GR2120-54 · Prosumer-duty · Diesel
Kubota Australia doesn’t publish a recommended retail price for this model online — it’s dealer quote only. The Kubota Australia product page is the place to start.
Sold in Australia — listed on kubota.com.au, checked 20 Oct 2026.
- Weighs 970 lb
- On a 6×12 trailer 1,870 lb towed, single-axle 3,500 lb
- Mows an acre in 32 min (22 at top speed) How long for your yard? ›
- How these are worked out ›
The Kubota GR2120-54 is a prosumer-grade lawn tractor, built for large residential properties and acreage, with a 54-inch deck and a 778cc engine making 17 hp. It weighs 970 lb (440 kg).
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Few close matches: the list also allows a wider deck range, other duty classes and discontinued models, each labelled.
Chosen by stated rules, not opinion: same class, a deck within 6 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.
Engine
| Power Source | diesel |
|---|---|
| Displacement | 47.5 ci (778 cc) |
| Engine Power | 17 hp |
| Engine Make | Kubota D782 |
| Cylinders | 3 |
| Fuel Type | Diesel |
Deck
| Cutting Width | 54 in (1372 mm) |
|---|---|
| Blades | 3 |
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 4 in (102 mm) |
| Discharge | Right side |
Drive
| Transmission | HST, Shaft Drive |
|---|---|
| Ground Speed | 6.2 mph |
| Drive Tire Size | 23 × 10.50 – 12 |
| Drive System | 4 w/Cruise control |
| Reverse Speed | 3.1 mph |
Dimensions
| Weight | 970 lbs (440 kg) |
|---|---|
| Fuel Capacity | 4.8 gal (18 L) |
| Length | 77.2 in (1960 mm) |
| Width | 66.9 in (1700 mm) |
| Height | 50.8 in (1290 mm) |
General
| Bagger Capacity | 7 bu (247 L) |
|---|
Similar models
Other riding (lawn tractor) mowers with comparable specs — including other brands — that buyers cross-shop with the GR2120-54.
See all Kubota mowers and specs ›
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Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
What the specs work out to
Figures MowerFacts computes from Kubota’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre8 min 6 min
- ½ acre16 min 11 min
- 1 acre32 min 22 min
- 2 acres1 h 3 min 44 min
- 5 acres2 h 38 min 1 h 51 min
About 32 min per acre at 1.9 acres/hour, mowing at 4.3 mph. The second figure is at the published 6.2 mph top speed (2.71 acres/hour) — faster than anyone really mows. About 9.1 acres per tank.
Weight & hauling
- Machine weight970 lb
- + 6×12 trailer900 lb
- Towed weight1,870 lb
- single-axle 3,500 lbCarries it, 1,630 lb spare
- tandem-axle 7,000 lbCarries it, 5,130 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,870 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 67 in of clearance.
Power & run time
- Power per deck inch0.315 hp/in
- Run time per tank~4.8 h
Mowing times assume 1.9 acres/hour: deck width x 4.3 mph at 80% efficiency, which allows for overlap, turns and trimming. 4.3 mph is 70% of the 6.2 mph top speed Kubota publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 6.2 mph, shown so you can see it.
Fit uses Kubota's published overall width.
Towed weight adds a 900 lb allowance for a 6x12 open utility trailer to Kubota's published machine weight. Your trailer's own weight is on its VIN plate. Tongue weight, axle placement and your vehicle's tow rating are still yours to check — this is the load, not a loading plan.
Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.
Source: Kubota (manufacturer) · archived copy