GM21 Series Frontier Grooming Mower pulled by tractor in field
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John Deere
GM2109R
Grooming Mowers

John Deere GM2109R

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Key Features

  • 5 - 9 ft. (1.5 - 2.8 m) Cutting Widths
  • Single- or Dual-Belt Drive With Automatic Belt Idler
  • High Blade Speed for Thorough Cutting and Uniform Distribution
  • Cat. 1 iMatch Compatible With Kit
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Features
Specifications
Rugged Gearbox

The GM11 and GM21 Series Medium-Duty Grooming Mowers come with a 50-hp (37.3-kW) rugged gearbox. Cooling fins help extend the life of the gearbox.

Close-up of a green gearbox with cooling fins mounted on a grooming mower, connected to a yellow PTO driveline and secured with metal supports
Quick and easy height adjustments

The GM21 Series Medium-Duty Grooming Mowers' stamped wheel yokes with air tires have spacers for quick and easy height adjustment.

Rear view of a green grooming mower implement showing a single treaded support wheel, adjustment post, and chain curtain
Quality cut with high blade-tip speed

The high blade-tip speed and precise blade overlap work together to ensure exceptional strength, performance, and a quality cut when using the Frontier™ grooming mowers.

Underside of a green mower deck featuring three rotary blade housings, structural framing, and rear gauge wheels
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Dimensions
Overall Machine Width

112 in.

Overall Machine Width

284.5 cm

Cutting Width

110 in.

Cutting Width

279.4 cm

Weight
Operational

1490 lb.

Operational

675.9 kg

Shipping

1608 lb.

Shipping

729.4 kg

Tractor Requirements
PTO Horsepower

30-70 hp

PTO Horsepower

22.4-52.2 kW

PTO rpm

540 rpm

Hitch
Hitch Category

Category 1

Deck
Deck Thickness

0.1644 in.

Deck Thickness

4.176 mm

Deck Thickness

8 gauge

Deck Discharge

Rear

Gearbox
Mower Deck Horsepower

70 hp

Mower Deck Horsepower

52.2 kW

Ratio

1:2.1

Blade
Blade Quantity

6

Average Tip Speed

14998 fpm

Average Tip Speed

4571.4 m/min

Spindles - Quantity

3

Spindles - Composition

Cast iron

Spindles - Bearing

Shielded tapered

Overlap

1.375 in.

Overlap

3.5 cm

Dimensions

13x2.75 in.

Dimensions

33.0x7.0 cm

Composition

Heat treated alloy steel

Caster Wheels
Quantity

4

Solid Caster Wheels

Yes

Solid Caster Wheels - Size

12x4 in.

Solid Caster Wheels - Size

30.48x10.2 cm

Pneumatic Caster Wheels - Size

13x6.5 in.

Pneumatic Caster Wheels - Size

33.02x16.51 cm

Bearings

Shielded roller

Belts
Type

CX, polyester/cogged

Quantity

2

Adjustment

Slotted track

Setup Time
Labor Hours

0.5 hr

Warranty
Machine

1 year

Gearbox

1 year

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