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Years in Production / 1921–1925
Best
Thirty
Explore the specifications, hardware, and original references for the Best Thirty.
No photo
33hp
Engine estimate · from belt
Tracks
Drive
1921–1925
Production years
Best
Manufacturer
Thirty / 01
At a glance
Production
Agricultural Crawler tractor
Built in San Leandro, California, USA
- Manufacturer
- Best
Mechanical
Open operator station.
- Drive
- crawler
Belt Pulley
- Diameter
- 12 inches30 cm
- Width
- 7 inches17 cm
- Rpm
- 800
- Speed
- 2513 ft/min765.96 meters/min
Thirty / 02
Under the hood
Engine Detail
Best
gasoline
4-cylinder
liquid-cooled
- Displacement
- 461 ci7.6 L
- Bore Stroke
- 4.75x6.50 inches121 x 165 mm
- Rated Rpm
- 850
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled
Thirty / 03
Gears & controls
Transmission (Option 1)
- Transmission Type
- gear
- Gears
- 2 forward and 1 reverse
Transmission (Option 2)
- Transmission Type
- gear
- Gears
- 3 forward and 1 reverse
Thirty / 04
Size. Stance. Footprint.
Tires And Tracks
Tracks
- Weight
- 7400 lbs3356 kg
Thirty / 05
Tests (NTTL)
Nebraska Tractor Test 77
2-speed crawlerMay 9 - 20, 1921
Drawbar performance
- Id
- 77
- Belt Power Max
- 30.43 hp22.7 kW
- Max Power
- 24.53 hp18.3 kW
- Max Pull
- 4343 lbs1969 kg
Nebraska Tractor Test 99
2-speed crawlerSeptember 11 - 24, 1923
Drawbar performance
- Id
- 99
- Belt Power Max
- 32.55 hp24.3 kW
- Max Power
- 25.96 hp19.4 kW
- Max Pull
- 4930 lbs2236 kg
Nebraska Tractor Test 104
3-speed crawlerSeptember 15 - 22, 1924
Drawbar performance
- Id
- 104
- Belt Power Max
- 37.83 hp28.2 kW
- Max Power
- 33.21 hp24.8 kW
- Max Pull
- 7563 lbs3430 kg