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Tractor · 1921Unverified

Best Thirty

Name: Best Thirty
Brand: Best

Best Thirty — Agricultural Crawler tractor · 33 hp. Reference specifications; pending source verification.

The Best Thirty is a tractor model rated at approximately 33 hp, positioning it at the lighter end of its class. It was produced from 1921 to 1925. The tractor is equipped with a 4-cylinder petrol liquid-cooled engine and a tracked undercarriage, paired with a 2-speed gearbox. Its operating weight is listed as 3356 kg, allowing it to support operations of up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

33 hp

Max power

18.3 kW

Weight

3356 kg

Catalogue coverage

Variants represented

Richest spec table

45 rows

Recorded power

33 hp

Recorded weight

3356 kg

Transmissions

2-speed gear

Production years

1921-1925

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerBestReference

Agricultural Crawler tractorReference

Built in San Leandro, California, USAReference

DrivecrawlerReference

Open operator station.Reference

Engine

Best 7.6L 4-cyl gasolineReference

Plows4Reference

Drawbar (tested)24.8 kWReference

Belt (tested)28.2 kWReference

BestReference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement7.6 LReference

Bore/Stroke121 x 165 mmReference

Rated RPM850Reference

Belt power (max)22.7 kWReference

Max power18.3 kWReference

Belt power (max)24.3 kWReference

Max power19.4 kWReference

Belt power (max)28.2 kWReference

Max power24.8 kWReference

Transmission

2-speed gearReference

3-speed gearReference

TypegearReference

Gears2 forward and 1 reverseReference

Gears3 forward and 1 reverseReference

Dimensions

Weight3356 kgReference

TracksReference

Width135 cmReference

Height149 cmReference

Capacities

Diameter30 cmReference

Width17 cmReference

RPM800Reference

Speed765.96 meters/minReference

Test results

NTTL 77: 2-speed crawlerReference

NTTL 99: 2-speed crawlerReference

NTTL 104: 3-speed crawlerReference

2-speed crawlerMay 9 - 20, 1921Link: Nebraska Tractor Test 77 fileReference

Drawbar performanceReference

Max pull1969 kgReference

2-speed crawlerSeptember 11 - 24, 1923Link: Nebraska Tractor Test 99 fileReference

Max pull2236 kgReference

3-speed crawlerSeptember 15 - 22, 1924Link: Nebraska Tractor Test 104 fileReference

Max pull3430 kgReference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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