Tractor · 1919Unverified
Best Sixty
Best Sixty — Agricultural Crawler tractor · 56 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
56 hp
Max power
37.3 kW
Weight
7938 kg
Hover a source tag to verify
Overview
ManufacturerBestReference
Agricultural Crawler tractorReference
Built in San Leandro, CAReference
DrivecrawlerReference
Open operator station.Reference
Engine
Best 18.5L 4-cyl gasolineReference
Plows9 (14-inch)Reference
Drawbar (tested)41.8 kWReference
Belt (tested)54.4 kWReference
BestReference
gasolineReference
4-cylinderReference
liquid-cooledReference
Displacement18.5 LReference
Bore/Stroke165 x 216 mmReference
Rated RPM650Reference
Belt power (max)41.8 kWReference
Max power37.3 kWReference
Belt power (max)49.2 kWReference
Max power41.8 kWReference
Belt power (max)54.4 kWReference
Transmission
2-speed gearReference
3-speed gearReference
TypegearReference
Gears2 forward and 1 reverseReference
Gears3 forward and 1 reverseReference
Dimensions
Weight7938 kgReference
TracksReference
Length355 cmReference
Width228 cmReference
Height194 cmReference
Capacities
Diameter40 cmReference
Width30 cmReference
RPM650Reference
Speed829.06 meters/minReference
Test results
NTTL 76: gasoline 2-speed crawlerReference
NTTL 98: gasoline 3-speed crawlerReference
NTTL 105: gasoline 3-speed crawlerReference
Gasoline 2-speed crawlerMay 6 - 24, 1921Link: Nebraska Tractor Test 76 fileReference
Drawbar performanceReference
Max pull4989 kgReference
Gasoline 3-speed crawlerSeptember 10 - 14, 1923Link: Nebraska Tractor Test 98 fileReference
Max pull5123 kgReference
Gasoline 3-speed crawlerSeptember 15 - 29, 1924Link: Nebraska Tractor Test 105 fileReference
Max pull5606 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.