2-10-4

First known tender engine version
First known tender engine version
First use	1919
Country	United States
Locomotive	No. 3829
Railway	Atchison, Topeka and Santa Fe Railway
Designer	Baldwin Locomotive Works
Builder	Baldwin Locomotive Works
Evolved from	2-10-2, 2-8-4
Benefits	Larger firebox than 2-10-2, more power than 2-8-4
Drawbacks	Less speed from small drivers

Equivalent classifications
Equivalent classifications
UIC class	1E2, 1′E2′
French class	152
Turkish class	58
Swiss class	5/8
Russian class	1-5-2

2-10-4 (Texas)
	Front of locomotive at left
	ATSF 5001 Class Texas type
UIC class
Equivalent classifications
UIC class	1E2, 1′E2′
French class	152
Turkish class	58
Swiss class	5/8
Russian class	1-5-2
First use
First known tender engine version
First use	1919
Country	United States
Locomotive	No. 3829
Railway	Atchison, Topeka and Santa Fe Railway
Designer	Baldwin Locomotive Works
Builder	Baldwin Locomotive Works
Evolved from	2-10-2, 2-8-4
Benefits	Larger firebox than 2-10-2, more power than 2-8-4
Drawbacks	Less speed from small drivers

Under the Whyte notation for the classification of steam locomotives, a 2-10-4 locomotive has two leading wheels on one axle, usually in a Bissel truck, ten coupled driving wheels on five axles, and four trailing wheels on two axles, usually in a bogie. These were referred to as the Texas type in most of the United States, the Colorado type on the Burlington Route, and the Selkirk type in Canada.