Wheels

Wheel Dimensions

LEGO® Train Wheel Assembly (2878) Dimensions

LEGO® Technic Train Wheel (55423) Dimensions

LEGO® Flanged and Blind Driver Wheels (85489a/b) Dimensions

Wheel Elements

LEGO® Brand Wheels

Part ID	Image	Description	Geometry	Production	Bricklink / Colours
2878c01		Train wheel assembly, axle through-hole	23 mm flange diameter 2.5 mm tread 16.5 mm wheel diameter 4.0 mm depth	1991 - 2005	Catalog
						Price Guide: Black
						Price Guide: Light Bluish Gray
						Price Guide: Light Gray
2878c02		Train wheel assembly, no axle through-hole	23 mm flange diameter 2.5 mm tread 16.5 mm wheel diameter 4.0 mm depth	2006 - present	Catalog
						Price Guide: Black
						Price Guide: Light Bluish Gray
55423c01		Spoked train wheel with technic cross-axle hole and rubber friction band	24.0 mm flange diameter 2.5 mm tread 17.0 mm wheel diameter 5.0 mm depth	2006 - present	Catalog
						Price Guide: Black
						Price Guide: Red
85489a		Blind Driver spoked train wheel with technic cross-axle hole and counterweight	30.0 mm wheel diameter 5.0 mm tread 8.0 mm depth	2009 - present	Catalog
						Price Guide: Black
						Price Guide: Red
85489b		Flanged Driver spoked train wheel with technic cross-axle hole and counterweight	37.0 mm flange diameter 5.0 mm tread 30.0 mm wheel diameter 8.0 mm depth	2009 - present	Catalog
						Price Guide: Black
						Price Guide: Red
50254		Small train wheel		2009 - present	Catalog
						Price Guide: Black
						Price Guide: White

Big Ben Bricks Brand Wheels

Part ID	Image	Description	Geometry	Production	Colours
fw17.6		Flanged train wheel	24 mm flange diameter 2.5 mm tread 17.6 mm wheel diameter 8.0 mm depth	present		Black
						White
						Dark Bluish Gray
						Light Bluish Gray
						Red
						Blue
						Yellow
						Green