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