An adapter for attaching a 1-1 / 8 inch (28.6 mm column diameter) ahead type stem to a 1 inch (22.2 mm diameter) thread fork column.
Old-school 1-inch thread column bikes can also be fitted with a stem with a recent standard size of 31.8mm clamp diameter, giving you a wider range of customs.
Color: black, silver
Clamp diameter: 28.6mm
Column diameter: 22.2mm