Fork diameter: 22,2 / 25,4 mm.

Stem diameter: 25,4 / 28,6 mm.

Semi ahead adapter made in aluminum.

Fits 1" and 1 1/8"

The adapter fits internal diameters of 22,2 mm and 25,4 mm in the fork and fits stems with internal diameters of 25,4 mm and 28,6 mm.

Length: 130 mm.

Weight: 180 grams.