This Easton EC90 stem is a high-quality threadless stem with a clamp diameter of 31.8mm and a steerer tube diameter of 1 1/8in. It is made of carbon material and has a maximum angle of 90° with a +/- 10° range. The stem is compatible with various bike types including road, single speed/fixie, track, cyclocross, gravel, and touring bikes. The black color adds a sleek touch to your bike's appearance.