Bicycle Stem Adaptor 22.2mm to 28.6mm for 1-1/8" Threadless Stem New Stem Adaptor allows the use of an 1-1/8" threadless stem on a bike with a 1" threaded fork Bike Types:mountain, BMX, Road Bike, City bike Size:22.2mm to 28.6mm Length:150mm Material: Weight:164g-176g