Deda Elementi Men's Spada Quill Stem Adapter, Black, 22.2mm / 25.4mm

inside diameter diam 22,2 mm Machined aluminium alloy. This ASIN can be converted to 1 "(25.4 mm) stem compatibility, which is an older standard, more modern stems are 1 1/8 (28.6 mm) which require a washer (not included) to make them compatible close. To make this product compatible with 1 1 / 8th (28.6mm) stems, you must purchase a stem reducer