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
Description
Spada Quill stem adapter. To assemble threadless 1” stem on traditional threaded fork and headset. Can also be used in conjunction with Deda Elementi Stem Sleeve Adaptor to allow you to fit modern 1 1/8th stems. Fork steerer inside diameter - 22.2mm Stem inside diameter: 25.4mm (1”) Made from Machined Aluminium Alloy