The Nitto MTC-022 lets you run a modern threadless stem on a threaded steerer — the cleanest solution for converting a vintage or classic bike without changing the fork. Quality matters here: this is a safety-critical component, and Nitto's forged construction means it won't let you down. Fits a 25.4mm threaded steerer (1-1/8" threaded) and accepts a standard 28.6mm threadless stem (1-1/8" threadless). Straightforward, reliable, made in Japan. Specifications Model: MTC-022 Lower (threaded steerer): 25.4mm / 1-1/8" Upper (threadless stem clamp): 28.6mm / 1-1/8" Post length: 130mm Stack height: 42mm Weight: 180g Made in Japan Is This the Right Adapter? This adapter suits bikes with a threaded headset and threaded fork steerer where you want to fit a threadless stem. If you want to go the other way (threadless fork, quill stem), this is not the right part. Check your headset and steerer type before ordering. Why Nitto Nitto has been handcrafting bicycle components in Osaka, Japan since 1923. For a safety-critical adapter, that provenance and precision matters.
