NITTO UI-12 Thread Stem | 31.8mm

The UI-12 is Nitto's threaded quill stem for road, commute, and vintage builds — cold-forged CrMo steel with a 31.8mm bar clamp and traditional 22.2mm quill. A stem that suits a considered build and will outlast most of the bike it's fitted to.

Available in 60mm and 70mm extensions, finished in silver. Made in Japan.

Specifications

• Material: CrMo steel (cold-forged)
• Bar clamp diameter: 31.8mm
• Quill diameter: 22.2mm
• Column length: 140mm
• Extension angle: 71°
• Extension lengths: 60mm, 70mm
• Weight: 310g (E60) / 320g (E70)
• Finish: Silver
• Use: Road / Commute / Vintage

Clamp-On vs Threaded?

The UI-12 Thread Stem uses a traditional quill (22.2mm) for threaded headsets. If your fork has a threadless steerer, see the UI-12 Clamp-On Stem instead.

Why Nitto

Nitto has been handcrafting bicycle components in Osaka, Japan since 1923. Trusted by frame builders, touring cyclists, and anyone who cares about what goes on their bike.