Nitto NJ-89 Stem

The NJ-89 is specifically engineered for track cycling and Keirin racing. While it is a high-quality component, its geometry and NJS certification are optimized for the velodrome, so it may not offer the versatility or comfort required for road or daily commuting setups.

NJS certification indicates that the component meets the strict safety and performance standards required for professional Keirin racing in Japan. It guarantees that the stem has been rigorously tested for the durability and stiffness necessary for high-wattage track efforts.

Yes, the Nitto NJ-89 is designed for a 25.4mm handlebar clamp diameter. Ensure your handlebars match this standard before purchasing, as it is not compatible with modern 31.8mm oversized bars.

While modern carbon stems often prioritize weight savings, the NJ-89 focuses on raw, uncompromising rigidity. Its aluminum construction provides a very stiff, direct feel that many track riders prefer for immediate power transfer during sprints.

This is an 'Ahead' style stem, meaning it is designed to clamp onto a threadless steerer tube. It is not a quill stem, so it will not fit older frames that require a quill-style insertion.