This top-tier Regina 137ZRP/00F chain is engineered for high-performance sportbikes. The patented Z‑44 Z‑ring seal delivers a 50% reduction in friction and superior wear life. Featuring high‑carbon alloy pins, shot‑peened plates, quad‑riveting, and a tensile strength of ~41 kN—ideal for superbikes up to 1,300 cc.
