The developmental concept for the “Spearhead Ryuki 70S and 80S” were to capture the middle to large size main-stream rivers targeting various species of trout by casting down-cross. The semi-long lip to grip the water and flat-side body with low center of gravity fixed weight settings have equipped the lure with a high level of swimming performance in the strong flow of the main stream. Its action initiation is prompt and can handle consecutive twitching through the rod work. Some lures loose the casting comfortability through the increased body size of the lure, but by controlling the height of the body, we have managed to realize the top of the range castability. Ryuki 70S will show its true strength against the Seema in the main-stream, Red spotted masu trout and the very selective Cherry trout. It has awesome swim balance in order to tackle the intricate flow of the stream while tracing the bottom to middle range depth.