RIO Mainstream

RIO's Mainstream series of fly lines have been developed to meet the overall needs of the average and novice fly fisher, and are designed to optimize rod performance with slightly heavier and shorter head lengths. Every Mainstream line undergoes the same rigorous production processes and quality control standards as all RIO fly lines, and is made in RIO's Idaho manufacturing facility. Each line is built with a slick coating on a supple memory-free core, for the best in performance.

  • Slightly heavier than standard lines for easy loading
  • Supple core with a slick coldwater coating


SKULine SizeColorHead WeightHead LengthSink RateTotal Length
6-20740 WF3F Lemon Green 140 36ft 10.9m Float 80ft 24.4m
6-20741 WF4F Lemon Green 165 37ft 11.2m Float 80ft 24.4m
6-20742 WF5F Lemon Green 195 38ft 11.5m Float 80ft 24.4m
6-20743 WF6 Lemon Green 230 39ft 11.8m Float 80ft 24.4m
6-20744 WF7F Lemon Green 280 40ft 12.1m Float 80ft 24.4m
6-20745 WF8F Lemon Green 310 41ft 12.5m Float 80ft 24.4m