Mainstream Intermediate

Targeted to the overall needs of the average fly fisher.

    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
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Fly Line Selector

SKU Line Size Color Sink Rate 30ft Head Wt Full Head Wt Head Length Total Length MSRP
6-21213 WF4I Clear 1.5-2 ips 133gr / 8.6gm 164gr / 10.6gm 37ft / 11.2m 80ft / 24.4m 39.95 Buy
6-21214 WF5I Clear 1.5-2 ips 155gr / 10gm 185gr / 12gm 38ft / 11.5m 80ft / 24.4m 39.95 Buy
6-21215 WF6I Clear 1.5-2 ips 228gr / 14.8gm 178gr / 11.5gm 39ft / 11.8m 80ft / 24.4m 39.95 Buy
6-21216 WF7I Clear 1.5-2 ips 204gr / 13.2gm 280gr / 18.1gm 40ft / 12.1m 80ft / 24.4m 39.95 Buy
6-21217 WF8I Clear 1.5-2 ips 225gr / 14.6gm 315gr / 20.4gm 41ft / 12.5m 80ft / 24.4m 39.95 Buy