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Mainstream Bass
Mainstream BassMainstream Bass

Targeted to the overall needs of the average fly fisher.

Mainstream Bass


RIO’s Mainstream bass 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 bass line is built with a warm water coating over a supple memory-free core, for the best in performance.

taper profile

Mainstream Bass - All Models

Line SizeLine ColorSink Rate
line size:WF7FLine Color:YellowSink Rate:Float
line size:WF8FLine Color:YellowSink Rate:Float
line size:WF9FLine Color:YellowSink Rate:Float
line size:WF6FLine Color:YellowSink Rate:Float
line size:WF10FLine Color:YellowSink Rate:Float