RIO Mainstream Trout Sink Fly Line
RIO’s Mainstream series of fly lines are designed to meet the overall needs of the average and novice fly fisher. These lines feature slightly heavier and shorter head lengths to optimize rod performance and improve casting ease.
- Slightly heavier, easy casting lines for a multitude of situations
- Short, powerful front taper for good presentation and turnover
Available in:
| Option |
|---|
| Floating/Sink 3 Tip |
| Full Intermediate |
| Full Sink 3 |
| Full Sink 6 |
FAQ
What makes the Mainstream series suitable for beginners?
The slightly heavier weight and shorter head length improve rod performance and make casting easier for novice fly fishers.
Is this line suitable for trout fishing?
Yes, the sink fly line options are specifically designed for trout fishing with good presentation and turnover.
Does this line have a floating or sinking profile?
It is available in floating/sink 3 tip, full intermediate, full sink 3, and full sink 6 profiles, offering options for different water conditions.


Evan Ferguson –
Easy to cast even in windy conditions. The sink line works well for trout in deeper waters. Good balance between weight and performance for someone just starting out.
Justin Churchill –
Felt more stable than other beginner lines I’ve tried. The front taper helps with quick turnover when fishing in moving water.
Benjamin Rees –
Perfect for my first season of fly fishing. The 3-tip sink version caught several trout in a small stream. Simple to use and reliable.