Rio Premier Fathom Sinking Fly Line
The Rio Premier Fathom Sinking Fly Lines are a complete series of stillwater sinking lines designed for easy distance and complete fly control. Each line features a short, quick-loading head that minimizes false casts and includes a color contrast between the head and the running line to clearly show the loading point.
- Easy casting with a fast-loading head for minimum false casts and quick distance
- Hang Marker indicates when to stop stripping and when to begin fishing the hang
- Density Compensation provides complete depth control (except type 7)
- Built with Rio’s durable SlickCast coati technology
| Feature | Description |
|---|---|
| Quick-Loading Head | Reduces false casts and improves casting efficiency |
| Hang Marker | Visual indicator to show when to stop stripping and start fishing the hang |
| Density Compensation | Provides consistent depth control; not available on type 7 |
| Material | Highly durable SlickCast coati construction |
FAQ
How does the Hang Marker work?
The Hang Marker provides a visual cue to show when to stop stripping and when to begin fishing the hang, helping anglers maintain proper technique and control.
Does this line offer depth control?
Yes, the Rio Premier Fathom line features Density Compensation for complete depth control, except for type 7.
What makes the loading head different from standard sinking lines?
The short, quick-loading head reduces false casts and allows for faster, more accurate casting with clear color contrast to show the loading point.




Lily Wilson –
The line casts smoothly and the hang marker helps me know exactly when to stop stripping. I’ve noticed fewer false casts since switching to this line. Great for stillwater fishing.
Christopher Newman –
The density compensation works well in varying depths. The quick-loading head makes it easy to cast without losing control. Slight improvement in fly retention compared to older lines.
Liam Bond –
I use this line for bass and panfish in quiet lakes. The hang marker is very reliable and helps me stay consistent with my strips. The durability is solid after several seasons of use.
Christian Rees –
It’s easier to control the fly depth than previous lines I’ve used. The color contrast between head and body helps me see the loading point clearly during casting.