Fly Fishing Lines: Understanding Tapers, Line Weights and Sink Rates

The fly line is central to how a fly rod loads and delivers a cast. Selecting a fly fishing line therefore involves more than matching the number printed on the rod. Its taper, head design and floating or sinking properties all affect the way it can be used.

The selection includes Weight Forward and Double Taper lines, floating trout lines, intermediate and sinking stillwater lines, Euro nymphing lines and profiles for streamer and predator fishing.

WF and DT Fly Line Tapers

Weight Forward lines

WF lines concentrate much of the casting weight towards the front. Head length and taper shape vary, giving different lines distinct handling characteristics.

A line designed for delicate trout fishing is not necessarily intended to deliver the same flies as a profile built for substantial streamers.

Double Taper lines

DT lines use a double-taper construction, providing another way of distributing casting weight. They are useful for particular controlled casting and presentation preferences.

Choose according to your rod and casting requirements rather than assuming either taper is universally superior.

Floating Fly Lines for Dry Fly Fishing

A floating fly line is a common choice for dry flies and many river techniques. It allows the main line to remain at the surface while the leader is selected for the intended presentation.

Compare front taper and head design, particularly when fishing small flies and longer leaders.

Intermediate and Sinking Lines

Stillwater and streamer fishing often call for presentations beneath the surface. Intermediate lines provide one level of sinking behaviour, while fully sinking versions are available in different densities.

The range includes choices such as Sink 3, Sink 5 and Sink 7 in specific series. Match the sink rate to the depth and retrieve required, and consult the actual product specifications.

Specialist Euro Nymphing Lines

Euro nymphing lines use a different approach to conventional WF casting lines. Their slimmer or specialist profiles are intended for particular ways of maintaining control of the leader and nymphs.

Compare diameter, design and compatibility with your nymphing rod, especially when preparing an outfit for competition-style techniques.

Lines for Streamers and Predator Flies

Large streamers need a casting setup suited to the size and mass of the fly. A specialist line may use a different head profile from a line intended for subtle dry fly presentations.

For pike, lake and coastal fishing, also consider whether a floating, intermediate or sinking arrangement matches the technique.

Matching Fly Line, Reel and Leader

Begin with the rod's line rating, then examine taper and density. Check that the reel has enough capacity for the line and any backing.

Complete your outfit with an appropriate tapered leader, and explore backing and running lines for further setup options.