Double Tapered vs Weight Forward Fly Lines – Which is really better?

by Bruce Richards

constantly amazed that this subject is still an issue with so many anglers, on so may forums and by so many ‘experts’, i thought it might be of worth to pull up this article and let Mr FlyLine explain it himself.
of further interest we’ll note that the exact same principles of mass (or of more practical use,  diameter), tapers and lengths apply equally to leaders. a leader is to be designed as the continuation of the fly line and not an entirely separate entity.  what applies to line selection applies to leader selection. the two work hand in hand, so to speak, to enable the fly angler to meet the specific casting/fishing challenge at hand.


“Few fly line subjects have been discussed more than which is the better taper, double taper (DT) or weight forward (WF). The answer is, neither is inherently better, but one may be better than the other for you.

A lot of generalizations are made about these two tapers based on outdated or incorrect information. We’ve all heard that DT lines are more delicate, give better control, roll cast better, etc. In some cases some of these things are true, but not always.

Delicacy of delivery is determined by the mass of the front part of a fly line. This is determined by line diameter (which relates directly to mass), and taper length. A line with a small diameter tip and a long taper has much less mass up front than a line with a large tip and short taper. Don’t be mislead by taper length alone, a line with a long front taper but a large tip diameter will not deliver delicately. A DT and a WF line with the same taper and tip diameter will deliver the same.

For many years most DT and WF lines were made with the same tip diameter and front taper length so there was no difference in how they delivered, although many claimed there was. Today, some of the DT lines are actually designed to be used specifically for spring creek type fishing and do have longer tapers and/or smaller tips.

Anytime a line (or any product for that matter) is designed to do one thing very well it usually has a shortcoming somewhere else. Lines that are designed to be very delicate have little mass in the front to carry larger or heavier flies, and don’t handle windy conditions well. It takes a better caster to throw the kind of loops it takes to make these lines perform their best. And no, DT lines aren’t more “accurate” at normal fishing distances, that is entirely in the realm of the skill of the caster. Good consistent loops and practice are where accuracy come from.

It is very true that DT lines are easier to control and roll cast at longer distances than WF lines. At shorter distances there is no difference. The key to line control and roll casting is that large diameter line belly must be in the rod tip. If small diameter running line is in the tip it is nearly impossible to transmit enough energy through it to the belly to make the line do what you want. What many people don’t consider is that WF lines control and roll cast as well as DT lines at the distances most people fish.

Most WF lines have heads that are 35-40 ft. long. Add a 9 ft. leader and the distance to the fly from the end of the head is 44-49 ft. To that, add the length of the rod since roll cast normally end with the rod parallel to the water and pointed at the target. That is the distance at which DT and WF lines control and roll cast the same. There aren’t many typically trout fishing situations that require roll casts longer than that, and not many casters who can roll cast that far. What this all means is that DT and WF lines work pretty much the same at the distances we fish most of the time.

Certainly if someone fishes a big river that requires a lot of long distance roll casting and mending he or she should consider a DT line or a WF with a long head. Rods longer than 9 ft. are almost a necessity also, roll cast distance and mending performance is directly dependent on rod length.

Everybody knows that WF lines are better for distance than DT lines, but is that really true? Well, yes, but the difference isn’t as big as you might think. Certainly WF lines shoot better because of their small, light running lines. But remember, this benefit starts at 44-49 ft. when the running line is in the rod. If you will be making a lot of long casts it is certainly a little easier to do with a WF line, but don’t think that DT lines won’t shoot, they will, just not as far. With the advent of new slick coatings like AST DTs shoot better than ever.

For most people it probably doesn’t make a lot of difference which taper they use. Most of us fish at distances less then 44-49 ft. which is where WF’s start to shoot better, but lose line control. Most of us don’t have the need, or the ability, to roll cast longer than 45 ft..

So, how do you decide which is right for you? If you do mostly small fly fishing at short to medium range there is no reason not to get a DT line. There is always the budget issue, DT lines are essentially 2 in 1 so are less expensive over time. If you are consistently throwing long casts you will be able to make them with fewer false casts with a WF line, but lose the ability to do long roll casts and mends, if you ever need them, and are able. For most of us it doesn’t make much difference which taper we use most of the time, make your decision based on how much short distance fishing, or long range fishing you do.”


related articles

WF vs DT debate

via  Scientific Anglers 

“It gets a bit more complicated when people claim that a DT can pick up easier, can carry more line, can mend better, and the favorite, can roll cast better than a WF line.  All of these claims assume that you are fishing distances beyond the rear taper of the WF line.  If you are fishing distances less than the length of the Front Taper+Belly of the line, you are virtually fishing the exact same line.”


hard to disagree with most everything there. there does seem to be however a WF biased opinion not only in this article but how it’s reflected by the pretty lacking selection of DT’s on their catalogue. not having a search bar the site isn’t the easiest to navigate and as far as i can tell there’s only one very generically named line in the DT format: Floating

personally, as a general line for trout-type species in rivers and streams i find the DTs hard to beat because i’m often fishing behind the head length, specially if it’s a short head and i’m adding enough line length to perform curves, mends and drag-controlling slack.
being limited in how i fish by the line’s head length is about as obnoxious as it gets.
having the majority of the line’s weight at the rod tip for all the roll and spey casts i find absolutely necessary in river fishing makes them easy, smooth and pretty and easies, smooths and pretties are there for aerial casts too.
ok, with DTs we generally don’t shoot much line if any at all and for most people that’s a very good thing as far as fly presentation goes.
shooting line and being delicate and precise while controlling the running line with WFs is of course possible but demands more casting practice work than most anglers are prepared to put some effort in…
DTs aren’t the end-all solution to everything, nothing is. they are however a very viable option a lot of anglers might be happy to re-discover.

it’s a shame that fashion over reason has made them almost obsolete but some companies like the Barrio Mallard Double Taper Floating Fly Line and Rio and the S.A. line mentioned above give us a choice.
another non-negligable aspect is the average price of a DT compared to WFs. as an example, the Barrio Mallard is £19 each including free worldwide shipping.
who can beat that ?