Rio Technical Trout fly line review

The Rio Technical Trout is a premium fly line designed for delicately presenting small dries to easily-spooked trout and grayling.

Rio Technical Trout fly line review
© Fly and Lure
Rio Technical Trout fly line review
Picture copyright © Fly and Lure
Rio Technical Trout fly line review
Fly lines Estimated reading time 6 - 9 minutes

What is the Rio Technical Trout fly line?

The Rio Technical Trout is a small range of premium fly lines designed for delicately presenting small flies to fish in technical situations on rivers. While it excels as a fly line for fishing small dries at medium distance, it's also a great choice for nymphs, spiders, and other patterns on rivers and stillwaters.

Picture copyright © Fly and Lure.

What taper does this line have?

There are two tapers available in the Technical Trout range - a standard weight forward or WF line and a less commonly seen double taper or DT line. The Rio Technical Trout WF has a very long 52' head so it's very delicate to cast and you need lots of line outside the tip to fully load the rod. The back taper and front taper are both very long, so you can carry large loops and they remain stable and present flies delicately.

The double taper version also has a long front taper (a foot shorter than the weight forward version) but no head as such, with the body of the line effectively forming the head itself. Again, this makes it excellent for creating stable loops and carrying larger amounts of line.

The weight-forward version is likely the most popular of the two, and the head will help to turn over longer leaders and bulkier flies. The double taper does have the added benefit that when one end wears out, you can simply flip the line over and use the other end to get an extra season or two of use out of the line for no extra outlay.

Picture copyright © Fly and Lure.

What sizes are available?

The Rio Technical Trout comes in four sizes: #3, #4, #5, and #6. The #3 line is 80' in length (since who needs to cast a #3 90'), but the #4-#6 lines are the regular 90' length. Each one of them has a different head length designed specifically to suit the line weight.

The lines have a two-tone finish with a very pale blue head and a peachy yellow running line and have a braided core with minimal stretch.

Line size 30' head weight Full head weight Head length Line length
#3 6.6g 9.7g 45' 80'
#4 7.9g 12.3g 49' 90'
#5 9.2g 14.9g 52' 90'
#6 10.5g 17.2g 54' 90'
Picture copyright © Fly and Lure.

Does it have welded loops?

Yes, there are small welded loops on each end of the fly line which makes it quick and easy to attach to your reel and speeds up the process of switching leaders when on the river. 

What does it feel like in the hand?

Rio claims that the slick coating on the Technical Trout, known as SlickCast, is the slickest and most durable on the market. They say lab tests show it has the lowest friction ever measured in a fly line. The line also uses "MaxFloat Tip Technology" that Rio says makes it float more than twice as high in the water as regular lines. 

In the hand, the lines feel very dry and don't have the shiny slickness you get on other fly lines. They're very low stretch and not as supple as on some other lines, such as the similar and much cheaper Scierra Aerial Long Belly.

For a line at this price point, the coiling when it comes off the reel is more than I would like, however, it does pull out after a gentle stretch when the line is first pulled from the reel.
Picture copyright © Fly and Lure.

What is the Rio Technical Trout like to cast?

Unsurprisingly, the Rio Technical Trout is a lovely line to cast. Since the head is very long you need more line outside the tip to feel your rod loading as it would with a regular 35-40' headed fly line, so it has a soft, delicate feel. The long tip section means that flies present very delicately, but it's only really suitable for smaller, less bulky fly patterns.

The very long head lets you form large stable, tight loops and carry lots of line so it's a great line for fishing small flies, such as dries, at medium to long distances.

However, it's also great for close range and medium distance, providing you use appropriately sized fly patterns. Presentation is superb, thanks to that extra-long tip.

I've got the #5 weight forward line and have used it on very slow glass rods, such as the Redington Butter Stick, and faster rods such as the Loop Evotec. It casts really well on both but feels most at home on slightly slower-actioned rods, where the long head means it will still load the rod OK.

Picture copyright © Fly and Lure.

How much does this fly line cost?

Rio fly lines are priced at the top of the market so don't come cheap at all. Expect to pay around £100 for one of these. This is pretty pricey but the lines are well made and work well. The Scierra Aerial Long Belly makes a good alternative if you're on a budget and it has far less memory than this line. 

About the author

matt

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