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Euro nymph · Rainbow Trout

Micro-Thin Mono Rig with an .008 Butt

A micro-thin mono rig for tight-line nymphing: 312 inches of .008 Maxima Chameleon, a 20 inch RIO two-tone sighter, and 48 inches of 5X fluorocarbon tippet to a tungsten jig nymph. The thin butt sags less than heavier mono, so a light fly stays in contact farther from the rod tip. The weighted fly does the work, with no indicator and no split shot.

BBy BarblessOctober 15, 2026

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5 lb3X.008"
Maxima Chameleon
7 lb3X.008"
RIO Two Tone Indicator
~4.5 lb5X.006"
BUTT · 26 FT
SIGHTER · 20"
TIPPET · 48"
Total length31' 8"
Flies1
Knots3
WaterFreestone river, Tailwater, Small stream

Drag the drawing to pan. Tap a fly for what it does, a knot for how to tie it.

Build your leader

31' 8" of line · 3 pieces · Butt to tip

Butt 5 lbSighter5X

Tie it

0 of 3 done

These are the finished lengths. Leave extra for tying each knot.

How to tie it

  1. Build the tapered leader

    Join the 26 ft maxima Chameleon to the 20" sighter with a triple surgeon's knot. Add 48" of 5X with a triple surgeon's knot.

    Tie a triple surgeon's knot

  2. Tie on the Tungsten Jig Pheasant Tail

    Tie the Tungsten Jig Pheasant Tail to the 48" fluorocarbon Tippet with an improved clinch knot.

    Tie an improved clinch knot

The knots

  • Triple surgeon's knot · 3 turns×2
    1. Lay the new line alongside the end of the leader so they overlap about six inches, the ends pointing opposite ways.
    2. Holding the two lines as one, tie an overhand knot, passing the whole new piece through the loop.
    3. Pass the same ends through the loop twice more, three times in all.
    4. Wet it and pull all four ends evenly to seat the knot. Trim the tags.
    The triple surgeon's knot, step by step
  • Improved clinch knot · 5 turns×1
    1. Pass the tippet through the hook eye and pull about five inches through.
    2. Wrap the tag around the standing line five to seven times.
    3. Pass the tag through the small loop just above the eye, then back through the large loop you just made.
    4. Wet it and pull the standing line so the wraps snug down against the eye. Trim the tag.
    The improved clinch knot, step by step

When and how to fish it

Cast the jig upstream, lift the rod so the fly line stays in the guides and the mono hangs off the tip, then lead the fly downstream at about the speed of the current. Watch the two-tone sighter just above the water and set on any pause or twitch. Go to a heavier bead before anything else when the fly is not touching bottom. It suits riffles, pocket water and clear runs with light flies.

If the rig tangles, the cast is too fast for .008 mono. Slow down, open the loop and let the weight of the jig carry the line out.

Common questions

  • Why an .008 butt?

    Thin mono weighs almost nothing and catches little wind, so it sags less between rod tip and fly. That keeps you in contact with a light jig at longer range.

  • How long should the tippet be?

    The build has 48 inches of 5X fluorocarbon. Shorten it in shallow pockets and go longer in deep runs so the sighter stays just above the surface.

  • Do I need split shot or an indicator?

    No. The tungsten jig carries the weight and the two-tone sighter shows the take.

  • Can I cast it like a normal leader?

    Not really. It is lobbed with a slow, open stroke, and the jig pulls the line out. Fast, tight loops tangle thin mono.

Rainbow TroutBrown TroutCutthroat TroutEuroNymphFreestoneTailwaterSmall stream

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