Achieving Balance Between Fly Lines, Tippet And Hook Sizes

How to select an appropriate weight (i.e. AFTM number) of fly line

Fly rods are designed to cast a particular weight of fly line. The weight of a fly line is described by an AFTM number. This number is printed on the rod just above the handle. The AFTM number is based on the weight of the first 30 feet of the fly line. These numbers range from #0 (the lightest line) to #13 the heaviest line

Generally:

• lighter lines (AFTM#2-5)are used to cast flies tied on small hooks (sizes 14 to 23 - a tiny hook)
• heavier lines (AFTM#6-7 or 8) are used to cast larger or heavier flies

• On Westcountry rivers we use AFTM#4 or #5 weight fly lines to cast flies tied on size 15 to 19 hooks
• On local reservoirs /still waters we use AFTM#6-7 weight lines to cast flies tied on larger hooks

Should I 'overline' my fly rod?

Overlining means using a flyline that is heavier (has a greater AFTM# rating) than that recommended by the manufacturer. Do not use a flyline greater than one size above the manufacturer's recommended line rating. It may damage the rod.

Fly rods are designed to cast a particular weight of fly line. The rod loads or bends most effectively when used with this weight of line. With experience you will 'feel' a 'sweet spot' when you are casting with an appropriate length of fly line outside the rod tip.

The weight of a fly line is described by an AFTM number. The AFTM number is based on the weight (in grains ) of the first 30 feetof the fly line.

Consequently, if you know that you will be consistently making short casts with less than 30 feetof fly line outside the rod then it can help to overline the rod. The shorter length of a heavier fly line compensates for the loss of weight in the lighter fly line.