Rod Guide Placement

Wayne Cattanach Formula

This page finds a spacing for the guides on your flyrod. It is based on Wayne Cattanach's original "Guide" program, which is a clever yet easy method to an attractive guide spacing. An alternative is the Dale Clemens formula.

The program requires four inputs, in a choice of American or metric units:

  1. The number of guides. A rule of thumb is to round the length of the rod to whole feet (rounding up for six inches), then add one. This gives the number of snake and stripper guides, not counting the tiptop.
  2. A guide to index from. For instance if you want guide number six placed just below the ferrule, you are indexing from guide six. (Guides are counted from the tip end down.)
  3. Distance of index guide from tip. In inches or centimeters.
  4. Amount to increase the spacing. Spacing between guides increases this much for each successive guide. Wayne suggests 9/16 of an inch (about 1.4cm). Intuitively, you may want a smaller increase for slower or parabolic rods or a larger increase for extra-fast rods, to put more guides where the rod is stressed.

After its done, you may want to adjust the position of the stripper guide a little to get it a comfortable distance from the grip. Its a balance between aesthetics and function, like everything else.

American
Number of guides
Guide to index from
Distance to index guide (inches) (fraction)
Increment each guide by (fraction of an inch)
Metric
Number of guides
Guide to index from
Distance to index guide (centimeters)
Increment each guide by (centimeters)