Rod is best with stated line weight or
can be used with one line weight heavier without feeling too
overlined.
0
Rod is best with stated line weight but
will cast one weight either up or down
without feeling too overlined or underlined.
-1
Rod is best with stated line weight or
can be used with one line weight lighter without feeling too
underlined.
Action Index
T
Primary flex is in the tip or the upper
1/2 to 1/3 of the rod.
M
Primary flex is in the mid section or
middle 1/3 of the
rod.
B
Primary flex is in the butt or lower 1/3 of the
rod.
The Stiffness Index number ( +1,
0 or -1 ) is used pretty
much as shown. The Action Index letters are sometimes
combined to describe in better detail how a rod bends during
casting and on occasion also using upper and lower case letters; a lower case letter designating less
of a particular bend characteristic than a capital letter.
A good example would be the Stiffness/Action number for my
LM Series
taper which is +1Mt and
would translate to +1 for the stiffness and a
mostly mid-flex (upper case 'M') but still exhibits
some softening of the tip (lower case 't').
Another example would be the
Clark Gierach/Best
taper which I've given an SA# of +1mT and would designate a rod with
+1 stiffness that is somewhat mid-flex (lower case 'm') and
includes a more significant bend in the tip (upper case 'T').