Richard R. wrote:


Or maybe i am looking at it wrong.


Richard

Actually, you are, to a certain extent. Got to consider the dynamics of
what's involved. as anything traveling on momentum will do, the lure is
slowing down almost from the instant you release your thumb. There's
little change in lure speed in the first third or half of the distance
the lure travels, but it is happening. and it happens faster farther
into the cast.

The thicker line will remove more of the diameter of the spool as line
pays out, and will need to spin the spool faster to keep up. Spinning it
faster increases the force exerted by the centrifugal brakes, which in
turn help more to accommodate for an inexpert or simply unused thumb
more than they would with a thinner line and the consequent larger
diameter/slower speed of the spool at the same point in the cast.

It should also be noted that a narrower spool also increases the
effectiveness of the centrifugal brakes for the same reason.