Factors affecting lure action
1. Bib design
Similar to 'depth', the action of a Predatek lure is mainly determined by the shape, size and angle of attack of the plastic bib and the relative position of the tow-point (the eyelet or steel plate to which the fishing line is attached).
Other factors do, however, come into play.
2. Body shape and buoyancy
Lures with a bent body—such as the classic Boomerang—often deliver a wider action than straight-bodied (minnow) type lures. Floating lures usually have a more vibrant action because their buoyancy fights against the diving force generated by the the bib.
And that's a key point—the action of a lure is caused by opposing forces that struggle against one another—neither dominating. If one of the forces does dominate, action is reduced or lost. The strongest-actioned lures are those where the opposing forces are similar in strength.
Hooks, split rings and snap swivels place extra load on the lure's ability to deliver an action. Our lures are designed to work best with certain sizes of hardware. It's a matter of balance. Exceeding these sizes significantly will degrade performance or turn the lure into a stone!
A hard-bodied lure will vibrate more quickly as retrieve speed is increased. That's logical. If the speed exceeds the limits of the design, it will swim erratically or blow out (break through the water surface and barrel roll). All crankbaits have an upper speed limit. We find that lures that tow from the bib - rather than the nose - are generally more tolerant of high speeds.
Quicker is not always better. Some lures attract fish when worked slowly. We believe it's important that lures work at slow speeds so they get straight into gear once you start retrieving. When fishing heavy cover, you want the lure to start working while it's in the strike zone - not after a metre or two of retrieving.
5. Line class
Heavy line classes restrict lure action because of the resistance they have to the oscillating lateral movement generated by the bib. The effect is more pronounced on small lures which have less ability to over-power the resistance of the line.
Here's a way to understand this phenomenon.
Imagine you are holding a thin rope and shaking it to create serpentine waves running along its length. Now imagine you have hold of a ship's mooring rope, trying to make those same waves.
Now you understand how a small lure feels when it's attached to a heavy line :-)
We choose hooks that balance hook exposure without being too big or too small in relation to the lure's body.