The design of spinning rods has altered considerably over the past 50 years. The original rods were heavy and long, and made for salmon spinning. They were usually of greenheart (a special type of hardwood), or built cane. The centrepin reel used with these rods required them to be slow in action to assist the revolving drum to accelerate evenly and allow line to flow off without jamming.
With the introduction of the fixedspool reel, rod action could be improved. They could be faster in action, as well as lighter. The fixedspool reel could cast lighter baits and, because the spool of the reel did not revolve, the line did not jam or overrun, making casting easier.
Spinning rods may usually be classified by the weights they can cast and the line strengths the rod can handle, their basic function being to cast a lure and to control a hooked fish.
The weight factor
As a general rule, the lighter the lure or spinner to be cast, the lighter and shorter the rod. In general, also, the lighter the lure, the finer will be the line used with it. This is because the heavier and thicker the line the more weight is required in the lure to overcome the drag of the line, which is to be avoided especially when long casts are needed because of disturbance to the water.
Most rods designed for use with the lighter spinning lure (up to |oz) are 68ft long and are teamed with fixedspool reels and relatively light lines of 48 lb b.s. Rods for the heavier lures are more often 810} ft long and may be used with fixedspool or multiplier reels loaded with lines up to 20 lb b.s. These heavier salmon spinning rods are very often used with two hands when casting and so have naturally been referred to as doublehanded.