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Blank Tech

Geek Speak

What goes into every one of our blanks? Plenty. Here's the tip-to-butt breakdown.

Carbon Fiber

Proprietary Prepegs


Power & Action


Carbon Fiber

Carbon fiber is an excellent material for high performance fishing rod blanks because it has a very high strength to weight ratio and it bends when a load is applied to it and it quickly straightens when the load is removed. This is referred to as recovery.

Blanks made with higher performance carbon fiber are more sensitive than those made with inferior materials because less material can be used to achieve the desired stiffness of the blank.

Less Mass = Better Sensitivity

A modern fishing rod blank is made from a carbon fiber based material that is referred to as prepreg. This material consists of carbon fibers that are impregnated with resin and backed by a woven scrim mat. This "previously impregnated" carbon fiber material – prepreg – is a flexible fabric prior to being rolled onto a steel mandrel and cured.

All RODgeeks prepregs are proprietary materials that are made in the USA

Proprietary Prepregs

RODgeeks uses proprietary prepregs that have been optimized for fishing rod blanks. Our blends have a very low Fiber Area Weight (FAW) and low resin content. Additionally, we use a special resin and cure process that eliminates carbon fiber deformation that is common in inferior rod blanks.

Our Carbon 2 and Carbon 4 prepregs are made with a very low Fiber Area Weight (FAW). This means the carbon fiber composite we use is light and flexible which allows for better compaction when we roll our blanks, and it yields more precise control over the powers and actions in our designs. It is one of the key reasons we make blanks truly fit for a RODgeek.


Resin is needed in prepreg to bind the carbon fibers together and hold them in the proper position after the blank is cured. Too much resin adds weight and reduces the sensitivity of the blank. We specify very low resin content in our prepreg to make sure that the concentration of carbon fiber in our blanks is as high as possible. This makes the material more expensive and more difficult to process, but we will never compromise the performance of a RODgeeks blank. 

Fiberglass is generally viewed as a low tech material in the blank industry because it does not have the strength-to-weight ratio or high modulus of carbon fiber. We use S-glass (structural fiberglass) in combination with our other advanced materials to create a prepreg that is loaded with technology and optimized for rod blank construction. No one else goes this far with fiberglass material, but as a fellow RODgeek, you understand why we do.

Carbon fiber is an excellent conductor of vibration. A RODgeeks low resin content blank is more sensitive than a common rod blank because more carbon fiber means more efficient transfer of line vibration to the fisherman. RODgeeks proprietary resin system and curing technology eliminate a problem called “micro-buckling” of the carbon fibers. This occurs when the resin in the prepreg expands quickly and unevenly during the cure process and deforms the carbon fibers caught in this chaotic movement. Our system cures the resin around the carbon fibers uniformly and eliminates micro-buckling, yielding very durable blanks with smooth actions.

No micro-buckling = better sensitivity. Think of unbroken carbon fibers creating straight lines of communication from the rod tip to the fisherman.

Power & Action

At RODgeeks, we separate Power and Action when describing the performance characteristics of our blanks. In Geek Speak, Power refers to the lifting ability of the blank, and Action describes the flex characteristic (or flex pattern) of the blank.

RODgeeks blanks are offered in powers ranging from Extra-Heavy (XH) to Ultra-Light (UL), and there is an incremental difference between each of our powers. Our actions range from Extra-Fast (XF), where only the top 15 – 20% of the blank flexes, to Moderate (M), where the blank flexes through its mid-section. 


RODgeeks blanks start as triangular pieces of prepreg that are cut to very tight tolerances by a computer controlled machine. There is no hand cutting of prepreg with utility knives and straight edges in our factory. While others are content to make blanks this way, we will not accept this level of imprecision.

RODgeeks blanks are made with unidirectional prepreg. This means that the fibers are running parallel to each other – there is no crossweave in the prepreg. Woven fabrics are used in airplanes and race cars as a structural element of non-moving parts. Unidirectional fabrics are used for fishing rod blanks because they are moving parts that need to bend and recover.