Storm

RG(radius of gyration)...An account of the location of the mass inside a bowling ball. Rg tells us whether the ball has the mass toward the center of the ball (low rg), toward the cover of the ball (high rg) or somewhere in between (medium rg).

1. Low rg balls rev up quickly.

2. Medium rg balls rev up slightly later.

3.High rg balls lope down the lane saving the energy until later.

usually the number is from 2.4-2.6 (as a rough gauge)


Rev rate....The number of times in which the weight block makes one full rotation around the axis line, as it rolls from the foul line to the head pin.
usually measure by use of computers

coverstock

polyester...A coverstock comprised of plastic material. Generally displays a mild ball reaction, and limited durability.

urethane...A coverstock comprised of material from the polymer family which creates a hard, durable surface on the ball.

reactive...A coverstock comprised of similar materials used in urethane formulations, however blended with different additives. This coverstock adheres to lane surface, creating the most backend reaction, the least deflection and the most hitting power of any coverstock manufactured today.

particle...Relates to coverstocks, particle technology consists of small units of various materials added to the shell. Particle coverstocks provide increased traction in the oil.

pearl...a type of coverstock which originates from the reactive polymers that is designed to mae the ball go long on the lanes

as for what sort of lanes and matching up wat sort of balls,its a combination of factors before deciding what sort of ball to use...
style of play,
speed,
lane conditions
its not just about matching up coverstock with lanes

in the past its just simply..

dry lanes...polyester/urethane/pearl

medium...reactive

heavy...particle

but with techonology so advance,its difficult to say what is for wat even though the ball manufacturer will state wat sort of condition a particular ball is made s uitable for ,but we can play with the finishing of the coverstock to get the desired reaction we get although its not recommended to do so as we will be wearing out the coverstock tru constant changing of surface

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