Choosing the right bowling ball can make a big difference in your game, and your next bowling ball might be the perfect one for you. Understanding the specifications of each bowling ball, symmetrical vs. asymmetrical, surface finishes, RG, differential, intermediate differential, and flare potential, will help you make informed decisions and find the best match for your style and lane conditions.
Symmetrical and asymmetrical are descriptive words to describe the core shape of the bowling ball. Symmetrical core mass distribution is even and balanced around the corner. These cores deliver a smooth, predictable roll, with a consistent motion. Symmetrical are ideal for medium to dry lanes.
The asymmetrical core mass distribution is uneven with complex shapes. Produces a stronger, more angular backend reaction with increasing hook potential. Best used for heavy oil conditions, advanced bowlers, and preferred by speed-dominant bowlers.
The term factory finish is defined as the surface the bowling ball is given to the consumer by the factory, straight from the factory to the box. Sanded surfaces with a rougher feel grip the lanes with increased friction, leading to earlier and stronger hook potential. Surfaces 2000 grit and below are classified as sanded surfaces. Polished surfaces are shiny and help the ball travel further down the lane more easily and smoothly before hooking. Suited for longer oil conditions because of its stored energy later down the lane. Rule: Higher grit = shinier, longer length before hooking; Lower grit = earlier hook.
A deeper dive into understanding each bowling ball's numbers is its RG, differential, and intermediate differential. RG stands for Radius of Gyration - measures mass distribution within the ball. The lower the RG number, the quicker the ball revs up, transitions sooner, and hooks earlier. The higher RG means the ball will maintain energy longer, transition later, and hook further down the lane.
Differential is the difference between the maximum and minimum RG axes. Higher differential numbers equal greater track flare potential, stronger hook, and sharper entry angle. Lower differential numbers produce a predictable shape, smooth roll, and a more controlled reaction. Intermediate differential is only on asymmetrical bowling balls - it is the difference in RG between the ball's intermediate axis and the lowest RG axis. High intermediate differential balls change direction faster and have more dramatic hooks, while low intermediate differential balls are smoother, have a longer hook zone, and greater control.
The last spec on the bowling ball is flare potential. Flare potential refers to the ball's ability to move along different oil-free sections of its surface as it rolls down the lane. The term "flaring" is created by the track flare rings - visible stripes on the ball after each shot. The more rings, higher flaring, the more times the track of the bowling ball is touching the lanes on a fresh surface. High-flare bowling balls have more track lines and tend to hook more, while low-flare balls have fewer flare lines and result in a predictable shape.