This bowling ball ships PRE-DRILLED. There are 5 sizes and the sizes that we drill are based on the weight of the ball.

X-Small: 6lbs- Ages 8 and under, Small: 8lbs and 9lbs- Ages 8-11 and womens ring size from 8-11, Medium: 10lbs, 11lbs, and 12lbs, Ages 11-15 and Adult Ring size 10 or lower, Large: 13lbs and 14lbs, Mens ring size 10-12 or people with larger hands, X-Large: 15lbs and 16lbs, Mens ring size over 13 or people with extremely large hands.

If you would like a different size drilled for the weight you selected, you must contact us via email as soon as your order is placed with your order number. Pre-Drilled bowling balls cannot be returned or exchanged.
The Theorem was a standout ball this year and made many Ball of the Year lists. Its big sweeping motion and strong continuation make the Theorem a ball that is easy to throw strikes with. It s also a ball that is hard to outdo and follow, but our engineers cracked the code with the new Theorem Pearl. The goal wasn t to reinvent anything here but to enhance what we already have. The best way to create a complement to the line was to start with the same core and cover base and add a pearl to the HK22-Prime Response cover. Adding a pearl to this combination pushes the Theorem Pearl s reaction further down the lane, creating a sharper and more defined breakpoint than the original.

Performance: Upper Mid
Color: Purple / Blue / Sky Blue
Core: MC2 Asym
Coverstock: Prime Response Pearl (HK22)
Cover Type: Pearl Reactive
Finish: 500, 1000, 1500 Siaair / Factory Compound
Weights: 16-12 Pounds
Lane Condition: Medium oil
Reaction: Length with angular backend
Warranty: Two years from purchase date

16 lbs – RG (2.485) DIFF (0.044) ASY (0.017)
15 lbs – RG (2.473) DIFF (0.046) ASY (0.017)
14 lbs – RG (2.487) DIFF (0.046) ASY (0.017)
13 lbs – RG (2.597) DIFF (0.041) ASY (0.014)
12 lbs – RG (2.593) DIFF (0.041) ASY (0.014)