This item includes a free Bowlerstore Rubber Shammy- Colors will vary for the shammy.

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.

Track s Theorem line continues to push the boundaries of performance with the launch of the new Theorem Solid. Building on the success of the Theorem Hybrid and Pearl, the Theorem Solid brings the same length and strong sweeping motion that made the original so popular only now, it s engineered to tackle medium to oily lanes with its built-in traction. This solid version fills a crucial gap in the lineup, giving you a ball that works as a reliable first ball out of the bag or a go-to option when conditions demand a bit more hook before reaching for the shiny versions. If you loved the clean, dependable reaction of the original Theorem, the Theorem Solid takes that same dynamic shape and adapts it for even more versatility when there s more oil on the lanes.

Performance: Upper Mid
Color: Black/Royal/Grape
Core: MC2 Asym
Coverstock: Super Response Solid (HK22)
Cover Type: Solid Reactive
Finish: 500, 2000 Siaair / Factory Compound
Weights: 16-12 Pounds
Lane Condition: Medium to heavy oil
Reaction: Strong mid-lane and 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)