Even More Versatility! 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. Specifications Performance Upper Mid Part Number 60-108435-93X Color Black / Royal / Grape Core MC2 Asym Coverstock Super Response Solid (HK22C) Cover Type Solid Reactive Finish 500, 2000 Siaair Micro Pad Weights 16-12 Pounds Lane Condition Medium to heavy oil Reaction Strong mid-lane and backend Warranty Two years from purchase date Release Date August 14, 2025 Core Numbers Weight RG DIFF ASY 16 lb 2.485 0.044 0.017 15 lb 2.473 0.046 0.017 14 lb 2.487 0.046 0.017 13 lb 2.597 0.041 0.014 12 lb 2.593 0.041 0.014