Roto Grip’s Riot bowling ball in “Ultimate Vision Solid 
Reactive” coverstock in Dark Red and Black will be finished at 2000 Abralon. Like the Dark Star, the Riot will contain the “Photon” core. A 15# pound ball has a Radius of Gyration (RG) of 2.58 and RG Differential of .040 designed for greater mid-lane read than the Planet Series balls for more medium to heavier lane conditions. Expect the Dark Star and Riot February 24th.
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