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Welcome to the future of bowling.
The SPI LAB Series introduces the Concept, our next innovative release that reverses the narrative on how core/cover
combinations are developed for challenging patterns. The ARC Cover has the highest coefficient of friction (COF) values and
is right at the USBC limit on oil absorption time.
With the Concept, the coverstock acts as both the engine and the tires, while the Radius Weight Block behaves as the traction control, ensuring the ball stays on-line to find the pocket. Because the coverstock is so strong and the weight block is conservative in terms of RG/Diff, the Concept resists “locking up” or going forward down the lane. Even with a low diff, the cover technology prevents the ball from carrying oil like urethane, forcing it to continue hooking through the pins. The Concept, available in 14-16 pound weights, is a two-piece ball with a thick resin shell. The thicker shell increases the coefficient of restitution (COR), which has been shown to create more lively pin action.