The Roto Grip Hot Cell is a first in this era of bowling. This ball takes an old-school urethane coverstock and pairs it with a large, high-flaring asymmetrical core. The only previous urethane ball in recent Roto Grip history was the Grenade, which used a different urethane composition and a higher RG, lower differential symmetric weight block. The Hot Cell’s Nucleus core has been a proven winner in the various incarnations of the Cell line. The Hot Cell’s new urethane cover easily grabs the front of the lane, thanks in part to its very rough 1000 grit sanded finish. Like urethane balls do, the Hot Cell hooks early and arcs into the pocket. Unlike other urethane balls, though, the higher flare potential of the Hot Cell gives it more total hook than any current urethane-covered ball on the market.

Most urethane balls give our testers their best reactions on our dry pattern, but the extra hook from the Hot Cell made it best suited to our medium test pattern. Its dull urethane cover will grab the lane faster than any ball in the current Roto Grip lineup. It needs the traction of its 1000 grit surface to get started so as to not miss the early hook zone that urethane balls need to read in order to be effective. All three of our testers played this pattern from the outside part of the lane, getting their Hot Cells to read the front and then provide a smooth arcing motion that set-up right in front of the pocket. This was the...

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