Do the 12 and 13 lb Hammer Effect Tour use the same core as the 14 to 16 lb?
Hammer Effect Tour Bowling Ball
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Open Oct 08, 2026 - 05:01 PM
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Staff Answer
Oct 08, 2026 - 05:01 PM
No. Hammer lists different numbers for the lighter weights: the 15 lb Hammer Effect Tour is 2.472 RG and .036 differential, while the 13 lb is 2.597 RG and .041 differential and the 12 lb is 2.593 RG and .041 differential. Those are the numbers of a different core shape, and the lower differential means less track flare, so the 12 and 13 lb roll smoother and hook less than the 14 to 16 lb. The product gallery shows both cores, one for 16 to 14 lb and one for 13 to 12 lb. The full table is on the product page.
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Hammer Effect Tour Bowling Ball
What should I know about the Effect Tour? Lower-differential Huntsman Tour Core for moderate flare and a controllable read TourV3 Solid cover at a 1500-grit finish for a clean midlane read A controllable, tour-tuned Effect for medium to heavy oil
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