Track Theorem Delta Basic Drill Designed for bowlers who demand

Designed for bowlers who demand quick adjustability and lasting support

this cover is made for those who crave aggressive backend finishes without losing control up front

Be prepared to dominate the lanes with this force of nature

This is a premium ride

Track Theorem Delta Basic Drill Designed for bowlers who demandThe Track Theorem Delta attacks medium to heavy oil with an aggressive skid flip motion. At its heart is the asymmetric MC core, wrapped in the all new Super Response Hybrid (HK22) coverstock a hybrid that gets cleanly through the fronts, then flips hard off the friction for a sharp, angular breakpoint. Tuned to a 500, 1000, 1500 Siaair Factory Compound finish, the Theorem Delta stores energy down the lane and releases it with a strong, defined