The steel Fanatic BTU features the Low Differential I-Block core matched with our new low friction BTU coverstock formulation to produce “urethane” ball motion with improved consistency and enhanced hitting power on high friction lane conditions.
The Fanatic BTU can be drilled using the standard drilling techniques developed for symmetric core bowling balls.
At Brunswick, the unique core shape of each individual ball is used for weights from 14 to 16 pounds. This approach to lightweight ball engineering provides bowlers with consistent ball reaction characteristics across this weight range. At 12 and 13 pounds, Brunswick uses a generic core shape with a RG-differential that is close enough to the 14 to 16 pound shape so the same drilling instructions can be used.