Prezados atletas,

Respondendo ao questionamento formalizado pela Federação Paulista de Boliche, venho informar que é PROIBIDA a utilização de bolas com alterações feitas após a produção (no caso específico, grafitadas), conforme Manual de especificação e certificação de equipamentos da USBC.

http://usbcongress.http.internapcdn.net/usbcongress/bowl/equipandspecs/pdfs/2012-equip-and-specs-manual.pdf

Copio abaixo o trecho que trata especificamente do assunto (grifos de minha parte).

Bowling Ball Specifications

Any bowling ball used in USBC certified competition must be approved and identifiable as a ball listed in the “approved bowling ball” list located on the Equipment Specifications page on www.BOWL.com.

Additionally, for identification purposes, each ball must have some form of serial number (this may be engraved or re-engraved by the bowler); the ball’s original brand and product name logos must be engraved on each ball.

No additional logos or designs may be added to a previously-approved ball without approval from the USBC. Since all bowling balls manufactured prior to the creation of the ball list (January 1991) have been previously approved, the acceptance of the balls is at the discretion of the tournament director and/or league official.

Atenciosamente,

Fabio Grossi
Diretor Técnico da CBBOL