USBC indicates it will implement 73D minimum hardness with ball testing for slow oil-absorbing bowling balls for some national events

USBC on Thursday in this Facebook post released a “2026 Hardness Field Testing Research Report summarizing the first year of field data collected on slow oil-absorbing bowling balls at USBC national championship events.” The report is here and attached to this story as a PDF. The most notable part of the report is that “USBC plans to implement 73D as a low-end field hardness limit for slow oil-absorbing equipment at specified USBC national events. More information on that, incl...