Bowling Technology Study Effective Dates
EFFECTIVE AUGUST 1, 2018
The new rule will allow for bowling balls weighing more than 10 pounds to have one of the following options:
- (1) If the ball is drilled without a balance hole, it may have up to three ounces of top or bottom weight, side weight, and finger or thumb weight (3-3-3).
— OR —
- (2) If the ball is drilled with a balance hole, it may have up to three ounces of top or bottom weight, and one ounce of side wait and finger or thumb weight (3-1-1).
EFFECTIVE AUGUST 1, 2018 — AUGUST 1, 2020
Bowlers will have two options that coincide with the new static weight and balance hole rules:
- (1) As of August 1, 2018, if the ball is drilled without a balance hole, it may have up to three ounces of top or bottom weight, side weight, and finger or thumb weight (3-3-3). Any bowler choosing not to have a thumb hole will be required to mark either by scribe, engraver, or tool their intended center of palm with a plus mark.
— OR —
- (2) If a bowler chooses to have up to one ounce of static side, thumb, or finger weight — with or without a balance hole — the entire gripping hole specification change would remain with the effective date of August 1, 2020 when all balance holes are eliminated.
EFFECTIVE AUGUST 1, 2019
- Only a dry towel can be used to clean bowling balls during competition.
- Liquid cleaners of any kind will only be allowed before or after competition.
EFFECTIVE AUGUST 1, 2020
- All balance holes will be eliminated and deemed illegal for use in USBC-certified competition. Work with your local pro shop to have all balance holes plugged by July 31, 2020.
- A bowler cannot change the static weight of a ball during competition by drilling gripping holes deeper.
- House balls will be the exception from the new gripping holes rule. NOTE: A ball left in a bowling center by a bowler to be used as a house ball is not considered a house ball.