Ebonite Tombstone Specifications

The Ebonite Tombstone bowling ball features a "Bombs Away" core that's designed to a powerful heavy oil ball. This core is located above the finger holes for maximum backend hooking potential. Knowing the other specs for this bowling ball will help you decide the best ball for your particular style of game.

  1. Factory Finish, Color and Radius of Gyration Rating

    • This ball features a factory polished Pro Reactive Resin with a sanded finish. It comes in a gray or granite color. The Radius of Gyration rating range from one to 10, with lower numbers indicating that the ball's mass is centrally distributed and higher numbers indicating that the ball's mass is distributed towards the ball cover. Most bowling balls fall between 2.46 to 2.8, and this ball has a 2.510 rating.

    Ideal Lane Conditions, Mass Bias, Flare Potential and Differential

    • The optimum lane condition for this ball is heavily oiled, although lane preference can vary from bowler to bowler. Mass Bias (or BOMB) refers to the direction that the mass of the ball is biased towards, and the BOMB rating for this ball is 0.013. This ball also has a high flare potential and a differential rating (on a scale of one to 10) of 6.7.

    Coverstock, Length and Backend

    • The ball comes with a particle coverstock. The length for this bowling ball, which refers to how far the ball will travel before it begins to hook, is 2.1 (on a scale of one to 10) if the ball has a factory finish. The backend refers to the last 15 feet of the lane before the bowling pins, and the backend rating for this ball (on a scale of one to 10) is 10+.

    Bowler's Style Tips and Quality

    • This ball is designed to fit the style for players preferring faster ball speeds and low to average RPM players. The quality rating for most bowling balls produced by factories is First Quality, and this ball fits that description.