Axis Tilt

(Example, a spinner versus a full roller) This is a measure of the angle of the initial spin axis to a horizontal plane. A full roller or high track style would have little or no axis tilt. The initial spin axis would be parallel or close to parallel with the lane surface. One rotation of the ball would cover the major diameter of the ball. A spinner would have an initial spin axis tilted up from the lane. The ball track would be far away from the thumb and finger holes. One rotation of the ball would cover a much smaller diameter than other bowlers. The spinner style will get the ball further down the lane before it hooks.

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