The release ratio is explained in this video starting at the 37 min. mark.

You should watch both the "Axis Tilt and Rotation" and "rpm" sections along with the release ratio, because they are connected.


Understanding Ball Motion to elevate your game
contents

• Finding your PAP
• Initial PAP, Midlane PAP, Final PAP
• Roll Tape ( Roll Tracer)
• Ball Motion and Lane Play
• Entry Angle
• Burn Up or Burn Out
• Axis Tilt and Rotation
• Release ratio
• RPM
• Hardness of lane surfaces