Pin
Revision as of 07:06, 20 April 2011 by Trackbowler (talk | contribs)
Definition
A small round mark on a bowling ball that marks the top of the core.
Pin-In
Is when the distance between the pin mark and the CG (Center of Gravity) mark is less than 2".
Pin-Out
Is when the distance between the pin mark and the CG mark is equal or greater than 2".
