The Roto Grip Rubicon is the brand new asymmetrical pearl from Roto Grip. this ball features the Rondure Core wrapped in eTrax Pearl. If you liked the first Rubicon, you will like the UC2. It fits right in between the Nuclear Cell and Idol Pearl. It will come into play in league most of the time and for tournament bowlers, it will come into play around game 3-4 of a block. This ball does not stop at all. For me, it has always gone through the pins very well and never deflects, which is a great thing to see out of an asymmetric pearl.