The Gravity Evolve is a great ball for heavy oil! It worked best for me as a lefty when the heads are super juicy and the backend is a little dry. I used it in my tournament the other day on a modified house shot after my Halo just faded out. My Gravity picked up sooner, and had a strong backend finish. Took game 5 winner take all with a 279! ??

This ball slides through the oil and gaining traction in the last 15ft powering through head pin. With my improvements in revs and control of my release I have increased my average by 25 pins.

If there isn't oil on the lane, the Gravity Evolve shouldn't come out your bag. Monster hook when there is heavy oil! Great first ball out the bag when there is a lot of volume of oil

League Sweeper Las Vegas - South point lane, fresh oil 9 Am start. New form the box 254 first game and 235 second game.

I'll be honest, I was not a huge fan of the Crux Prime.
I was sceptical on drilling the Evolve due to covers being the same on both balls. This ball with my drilling, 77x4x40 creates enough length through the heads and midlane with storing enough energy creating a ton of motion on the backend. This is one of the strongest rocks in my arsenal including my phaze 2 and UFO, just a little cleaner through the heads.
Hope this review helps you decide that you need one of these in your bag.

I have been seriously learning to bowl for about two years now. I have started with a Nitro 300, to a Storm High Road X, to a Storm CRUX Prime. Then the clouds broke free and light shined upon Storm Gravity Evolve and what a difference this ball. I being a lefty always seem to be fighting the oil pattern from all the right handed players. Well, not anymore! This ball hits the pocket hard each and every time. In the first game I bowled using the gravity evolve my overall average went from the 105's to now 138. I know that I've got a lot to learn and a lot more practice to get me to my goal having a an average of 175, but I'm certain with the Gravity Evolve now in my arsenal, I can see me reaching my goals faster then I thought!