I have posted numerous times in the past on my ball cracking experiences. However, I now believe I may hold the record...…..22 balls since 2014.
Most 900 Global, next Storm/Roto Grip, next Ebonite/Columbia 300, next Brunswick/Radical, and last Motiv.
All have been stored on ball cups, in plastic bags, and rotated every month in a climate controlled home.
Here is the latest cracking (today). I throw 15 lbs. Three months ago, a friend of mine gave me three 14 lb. balls when he dropped down in weight. I stored these for the future when I may have to drop down in weight. One was a Roto Grip Rumble which he has kept in his garage all these years in blistering heat in Florida without a problem.
Today, I went to rotate it & others and discovered it was completely cracked all the way around the ball. Moral of the story, apparently sitting for years in severe heat does not crack them, but move them to a climate controlled environment.....well you decide. From here on going forward, I only buy Motiv, because I only had one Motive ball (Chronic Paranoia) crack out of many Motiv balls I have owned to date.