I do not know what the upgrade for that ball would be as I never bowled storm balls yet... I do want to get a storm virtual gravity nano to try but who knows lol ... Anyways back to the topic I have heard bowlers say upgrade your balls every year or so but I just always see a ball and if I like it I research it and see if it would be something I like. You can also talk to your proshop and tell the pro shop person you like storm and if you decide to upgrade then they can also lead you into a couple choices that you may like. Sorry if I wasnt as much help lol
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