I personally would not consider it for a spare ball as I know it would hook on me.. I need a spare that goes straight no matter what it looks like (esp for the 10 pins). The Tzone works for me. True Blood looks like it would serve better as a main ball for "very dry lanes". According to the page on bowlingball.com, :
So I guess it would depend on what weight you buy..The True Blood uses the First Blood core in 14-16# weights, but has a standard pancake weight-block in 12# and 13# weights.
Bookmarks