Surface finish: Box Layout: 60 x 5″ x 75 PAP: 3 15/16″ over and 1 5/16″ up Speed: 17mph Revrate: 340 rpm RG: 2.51 Diff: 0.057 Ball review: The new 503T uses the same core as the 503c, but with a much stronger coverstock. The 503T provides a lot of hook for a mid performance ball with a heavy rolling backend. [...]
Columbia, Ebonite, Hammer & Track – Bowling Ball Reviews

Here you will find the latest bowling ball reviews from the 4 brands of Ebonite. Columbia 300, Ebonite, Hammer, and Track. Our staffers will write a review of each new ball themselves and it will be posted to this site afterwards. We will also do Digitrax graphs so you can see the differences from each ball.
Below you can find the latest reviews.