Discraft says this about the Challenger SS: Discraft Stability Rating: D-Line 0.7; Jawbreaker 0.7
The Challenger SS is like a seasoned Challenger out of the box! Challenger SS offers a beadless rim for a comfortable grip, with added speed and Challenger precision. Far from being flippy, players can expect a smooth, longer flight to the basket with a traditional Challenger fade.
About D-Line Plastic
Superior grip, great for beginners or pros, very economical, different amounts of wear yield desirable flight differences.