Discraft says this about the Sol: Discraft Stability Rating: Z-Line -.5

The popular 2018 Ace Race disc - Sol - is here! Available in our iconic Z plastic, this is a great mid range for beginner to advanced players, allowing them to shape approach shots with ease and comfort and enjoy the fun of disc golf, right from the start. Slightly understable, throw the Sol with speed and watch it float out gently to the right. The perfect disc for anhyzer approaches.

Flight Guide
Speed	4
Glide	5
High Speed Stability	-3
Low Speed Stability	0

Sol (Z-Line)