Champion Sports Lo Spin Competition Practice Discus Perfect your throwing form with Champion Sports’ Low Spin Competition Practice Discus. This discus has a 70 percent rim weight that creates a lower spin rate, which is perfect for beginner to intermediate level throwers. The discus features an ABS plastic shell with steel outer rim. Royal blue and silver color. Please choose weight. Item # LS10 (1 Kilo), LS16 (1.6 Kilo)