Slam Ball: Typical type and tire type available, both in KG and LB.KG weights range:2/3/4/5/6/7/8/9/10/12/15/20~80kg, 5kg increments;2kg~10kg, Diameter: 23cm (9″);12kg~30kg, Diameter: 28cm (11″);35kg~50kg, Diameter: 33cm (13″);55kg~70kg, Diameter: 36cm (14″);Diameter: 38cm (15″).LB weights range:4/6/8/10/12/15/20~80lb, 5lb increments, 100/120/150lb.4lb~20lb, Diameter: 23cm (9″);25lb~65lb, Diameter: 28cm (11″);70lb~100lb, Diameter: 33cm (13″);Diameter: 36cm (14″).