Weight Stack: 220 lb x 2 Standard *Weight Stack Increments: (20) 11 lb plates per side (Feel like 5.5 lbs per side due to 2:1 ratio) Optional Weight Stack 286 lb (130 kg) x 2 Available *Weight Stack Increments: (26) 5 kg (11 lb) plates per side (Feel like 5.5 lbs per side due to 2:1 ratio) Optional Weight Stack 320 lb (145 kg) x 2 (640 lbs, 290 kg, combined) *Weight Stack Increments: (29) 5 kg (11 lb) plates total (Feel like 5.5 lbs per side due to 2:1 ratio) PLEASE NOTE: The weight stack cannot be upgraded at a later time as the weight stack holder and other components are build differently for the 286 lb and 320 lb stacks