The base model of the G9S offers the resistance of two 210lb weight stacks which can now be upgraded to two 260lb weight stacks utilizing Body-Solid's new optional G9S weight stack upgrade kit. This additional weight makes the G9S an even tougher value to beat.
NOTE: This upgrade is for use with the original G9S Model Gym, which came with two 210 Lb. Weight Stacks. The new model already includes two 260 lb. weight stacks.