The seat upgrade for the rest of us. You're either configuring your first Vyper chair right now and wondering if your frame's going to fit comfortably on a 14-inch round seat, or you've owned the chair for a while and your hips are hanging off the edges by hour two. Either way, the answer is the same. The Big Boy attachment adds 7 inches of seat width and a thick steel base plate that turns the standard chair into the seat that actually fits. It's not just for big guys, either. Plenty of average-frame buyers add the Big Boy because the wider seat means you don't have to center yourself perfectly when you sit down, you've got more leverage to push off when standing, and the chair feels even more rock-solid underneath you. Fits: All Robust Steel Max and Elevated Steel Max models, and Robust Steel Pro Pairs Well With: Adjustable Armrest for the most comfortable Vyper build possible. Not compatible with the Sidekick This is only the attachment, not the entire chair
