The Chicago Tribune outlines some details of how the stunt is performed. Wallenda’s leather walk shoes are handmade by his mother, Delilah. He has a new pair for the Chicago walk. The balance pole is 24 feet of seamless, stainless steel tubing that weighs 45 pounds. The first wire is about 3/4 inch steel and can hold 70,000 lbs, about the weight of 20 midsize cars. The second wire is rated at 42,000 lbs.