A few Bill Walton stories-
He fully endorsed a bicycle to supplement training, he had tender feet even while at UCLA, running was not a low injury exercise.
Had big feet, adidas made cycling shoes for him, they were huge. I want to say size 16.
Art Stump made a set of auxiliary quill plates to help support his foot width.
He somehow got a pair of Falcon bikes, road and track. As big as they could make.
The 18" seatposts were by Gil Hatton, Gibby Hatton's father who was a terrific machinist.
This was back in the days of the ABLofA, the last vestige of the corinthians, there was serious discussion if he would be allowed to race after he signed a pro contract.
Upon graduation, he had planned that the members of his National Championship winning UCLA team got matching bicycles as gifts from him.
My Mom worked at a bank near UCLA where he was a customer, she climbed up onto a bench in the lobby when he came in once, and got his attention by her behavior, he laughed when she told him, "I wanted to see what it's like up here".