In this special episode of ZippCast, we talk all about this inspiring accomplishment. Ashton and Zipp engineer Dave Morse discuss the technical aspects of the Super-9 track discs and tire pressure and the decision to ride tubular wheels. Then Ashton talks about the importance of weight training and, finally, Ashton’s partner, track racer Christina Birch, reveals the biggest worry she had when Ashton was going for the record.

Photo by Kit Karzen