Word has just reached us that Frank Berto passed away last Sunday, aged 90. Berto was one of the most inquisitive technical minds in the cycling world and a long-time contributor first to Bicycling magazine and then to Bicycle Quarterly.
An avid cyclist since his childhood in the 1940s, Frank obtained a Master’s degree in mechanical engineering from the California Institute of Technology in 1958. He worked in the oil industry as an instrumentation and oil measurement consultant. On the side, he authored more than 100 technical articles. His book The Dancing Chain traces the history of derailleurs in all its twists and turns.
Frank was one of the first to (re)discover that derailleurs shifted well if the chain gap (distance between cassette cog and upper derailleur pulley) was constant in all gears. He also measured the tire drop of dozens of tires and summarized the results in his famous tire pressure chart that remains the best guidance for inflating your tires to this day. Frank had little time for hero worship, but he appreciated companies like SunTour and the mid-century French derailleur makers who made innovative derailleurs that shifted well.
When I started Bicycle Quarterly 17 years ago, Frank sent his check for a subscription with a note. With typical frankness, he wrote: “I give you two years max. I’ve seen them all come and go, On the Wheel, the Bicycle Trader… In the mean time, I’ll help you as much as I can.” That help included xeroxing articles from his extensive library and reviewing the technical articles we wrote. He was excited when we built on his research and took it to the next step. When BQ published Aldo Ross’ article on the fiendishly complicated Campagnolo Paris-Roubaix derailleur, Frank, the expert on derailleurs, called me and exclaimed: “Finally, I understand how that thing works!”
During our frequent phone conversations, Frank was gruff, yet warm and charming. He was not just a fount of knowledge, but also fun. We owe him a lot! Our condolences go out to Frank’s wife Connie and his family.