The early 1970s experienced a boom in bike use by adults. Transportation journalist Carlton Reid links the first Earth Day, Watergate, and Baby Boomers in Bicycling Booms During Lockdown—But There’s A Warning From History
Some more context on biking in the 1970s
I rode my bicycle throughout the 70s but never thought to sport one of those fancy scarves.
Scarves and spinning wheels are a potentially dangerous combination.