dhk said:
The 10 sp I remember best from the 60's is the Schwinn Varsity, which weighed about 33 lbs if I remember correctly.
The typical mid-priced ($150) 10 sp, like my wife's Jeunet from 1974, came in at about 30 lbs. Steel rims, steel crank, Mafac Racer brakes, and the ubiquitous Simplex plastic derailleurs.
Actually, a medium size Varsity, with lights and racks, and all its equipment, a Varsity could weigh closer to 40 pounds. Reliable, and safe on paved roads, and reasonably smooth dirt and gravel roads.
A high top touring bike of the 70's, with fat tires, bigger rims, and racks, came in at around 30 pounds. These were bikes built to carry heavy loads, and travel on the worst of roads.
Today, there seems to be a contest to see who can make the lightest bike and the lightest tires. Of course, unless the team car is behind you with a spare wheel and a spare bike, these 15 pound "miracle" bikes might have trouble getting you through the day.
Last year, when Lance Armstrong crashed during a climb going about ten miles an hour, he snapped the chain stay on his OCLV frame. Luckily, it held together well enough for another fifteen minutes so that he could finish the stage. That sort of crash would barely have scratched a Schwinn Varsity.
Back when millions of folks were happy just to ride a bike, and very few people actually raced bikes, strong and heavy bikes with big, fat tires were the work horses of cycling.