Indoor cycling classes are great—the music, the intense instructors, the burn. Not so great? Your sore tush after class. You can blame it on the poorly padded seat all you want, but the truth is you ...

One hundred years ago, there was one basic bicycle type: frame, two wheels, narrow tyres, rim brakes, saddle, and handlebars. Nowadays, there are disc brakes, flat bars, knobby tyres, folding frames, ...