Theres a few threads knocking about in 98+ with some folks calling some of the new stuff coming out a 'fad' , 29ers, fat bikes, 650b. It got me thinking, what fads have there been in the past that have truly went the way of the dodo? I'd venture 24" wheels but I'm not even sure that was too widespread. Anything else that was the emperors new clothes but has now vanished?