I was thinking about broken bike parts, the other day, as I was sorting stuff out for my yard sale. As I threw away a broken shifter, I started wondering if there was any part of a bike that I had never broken.
I've had pedals come apart as I rode. My crankarm snapped on the way to work, one day. I broken numerous spokes, chains and cables. Seats have come apart, as have the clamps on seatposts. I 've snapped a handlebar twice...
Freewheels have blown apart, and shifters have puked out small parts as I tried to shift. Crashes have taken brake levers out. I've had frames break (rear droputs, both times), and I luckily saw the cracked dropout on my fork before it could actually snap. But, it was broken.
I've had sealed bottom brackets come unsealed and lock up, and a half-dozen axles have become two-piece units for me, through the years.
Apparently, I am a bit hard on the equipment.
I finally figured out that there were two pieces on the bike that I had never broken: the stem and the headset.
Just give me time, though...