overhauling my headset I find that I busted a bearing inside the race on the stem side of the headtube. i ride a peugeot road frame that takes abuse at times (including wheelie/bunny hop landings). I know that a road frame is not meant to take the type of abuse I give it sometimes (although it is double butted steel), and the lack of give in the tires at 80-115psi will be harsh on the components, but to bust one bearing seems abnormal to me. could it be because I had the headset too tight, or that it became too loose? defective bearing? has this ever happened to anyone? busted a bearing, on any other part even?