ah, test for BB. bike stopped next to sturdy stationary object like sign pole or something that you can hold onto. sit on stopped bike. with pedals at 3 and 6 o'clock, stand on pedals and bounce your weight a bit. spin pedals backwards 18 degrees so the OTHER pedal is forward, and bounce your weight. hear any klink or kreak sound? its a BB related issue. you might 'feel' this creak/crink in your feet too, it will usually only happen once for each time you put one pedal forward and put your weight on it.