beanzontoast
Guru
- Location
- South of The Peaks
Recently I posted about a noise from my bb area that coincided with the rotation of the cranks - turned out to be a stray cable end that was catching one of the cranks as it rotated, easily sorted.
Thinks to self - you know, it's high time you gave that bb an overhaul. So I stripped the sealed unit bb out, cleaned and regreased the threads, refitted snugly and went for a test ride. Oh... now I hear a 'tinking' sound irregularly when pressure is put on either crank. Sometimes a double 'tink' on one side, sometimes single. Pedalling lightly gives no 'tink' at all. Pedalling with more force gives more tinks each side. Hmm... maybe I didn't tighten the bb properly and it's moving very slightly in the threads. Cue me removing, checking and refitting the bb very tightly. Another test ride. Same 'tinking' noise is present. Maybe it's the cranks shifting slightly, I ask myself. Cue me removing, regreasing and refitting the cranks very tightly. Another test ride. Aaaarrrggghhhh! Same tinking noise when the cranks are under pressure. Also, by leaning over the bike and using both hands, one on each pedal, to simulate pedalling, I can feel a slight jarring vibration in the cranks as the 'tink' sound happens each time.
Anyone have any ideas? BB had it? I'm pretty sure it's not the pedals either as I've swapped those out before - and anyway both going wrong at exactly the same time would be a bit odd, wouldn't it?
Trek 3700 btw.
Thinks to self - you know, it's high time you gave that bb an overhaul. So I stripped the sealed unit bb out, cleaned and regreased the threads, refitted snugly and went for a test ride. Oh... now I hear a 'tinking' sound irregularly when pressure is put on either crank. Sometimes a double 'tink' on one side, sometimes single. Pedalling lightly gives no 'tink' at all. Pedalling with more force gives more tinks each side. Hmm... maybe I didn't tighten the bb properly and it's moving very slightly in the threads. Cue me removing, checking and refitting the bb very tightly. Another test ride. Same 'tinking' noise is present. Maybe it's the cranks shifting slightly, I ask myself. Cue me removing, regreasing and refitting the cranks very tightly. Another test ride. Aaaarrrggghhhh! Same tinking noise when the cranks are under pressure. Also, by leaning over the bike and using both hands, one on each pedal, to simulate pedalling, I can feel a slight jarring vibration in the cranks as the 'tink' sound happens each time.
Anyone have any ideas? BB had it? I'm pretty sure it's not the pedals either as I've swapped those out before - and anyway both going wrong at exactly the same time would be a bit odd, wouldn't it?
Trek 3700 btw.