10-15-2008, 06:36 PM
Hi all,
I've been noticing on my old 10-speed that whenever I'm in the highest gear (biggest front, smallest rear) or the next one down and accelerating, there's a vibration feeling from the crank (or maybe the back wheel?). This goes away when I reach constant speed. I also don't tend to notice it when I'm in lower gears.
I don't sense any play in the BB. I've also tried disengaging the chain and just listen to the BB turning the crank. The turning felt smooth and easy. The bearing doesn't produce any grinding noise.
My chainrings aren't perfectly true. They wobble 3mm or so... Nothing that would cause accidental shifting and I'm not getting chain rub on either side of the front derailer.
Has anyone experienced this vibration before? What can be the likely cause? Should I try to get my BB serviced? Or maybe the rear hub? Thanks in advice for your reply
I've been noticing on my old 10-speed that whenever I'm in the highest gear (biggest front, smallest rear) or the next one down and accelerating, there's a vibration feeling from the crank (or maybe the back wheel?). This goes away when I reach constant speed. I also don't tend to notice it when I'm in lower gears.
I don't sense any play in the BB. I've also tried disengaging the chain and just listen to the BB turning the crank. The turning felt smooth and easy. The bearing doesn't produce any grinding noise.
My chainrings aren't perfectly true. They wobble 3mm or so... Nothing that would cause accidental shifting and I'm not getting chain rub on either side of the front derailer.
Has anyone experienced this vibration before? What can be the likely cause? Should I try to get my BB serviced? Or maybe the rear hub? Thanks in advice for your reply