This sound is heard while riding but not when at home on the bike stand and I can’t figure it out to fix it.
I have already ruled out:
* drivetrain (carbon belt on Shimano 8spd IGH): frequency of sound is linked to speed in all gears
* tire nubs rubbing fenders: I cut them down
* broken spoke: all spokes have tension
* disc brake pads: same sound is heard under braking
Ideas?
Help me identify the sound
byu/RationalDivergence inbikecommuting
by RationalDivergence
22 Comments
I’d try removing that rear fender / rack if you have one and see if that is part of it.
Either your rear fender or your brake rotor on the rear is tweaked just the slightest bit.
Rotor could be rubbing on the caliper, not the pads
Der Reflektor in den Speichen, wenn er locker ist
Maybe loose light reflector? I’ve had something like that before when I had to go through tightening all the fasteners for general maintenance.
It appears to be in time with your reflector.
Sounds like spokes, maybe its the reflector or loose spokes
It sounds like to me that your reflector is loose.
i know you say you have eliminated the tire rubbing on the fender, but it sounds like that to me, and it coincides with the small wobble i can see in your tire
Priority Current plus !
i think it’s the rear guard rubbing on the tire. the tire isn’t very true so the wobble is dragging every rotation. it should correlate with speed rather than pedal cadence.
the guard looks pretty tight, i would just slide it out a few mm on each post and it might fix it.
i also do NOT think it’s a loose reflector.
Lose reflector.
Sounds like that poorly mounted tire is hitting the fender.
Turn bicycle upside down, turn wheel and should find issue.
Your rim is pooched.
When I hear a sound at each revolution, I instinctively tell myself, this will be an easy fix…
Triplets?
Something plastic is touching the spokes
disc rotor may be bent ever so slightly in one spot.
Auf das Schutzblech tippe ich auch..
1 – sounds like either the reflector is clipping something like the rack or the wheel is clipping the fender.
2 – stop riding that bike and mount the tire correctly. A bulge like that means the tire is not seated properly.
Come on now.
My bet:
You just recently adjusted tension on your belt drive. You moved your tire rearwards just far enough to have the tire contact the fender.
Move the fender farther out on the sport stays maybe a millimeter will do it.
Never mind the tire.
Although that’s equally easy to deflate and try to remount properly.