Dura Ace C24 “chirp”
09-10-19, 01:23 PM
#1
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Dura Ace C24 “chirp”
Emonda SL6 developed a “chirp” associated with wheel revolution on last night’s ride. Nothing remarkable happened along the way. It is not real loud, guess about 65-70 dB. There are 12k miles on this wheel set. When spun-up unloaded there is no noise.
Swapped out front wheel and noise went away.
No debris seen in tire.
Carbon, stickers, spokes & nipples “look” ok.
Inspected/re-lube/adjusted bearings, still noisy.
Swapped QR and still noisy.
Where do I look next?
Swapped out front wheel and noise went away.
No debris seen in tire.
Carbon, stickers, spokes & nipples “look” ok.
Inspected/re-lube/adjusted bearings, still noisy.
Swapped QR and still noisy.
Where do I look next?
09-10-19, 01:34 PM
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Emonda SL6 developed a “chirp” associated with wheel revolution on last night’s ride. Nothing remarkable happened along the way. It is not real loud, guess about 65-70 dB. There are 12k miles on this wheel set. When spun-up unloaded there is no noise.
Swapped out front wheel and noise went away.
No debris seen in tire.
Carbon, stickers, spokes & nipples “look” ok.
Inspected/re-lube/adjusted bearings, still noisy.
Swapped QR and still noisy.
Where do I look next?
Swapped out front wheel and noise went away.
No debris seen in tire.
Carbon, stickers, spokes & nipples “look” ok.
Inspected/re-lube/adjusted bearings, still noisy.
Swapped QR and still noisy.
Where do I look next?
09-10-19, 01:49 PM
#3
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Join Date: Apr 2015
Location: N. California
Posts: 158
Bikes: Trek Emonda SL6, Santa Cruz Tallboy 27.5+
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Run to failure?
Edit: Found it! Turned out to be the valve stem flexing against the rim. Put on a stem nut for a test & the noise disappeared. Removed nut. Let air out and pumped back up. Quiet & ready to ride.
Last edited by BarryVee; 09-11-19 at 03:50 PM.
