Originally Posted by
AnkleWork
Sorry, I can't hear 70dB so far away. Maybe just ride it. If it gets worse you'll eventually find it easily.
Agreed. Hopefully problem can be located before it breaks. Likely to be inconvenient when/where failure occurs though.
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.