C.dale Road Tandem 2 - odd/weird noise
I have a c.dale Road Tandem 2. it has disc brakes on it - BB7/200/200 F/B. for some odd reason, there's this high pitch rubber sound-alike noise that comes when I pedal - the noise appears to come from the stoker/back wheel end and is consistent as opposed to a few times per oscilation. it goes away when I cruise the bike without pedaling. I was guessing it could be rotor rub at the back but that would sound somewhat metallic. its not your typical metallic sounding sqeak or tick or creak which i'm having.
Kinda loss what it could be at the moment. I've done some diagnostics and as i mentioned earlier the sound only comes when I pedal, regardless whether my crank/drive train engages the wheel hub or not. Any idea what could be causing this ?