19-07-16, 10:42 PM
Mine had a raspy noise that was intermittent the other month. Couldn't tell what caused it when riding. Sometimes it did it when cornering but not always. Acceleration deceleration intermittent. Riding at constant speed it was fine. After giving it a once over at work I noticed my front sprocket retaining ring wedged in the frame. My sprocket nut threads had worm smooth. New nut and it's fine. I did notice spinning the back wheel in reverse made a racket but not forward...
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