Join Date: Jun 2010
Location: Post Falls, Idaho
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Grinding sound when freewheeling (<100 mile Trek 7.3, video included.)
Hey guys. She's due for her 100 mile tuneup this weekend, but I've recently noticed this. Honestly, I Can't remember if it was always there, and I just noticed it, or if it developed. Regardless, when freewheeling, this nasty grinding sound persists. It's not the fenders, they have 100% clearance. I think it has something to do with the hub, as you can hear it when I'm backpeddling at the start of the video. The audio quality isn't amazing, it's really a smooth grinding sound in real life...
I assume it's not normal, of course. Really just didn't want to sound like an idiot when going into the LBS for the tuneup, and wanted to know what this really is first.
In the audio, it almost sounds like rubber // the tire is rubbing, but that's not the case. Besides, obviously then it would persist when pedaling, as well as wouldn't exist when just reverse pedaling.