Zwift Hub scraping noise

Hi everyone, I’m hoping someone can help me with an issue I’m having with my Zwift Hub.

My Zwift Hub is currently making a ‘scraping’ noise on certain parts of the rear hub as it spins. It sounds like there’s a part of the black wheel attached to the cassette that’s intermittently scraping on something inside the hub’s housing. This noise is still present when my bike is taken off the Zwift Hub. I have a video of the issue but Zwift forums won’t let me include links in my post as I’m a new user. I’ll try including the link as soon as I’m able to.

It doesn’t make a noise when I turn the rear hub anti-clockwise (also depicted in the video).

I’m concerned there is something wrong with the hardware in the Hub, and I’m reluctant to begin taking it apart to try and see what’s causing the scraping sound.

I’ve emailed Zwift support for their advice and wanted to post the issue on this forum to see if others had experienced something similar or are aware of a solution.

Many thanks,

If you go to the Zwift Shop category here you will see a whole host of threads covering the Hub and its various noises. Most end up getting returned.

1 Like

Spinning the hub without a bike should be silent both ways you spin. Get a return going.

Thanks for your message Michael. Zwift have been in touch to begin processing a return with me after sending them the video.

Hi Sam, presumably you got a replacement in the end. Did the replacement confirm that the sound you were hearing wasn’t “normal”? I’m hearing a scuffing sound, even without a bike attached confirming it’s coming from the hub itself. I wouldn’t say “scraping” as that implies some sort of scratching happening somewhere, I’d say it’s between that and brushing hence “scuffing”. My suspicion is either misalignment of the disc that rotates, or one of the internal cables pushing up against it (I can sort of see a red wire when shining a torch down the very narrow gap that could be the culprit). I’ve already had my unit replaced once, and really don’t want to have to re-pack and unpack and setup another one!

Assuming the noise is coming from the trainer as you say, I think it’s time to contact support and deal with whatever results from that.

Hi Lewis. Yes, a replacement hub was sent and is holding up fine so far. Hope you manage to sort yours out

Thanks for the replies both. After finding this other thread it seems clear that it’s what I’m facing too:
Zwift hub “belt” Crooked?. TLRD; the belt is misaligned/slipping and rubbing on the adjacent plastic.

On one hand it’s incredibly refreshing how little friction there is (ironically) with Zwift’s support and getting replacements organised, but also quite telling about how aware they are of the disappointing effectiveness of their quality controls.

Let’s just hope that third time’s a charm!