I just can't figure out what this vibration and weird noise coming from the crank/bottom sheet area. It seems to be only on the small chainring and it is prominent when I load the pedals more. If I take it slow and apply less pressure to the pedals, it stops.
There is nothing rubbing at all so that is eliminated already.
I have Sram dub bottom bracket, and I haven't heard good things about it, so my guess is the BB is just garbage, even though it is brand new.
It is a cervelo soloist with 12 speed sram red axs groupset. Chain is waxed. Ask me anything you need to.
Help me figure out what this issue is
byu/brsmr123 inbikewrench
by brsmr123
1 Comment
I’m going to guess your chain is kinda worn and doesn’t match how worn your little ring is. Especially if you don’t use the little ring much when riding outside.
Or maaaaaybe it’s the chainline being weird with the Zwift cog. But I’d more water on wear.
I get a similar noise on my trainer when pedaling quite hard, and my drivetrain is pretty worn. (I’m not bothering to replace it, though, because the bike hasn’t left the trainer in 2.5 years and the drivetrain is worn and due for a replacement so I’m letting it all wear together.)