Hi,
I recently bought a new pre-assembled gravel bike but I’m having a weird sound at the highest gears.
The sound only occurs at the highest 4 gears, big wheel in front and the smallest four wheel at the back. What I’ve also found is that it’s only occurs a part of the pedals way around, it seems to be more prominent when the right pedel goes from twelve a clock to about four and then silent for the rest of the rotation.
The higher gear I put in the louder the noise gets, and the sound also increases when I put a higher torque on the pedal.
Could it be that the big gearwheel in the front is partially skewed or miss aligned in anyway as the sound only occurs partway of the rotation?
Happy to provide you with more information if necessary. 🙂
Grinding sound at high gear
byu/Weak-Sandwich8060 inbikewrench
by Weak-Sandwich8060
5 Comments
It seems to come from the front of the drive train but I’ve not been able to locate why.
sounds like your chain is rubbin the front derailleur. i suggest you follow the park tool guide to adjusting front derailleurs [https://www.youtube.com/watch?v=ZNG7g83lI-s](https://www.youtube.com/watch?v=ZNG7g83lI-s)
Sounds like your front deraileur could use adjustment. Does it grind in other gears?
Chain is rubbing on the front derailleur. Try using other gears in the back to see if it helps and then you can try to adjust your front derailleur until it stops making noise.
I did fight with noise like that on my road bike. Despite following the tutorials and knowing how those things work, I wasn’t able to fix it for years 🙁 For this summer I finally decided to completely ditch the front derailleur and moved to 1x setup.
With my MTB the 2x setup works brilliantly, silent and smooth.
Anyway, you would need a bit more tension on the front derailleur cable.