Brand new bike, chain lubed. My drivetrain would be silent if it wasnt for this, maybe i need to play with the B tension screw? Any help greatly appreciated!
Chain sticks to front chainring a little
byu/lol_y_am_i_here inbikewrench
by lol_y_am_i_here
6 Comments
It is called chain suck. How old is that chainring? It still looks in good shape. Generally, it happens after the previous chain and chainring had worn too much, but that’s usually after having had several chains on there.
Looks like your narrow-wide chainring isn’t meshing with the appropriate parts of the chain. The wide teeth on the chainring should be engaging the chain with the wider outside links.
Just take the chain off the chainring and make sure it’s meshing correctly
The chainring teeth will expand on the leading face. If you look at the teeth, you may see that happening. If your chain is a tight fit, this can happen. You can usually scrape it off with an reactor knife, or file it off. Use eye protection if this is the case.
New chain old cassette?
I’ve had this happen when new XT chainring did not like the deore 6100 chain bike came with. Changed to slx chain and all good since.
If everything is brand new, I had this exact issue and none of the jibronis on reddit gave the correct answer. None. LBS gave me the correct answer, literally in seconds. Brand new, mid to higher end matching components are built better and have less tolerance for machining errors. The teeth on your front chain ring are meant to perfectly mate with the chain, it’s sticking because it hasn’t been perfectly seated yet. Once it’s seated, it will ride smooth and reduce the chances of the chain popping. Ride around the parking lot, shift to the smallest rear cog and from a stop, give a good hard pedal to put some torque down on the cranks. That will help seat the chain into the chain ring. A few times doing this and you’ll be good to go.