Hello,

My chain rattles. Here's the situation:

I am running a newly installed groupset (Shimano Ultegra R8000). When I have my bike in the work stand and rotate the crank, with the chain in any cog from 1 to 4, in either chainring, the chain makes a horrible rattling noise. Like someone shaking a box of rocks. What I've done so far:

1. Check to make sure the chain isn't rubbing against any part of the derailleurs or frame.
2. Checked chain length
3. Installed a different chain
4. Installed a different cassette
5. Checked chainring bolts
6. adjusted rear derailleur B-screw, limits, and tension
7. checked that hub and cassette were tight
8. lubed chain
9. checked that crankset was installed properly, with no lateral play
10. checked that bottom bracket was installed properly and bearings were good
11. tried different set of wheels

Nothing seems to work. Bear in mind all parts are brand new and this only happens when in the first 4 cogs. I am using a KMC X11SL chain. It should also be noted that shifting performance does not seem to be affected.


Does anyone have any suggestions?

Thank you.