jharris wrote:
On bumpy roads, I get a little rattle from the Di2 bar end shifters
What up with that? Anyone have a cure?
It depends on whether these are basebar or aero extension shifters. As mentioned above, some models have a Allen head bolt to tighten the wedges. The latest aero extension, single button 9160 shifters have a somewhat tricky collet setup that is tightened by hand.
If this rattle is coming from your basebar, rim brake shifters there can be noise where the brake cable connects to the levers if the brakes don’t have a strong return spring.