I’ve recently noticed a problem with the front shifting on my 2019 Giant TCR Advanced 0 equipped with a Di2 R8050 as it doesn’t shift down under “load”. It doesn’t seem to be “pushing” the chain far enough and I really have to freewheel for it to work. On the other hand it can shift up under load (even when standing on the pedals) and everything else works fine (including micro adjustments in the front when changing gears in the back) so it’s hard to understand what the problem might be.
Backtracking a bit, my chain got stuck prior to that and I noticed shortly thereafter that one link was bent. After removing it (had to remove two links in the end) the chain looked too short so I got a new one, a Shimano 105 11S chain but I can’t imagine not using an Ultegra chain would be a problem ? I’ve done the adjustments several times in the front and made sure the chain tension was at the lowest possible B screw setting on Small/Small and nothing seems to help.
Has anyone seen that problem before ? Thanks !