I just received a bike from a bike shop. It has a GRX800 front derailleur (FD) and rear derailleur (RD). When taking a look at the derailleur setup to check if it is alright, I found something very odd.
When I am on the outermost chainring and release tension from the RD (shifting up, to the smaller sprockets), the FD moves significantly inwards (as if I'm shifting down). In fact it moves so much, that I have to choose between the highest gear working, or the T-trim position working.
- Before going back to the dealer I'd like to know if this might be a feature I'm not aware of?
- If not, what could cause this?
- Maybe "entangled" shifting cables within the frame?
- If yes, why would this be? I would rather expect lower RD tension to increase tension on the FD follow the chain which now moves outwards.
I'm happy to hear your thoughts on this!
EDIT: Here is a video of it.
EDIT#2: I returned the bike to the bike shop, but was able to take a photo of the internal routing through a little hole in the frame which I didn't see before. Here it is, for you to look at :)