Hello, the title pretty much sums it up. It’s absolutely fine in the big dog, and is also behaving in the lowest 2 or 3 gears when in the small ring.
As I understand it, the chain is under higher tension in the small ring, so it could highlight a wear issue… but I wouldn’t expect the chain to jump down and back up as a result of wear. My chain is past 0.5 (but not at 0.75), and I’ve ordered a new one. However I’m wondering whether I need a new cassette too, or have I done something wrong in setting up the shifting?
lets see some pics of the teeth,… if they look like shark fins you need a new chainring.
I’m almost ashamed to post these pics, but just got back from a ride and it’s pretty dirty. I usually keep things pretty clean. Included the cassette and front ring for reference even though it behaves in the big ring.
First, shoutout for calling your big ring the big dog. I’m going to start using that terminology.
Second, put your chain in small-small and take a photo of your drivetrain. It sounds like it could be a chain length issue.
I think you’re probably onto something @SeanHurley - it’s very slack in the 39/11.
Small ring - 39/11
And for ref…
Big dog, big cog - 53/11
hmm, that actually looks about as slack as it should be in small-small.
I have seen some pretty extreme derailleur positions on other people’s bikes in big ring/big cog combo that made me question if my chain was too long. Arghh - now I really don’t know. I’ll see how it runs once my new chain arrives.
Chainrings are a bit toothy, could be tolerance stacking, every part is worn so together it is a problem, a new chain will buy some time but I would consider changing the chainrings as they also appear to be a bit wallowed out where the chain rollers sit as do the smaller cassette cogs. the new chain may work initially but you will eventually be in a vicious cycle until you change them out all new
Worth checking derailleur hanger alignment with a gauge if you have not done so already?