Trying to adjust my ultegra 8000 front der but the braze on seems too high. I can't get the outside of the cage to come down to 2mm above the big ring teeth. Thoughts?
by teakettle87
Trying to adjust my ultegra 8000 front der but the braze on seems too high. I can't get the outside of the cage to come down to 2mm above the big ring teeth. Thoughts?
by teakettle87
5 Comments
I’m also struggling to get the set screw to snug up such that the cage aligns with the chainrings. The braze on seems to have no rotational adjustment.
As long as the chain doesn’t rub the bottom of the mech in the most smallxsmall gearing you reasonably use it’s fine. You should avoid cross chaining so I would say a little bit of rub in the smallest gear or two is ok if not ideal. That gap is bigger than spec but not necessarily an issue if it otherwise works.
Idk about the rotation thing, it looks fine to me, all the parts are there and it’s a standard mount. Sometimes the backside of the mount where it meets the mech gets crusty and it only wants to tighten in one specific spot, maybe try cleaning up the interface?
can’t really tell if it looks too high, pics can be deceiving. i like to use a 3mm allen to measure the gap. as for the rotation, i would be reluctant to force anything. it might help to get the chain out of the way to make the adjustments.
Yes. A bit too high. Should be 1-3 mm from the top of the teeth, looks to be about 5. If it shifts ok after you make the rest of the adjustments, I wouldn’t stress too hard about the height. I’ve seen bigger gaps on customer’s bikes that shifted fine.
For rotational adjustment there is a hidden screw near the limits
It’s [page 9 on the dealer manual](https://si.shimano.com/en/pdfs/dm/RAFD001/DM-RAFD001-05-ENG.pdf)
It’s slightly elevated. Might work. Try it out.