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So, the bike is the first I've built with 9100 (has the shifters, front and rear mechs). And while the mechs are definitely a new breed (especially cable attachment and adjustment for the front, and the attachment for the mech itself in the back), there's no accounting for the problem I'm having.
In short, if I adjust the cable tension via barrel adjuster so that it can shift into the large cog (happens to be a 28 on this bike), then it won't shift into smallest, or will only do so after a full minute or two of clatter.
If I adjust tension so that it shifts into and out of small without problems. Then it won't go onto the large cog, even in small chainring.
It's odd. This is the kind of thing that normally you fiddle with and then after an overnight hiatus to allow the cable to stretch, you take two or three stabs at adjustment and bingo, no problem.
But I've now tried 40-50 times to get the adjustment right in the house, and many more outside riding and stopping, riding and stopping, making tiny incremental adjustments.
Theinitial setup Shimano recommends -- shifting to from smallest to second-smallest, then adjusting by ear to put the mech close to shifting to third-smallest doesn't even faintly come close.
The history:
Hangar LOOKED straight so the first time I simply installed the mech...tried to adjust repeatedly with the barrel, detached and re-tensioned the cable half a dozen times. Then tried with the barrel agin multiple times.
Then rode it 60 miles, with multiple efforts at adjustment. Then removed it, checked and made slight correction to the hanger alignment with the standard Park tool.
Then REINSTALLED it, making sure to go completely per instructions for everything from cable housing length to b-screw adjustment.
High limit is set with jockey wheel centered to outer face of small cog, and low limit is set to center of large cog.
I've ridden the bike about 100 miles now, and gotten off repeatedly to adjust it slightly up and down, trying to find a sweet spot that doesn't exist. Making adjustments at no more than 1/8 turn at a time.
Just for context, the cables are routed internally through the bars, most of the downtime, then emerge and go under the BB etc so there's a fair amount of bending though go through. But they are the coated Dura Ace cables and latest housings, and don't have any unusual friction that i can detect.
This is maybe the 30th rear mech I've installed over the years on various bikes, from Campy SR in the early 80s to every variant of Di2 up through 9070. So I'm not completely clueless, but up against a wall for sure.
It's almost like its a 10.5 speed setup.
Any thoughts?
In short, if I adjust the cable tension via barrel adjuster so that it can shift into the large cog (happens to be a 28 on this bike), then it won't shift into smallest, or will only do so after a full minute or two of clatter.
If I adjust tension so that it shifts into and out of small without problems. Then it won't go onto the large cog, even in small chainring.
It's odd. This is the kind of thing that normally you fiddle with and then after an overnight hiatus to allow the cable to stretch, you take two or three stabs at adjustment and bingo, no problem.
But I've now tried 40-50 times to get the adjustment right in the house, and many more outside riding and stopping, riding and stopping, making tiny incremental adjustments.
Theinitial setup Shimano recommends -- shifting to from smallest to second-smallest, then adjusting by ear to put the mech close to shifting to third-smallest doesn't even faintly come close.
The history:
Hangar LOOKED straight so the first time I simply installed the mech...tried to adjust repeatedly with the barrel, detached and re-tensioned the cable half a dozen times. Then tried with the barrel agin multiple times.
Then rode it 60 miles, with multiple efforts at adjustment. Then removed it, checked and made slight correction to the hanger alignment with the standard Park tool.
Then REINSTALLED it, making sure to go completely per instructions for everything from cable housing length to b-screw adjustment.
High limit is set with jockey wheel centered to outer face of small cog, and low limit is set to center of large cog.
I've ridden the bike about 100 miles now, and gotten off repeatedly to adjust it slightly up and down, trying to find a sweet spot that doesn't exist. Making adjustments at no more than 1/8 turn at a time.
Just for context, the cables are routed internally through the bars, most of the downtime, then emerge and go under the BB etc so there's a fair amount of bending though go through. But they are the coated Dura Ace cables and latest housings, and don't have any unusual friction that i can detect.
This is maybe the 30th rear mech I've installed over the years on various bikes, from Campy SR in the early 80s to every variant of Di2 up through 9070. So I'm not completely clueless, but up against a wall for sure.
It's almost like its a 10.5 speed setup.
Any thoughts?
