Not only was shifting improved, but it allowed me to tighten the high limit a LOT more than I was able to before. Would that be a normal response to the reduced flex on the cage? Also, how does the chain catcher contribute to flex in the FD?
I am going to go out for a longer ride in an hour or so to see if the problem is resolved.
Thanks for the suggestions. I will let you know if that resolved the issues.
Also using the stock support plate, have it parallel, and run QRings, no issues with shifting. Running 9070 Di2.
Interesting removing it solved the problem.
I did notice installing the chain catcher it comes with a short bolt and a long bolt. The long would have bottomed out on something inside the FD without fully tightening unit to the bracket. Had to use the short bolt.
2013 BMC TMR01 custom build
2013 Cannondale F-Series 29'er, Carbon 3
2012 Cannondale CAAD10-1 custom build, 14.06 lbs
1980 Palo Alto custom build
I snapped a few pics as was hoping you guys could check to see if I have parallel set correctly.
I am using a DA Cassette and Crank but 6800 chain. Would a 9000 chain have the potential to help?
I also checked the torque on all the chainrings and checked for play in the BB. Both good.
My symptoms now are just a tad different. It just seems that on occasion my chain will chatter/grind/etc for a brief moment before grabbing the chain ring and riding up on to the big ring.
So basically I've learned to always have the largest/highest tooth coming around under the FD cage almost every time. Well, I try, not possible in every circumstance, but 80% of the time I do that.
Setup parallel, 9070 Di2. CN-9000 Chain, Sram OG-1090 Rear Cassette. Height is about 1mm above the very largest tooth at the biggest point of the QRing.
Keep working with it and tweaking it, you will get it eventually.
Last resort, might try different chainrings as a test...might be the issue. The way it is machined/ramping etc...could be causing the intermittent issues. I don't think there is such a thing as perfect every time shifting after 30yrs of riding. But I must say this new 9070 Di2 is about as close as it gets.
1. I am running a 52/36 crank. The bike I test rode (where shifting was flawless) was 53/39. Does performance suffer that much on a compact, or in this case semi-compact, crank?
2. I was cleaning the bike up last night while I was making more adjustments and checking for other possible issues. I also had someone else ride it who immediately said something was off with the front shifting. When cleaning, I noticed a lot of metal shavings coming off the chain. I have never experienced this in 12+ years of cycling. The DA crank already looks to have some wear on the inside of the small and large chainrings. There are less than 200 miles on the crank/rings, which is where I suspect the shavings are coming from. Is this normal on a new crank?
2. This is not normal.
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