Yep I saw that tab on the inner chainring.. On my second or third attempt at AXS 2x I made sure that was aligned properly.. I had the 2x working for about 4 rides, until it dropped to the inside again jamming my chain against the frame..TimWit wrote: ↑Mon Jul 12, 2021 7:06 pmHey gSporco,gSporco wrote: ↑Sat Oct 03, 2020 6:20 amIm good with that entire list however these are the items that have variations or at least un answered questions:woodyvalentine wrote: ↑Sat Oct 03, 2020 4:28 amI don't and won't use the auto/compensating mode. Just manual front shifts. But in my set up attempts tips:
-make sure cranks are installed correct/torqued
-make sure chain is correct length and power lock is locked
-make sure cassette and thru axles are installed correctly and tight
-make sure rear derailleur limits are set and good
-then move on to front derailleur: height, alignment, high limit, low limit, then re check both again.
-I'm using the smallest flat wedge and it fits
-this seems to shift better than the systemsix go
-this is on my Aspero as well
-if all else fails bring it to a shop
1. Chain length: what's correct? Sram says size it over the big-big then have 1 outer and one inner over lap..
I tried srams way and it seems like the chain dances in between the CRs with no bite to get up to the big CR.
To make it work this way I had to gap the outboard FD by 2 mm to force the chain over. Then once you pedal fast it theows the chain on to the pedals.
In 2 outer and 2 inner for more slack and this seemed to help with a more normal 1mm outboard gap, but still suffered chain drop to the outside
2. The height of the FD: some say short tooth of the big ring right at the line.. some say above the line some say slightly below the line... that's probably 2.5mm of variance between users. So who knows what's optimum??
3. Chain line: this i feel shouldn't matter much but some people say checknit. Well i had a probl with my preload nit which made the crank move 1-2mm side by side. 6 post ago someone mentioned that and i fixed it and the crank is perfect. Torqued, spins freely and now side tonside action. As for the spacing? Well DUB BB do not come with spacer nor re they recommend. Mine has an appropriately sized drive side and non drive side bushing which has a fixed spacing for each side.
The FD should not be this difficult to setup. I wonder if its possible the FD during its initial push, pushes to much before it comes back. Maybe it's faulty? Who knows.
Lastly, in the stand if you are standing facing the front of the bike and perform a front shift, watching the way the chain climbs on to the big ring is weird. It comes on at an angle where at the top of the ring it's coming in from the right but as the crank turns about half way, the chain at the bottom of the stroke is already coming off towards the pedals. Hard to explain but the chain is engaging on an angle like a back slash "/". When im more determined ill take a video and post it...
I went through the process of creating a new account to be able to post here, as this thread has been very helpful in helping me figure out the FD issues with my Sram Force FD with 46T/33 crankset.
Coming from the Ultegra Di2, I was in the process of converting the 1X drivetrain on my new bike to 2X with my new AXS system a few nights ago and my issue was exactly as you described: chain dancing on the big ring when shifting and often spilling over to the pedal side. No amount of adjustments and tweaks to the FD helped. The culprit I found was my 33 inner chainring was not installed correctly. There is a little pointy index tab that must be aligned with the crank arm during the install. I discovered this solution on a Facebook group that was the main culprit for all my FD problems and it was spot on. Now the shifting from the small to big chainring was crisp and immediately seated the chain into the big ring without any dancing. I couldn't believe that one little detail I overlooked was the cause of all my FD shifting woes.
I know this thread was created last year and you have probably moved on. Hopefully, this will be of some help to lurkers like me looking for a solution to the Sram Force FD issues on the internet.
Tim
For me I think its either a BB alignment of the force AXS rings ramps stink... The other member here who has had great success has used shimano and campy cranks with no issues.. Maybe the Red AXS rings have better ramps.. but I dont know.. I am sticking with 1x on my Aspero ..
I did pickup a Cervelo S3 a few weeks ago and its equipped with Ultegra Mechanical 2x.. I cant believe how well the FD shifts.. no chain drops, even if I intentionally try to drop the chain with poor shifting.. I really dont know what the culprit is.. I am almost tempted to install a AXS FD on the Ultegra to see if I can isolate it to the chainrings..
If I keep the S3 Ill have to decide if I want to go 1 or 2x AXS.. I love the shimano smoothness, just not a fan of mechanical anymore since I am not accustom to it..