My chain refuses to switch to smallest cog-wheel of the cassette, when cycling (but can do it when bike is on the stand).
It happens regardless of whether I'm using small or large chainring of my crankset.
Rear derailleur setting is fine. I'm pretty good at tuning.
With zero load (bike on stand) switching works (not instantly, but it does). When riding (even with small pressure on my pedals) chain makes rattling noise, but refuses to go to smallest cog-wheel.
I re-assembled cables twice, changed caps on the cable housing, made sure there is no friction anywhere. Problem persists.
Gear cable for DA-9000 rear derailleur is designed with very sharp angle at tightening bolt. I was surprised when I got it and suspected a problem. Well, it happened to me, but I have not found other references on the web. Is my rear derailleur faulty? What else could it be...
Shifting to all other cog-wheels of my cassette is fine, except the smallest cog.
i know you said you are familiar with setup but have you tried setting the limit a tad lower?
is your hanger possibly bent?
yup, my chain is installed with wording facing outwards.
yes, i tried to loosen tightening bolt of rear derailleur, the one controlling how far towards smallest cog RD moves. I loosen it as much as I could. If I loosen any further, chain starts to rattle.
I am not sure if hanger is bent. is there a way to check it?
With high limit screw, you should align the upper derailleur pulley 1-2mm outside of the smallest cog.
But you said that you did this, and when you do it more, you have problems more.
So in that case, I would remove my chain and RD, and start setting the derailleur from the very beginning.
1. Checking hanger. Mostly they tend to bend inside. When you look from behind, you usually can see it and can correct it with an adjustable wrench.
2. High and low limit alignment without chain and cable.
3. Up and down alignment. (3rd screw on derailleur)
4. Checking chain length and installing chain
5. Making the cable alignment, tensioning.
6. Going on ride and with ferrule adjuster final fine tuning.
So, like I said, try retightening the cassette retaining ring.
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs
I'm having the same issue. Have adjusted limit screws, replaced hanger (confirmed new is straight), cassette, chain, and cables all with Shimano spec and still have the same problem. Also swapped wheels and still have same issue. Rear shifts are ok in repair stand, but doesn't want to go into the 11 tooth cog when riding on the road.
Expert mechanic at LBS cannot resolve either.
Thanks for any feedback!
You said that you replaced the hanger, but was the new hanger actually checked for proper alignment? New hangers are just as prone to being out of alignment as old ones.
It's still under warranty so going to ask LBS to take up with Shimano, and really just wondering if anyone else besides the few on this thread have this issue where it shifts ok in stand but not on road.
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