Shimano Ultegra And Dura
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These 1x setups are becoming more popular, particularly with broad ratio 12-sprocket rears becoming common. Tomas, you’re correct, you cannot use 6770 components with 7970. The most cost-effective answer is to create a search notification on eBay and wait for the part you have to be listed. If you have the budget, replacing every thing with a more trendy system is a worthwhile funding. You may need a special rear wheel/hub to go to 11-speed or 12-speed. my RD-R9150 and FD-R9150 have been shipped and are somewhere in the world proper now.
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Disconnect the entrance and see if there’s nonetheless battery drain. Ebay.com is probably one of the best place to search out replacement components. If it’s in your budget, upgrading to one of the newest Di2 methods would probably be value it. I would assume that the setting is stored in the rear derailleur itself, however I can’t say for sure. My guess is that your rear derailleur is starting to fail and that is causing the problem. I’m unsure if it’s a mechanical or digital failure, but either method, attempting a substitute derailleur might be your best finest.
Follow the steps beneath to properly align the rear derailleur with the rear sprockets. To examine the battery charge remaining, press and hold any shifting swap for zero.5 seconds or more. The amount of battery cost remaining might be indicated by the light on Front Controller A Junction. It will not be attainable to charge the BTR2 inside battery utilizing the BCR2 USB charger until you additionally downgrade the firmware of the BCR2 USB charger as properly. Shimano e-Tube Software v2.6.zero will replace battery firmware to v3.0.5, and will not allow the RD-6870 to work with a FD-6770 setup.
Automatic trimming of the entrance derailleur position because the rear derailleur strikes backwards and forwards between the smaller and larger gears. This eliminates unintended contact between the entrance derailleur and the chain. Greatly improved shift high quality, especially for the front derailleur chainrings, allowing shifting beneath full power with nearly no probability of a dropped chain. Yes, you possibly can disconnect and remove the entrance derailleur without issue and the rear will still work.
Maybe you can repair the crash-broken derailleur with elements from the one with damaged electronics. James, the very first thing to verify could be the wiring. Make positive that there are no shorts between any of the cables. But my guess is that it’s probably considered one of your derailleurs.