Shimano Ultegra dual control shifter cable replacement

Cable routing through a Shimano ST-6800 dual action leverset to the derailleur.
Similar models are ST-4700, ST-4703, ST-5800, ST-9000, ST-9001 found in the Tiagra, 105, Ultegra and Dura-Ace groupsets.
Symptoms of cable failure are gradual, include chain not changing gears on cassette when shifter is operated, derailleur not moving at all when shifter is operated. Braking is totally unaffected.
Shimano Ultegra dual control lever
si.shimano.com...
Shifter mounting bolt 6.0 - 8.0 N·m {53 - 71 in. lbs.}
Shifter housing screw 0.20 - 0.25 N·m {1.7 - 2.2 in. lbs.}
Derailleur cable clamp bolt 6 - 7 N·m {53 - 62 in. lbs.}

[@madrabbit64]

My rear derailleur cable did this on my last 40 mile ride…..shifting had become erratic and it finally gave up. It had been awhile since I’d done one of these. Thanks to your video I went ahead and did all four cables just in case. Thank you, great video.

[@srknight307]

Used this video yesterday, saved me loads of time thank you! I needed to remove the lower piece of plastic too to get the broken cable head out.

[@TL243]

ok not much new here except one key piece for me. The finger nail pull back of the flap without removing it starting at 6:10. Man, that saved me so much effort and time.

[@caahacky]

Excellent video - just the detail I need. Thank you so much.

[@richardallen3993]

Thanks, mate. I just found your video and resolved my problem exactly as you've demonstrated. You've saved me an expensive trip to a bike shop. Top bloke :)

[@theoverengineer]

You're welcome!

[@luisceja8121]

Woooooooow save me lot of money two shops told me I needed new shifters. I remove the boat like suggested in the video in the old cable was still there. Oh my God thank you for this video.

[@theoverengineer]

Glad it helped!

[@Bushviking]

Excellent! You are a lifesaver, i managed to get that broken cable head out thanks to this video. Many thanks!

[@theoverengineer]

You're welcome!

[@tommyc.4251]

Thanks for the excellent video! My new years day project before kids wake up 😁

[@WasabiBunny]

This was really helpful, thanks for posting. Feel like I need to do my lawn now, not sure why 😉

[@theoverengineer]

Glad it was helpful!

[@frankreiter5100]

Perfect explanation. I fixed everything by my on also the rests of the broken cable. Thank u

[@robertkennedy7649]

Followed the video today made the job simple thank you for sharing

[@cosycamperconversions]

Great video thanks

[@Rangsit997]

This is very helpful video. Thank you,

[@turbofranz9334]

Very usefull close ups!!! Thank you!

[@gunruncycle1503]

Thank you a really good video, and nice explanation

[@theoverengineer]

Glad it was helpful!

[@lonniecu6726]

Thanks so much got it fixed

[@jonathanrogers611]

My screw has rusted, i cant open that bottom panel. Any tips? Great video

[@theoverengineer]

Oil? + patience ... awww ... it's a tricky one. Just don't butcher it, you need all the metal remaining in the screw head to turn that thing, eventually ...

[@hktkferg]

Very good thanks.

[@tonajamal]

Good

[@apocalypsee94]

Great video, Thanks!

[@theoverengineer]

Glad you liked it!

[@roberttyszko6138]

Here is the next video to show to set tension?

[@caahacky]

Ah but now I have removed the broken end of the cable - like yours - from underneath, but the ratchet wheel will not turn.

[@theoverengineer]

Ouch. Keep looking, a bit of broken wire strand is stopping it.

[@caahacky]

@@theoverengineer I found the problem! The rubber hood cover was contacting one of the ratchet pawls and stopping the wheel turning - because I had removed the round plastic cover underneath to get the broken end out. Thanks again for the excellent video.

[@usafmd]

I had the same problem. Turns out the rubber hood needs to be flipped back for it to work! Thanks to my friendly LBS!

[@johnbetus378]

ALR is not a carbon frame

[@floridacycling4842]

Excellent video but man get yourself a workstand! I cringed when you turned that bike upside down.

[@theoverengineer]

(Was done at friend's place, I only carried the tools I needed. And camera)

[@robmca9265]

Too slow, not requiring such a long video.

[@theoverengineer]

I know, was too lazy to edit raw footage down. Thanks for visiting!

[@milkdud3618]

Great job many Thanks