Shimano M8000 shifter doohickeys

[SurrealTiggi]

Hi all

 

Just recently picked up a M8000 11s rear shifter, and found two bits in the packet that I'm clueless about.

The left one is hard plastic and the second is rubber, and both have cable holes.

 

I'm worried I'm mucking up the shifter installation by leaving them out, but haven't the faintest where they go, if anywhere.

 

Any ideas? Haven't been able to find any other reference to them online.

 

 

Thanks in advance!

[GrantRH]

Those look like the plug tools for the Di2 wires?

[Lance Roberts]

Those parts normally come with a new set of gear shifter cables.

 

I had a frame once with internal cable routing and the hole at the top where the cable entered the frame was a larger diameter than the end cap on the cable outer tube. That meant the cable had nothing to sit against and it couldn't shift gears.

So I used one of those caps with the rubber "tounge", as they call it. It has a lip on the one end which is bigger than the diameter of the frame entry hole and that created the tight fit and enabled shifting.

 

I'm not sure if that's what they are actually for, but it worked for me.

[SurrealTiggi]

I've also routed it internally but had no similar issue with cable tightness since the entry points through the frame have rubber grommets to make it snug.

 

Though now that you mention it, I think I figured it out. Where the cable exits the housing and connects to the rear derailer there aren't any grommets, it just exits the frame, and before the cable is exposed there's a section where it has to sit tightly in the rear derailer. I think they're just different adapters since for me the end caps work fine.

 

That being said, it feels like the hard plastic one goes somewhere, so I'm going to see if it fits in between the shifter entry and cable housing.

[Eldron]

I've also routed it internally but had no similar issue with cable tightness since the entry points through the frame have rubber grommets to make it snug.

 

Though now that you mention it, I think I figured it out. Where the cable exits the housing and connects to the rear derailer there aren't any grommets, it just exits the frame, and before the cable is exposed there's a section where it has to sit tightly in the rear derailer. I think they're just different adapters since for me the end caps work fine. ImageUploadedByTapatalk1440830183.866112.jpg

 

That being said, it feels like the hard plastic one goes somewhere, so I'm going to see if it fits in between the shifter entry and cable housing.

Its to stop dirt getting into the cable housing. The plastic cap goes on the end of the outer and the rubber seal slips on the other side.

[camelman]

Think they are one and the same. Should go there where the cable enters the derailleur. I would personally use the one with the long pointy bit.

[JXV]

Hi all

 

Just recently picked up a M8000 11s rear shifter, and found two bits in the packet that I'm clueless about.

The left one is hard plastic and the second is rubber, and both have cable holes.

 

I'm worried I'm mucking up the shifter installation by leaving them out, but haven't the faintest where they go, if anywhere.

 

Any ideas? Haven't been able to find any other reference to them online.

 

ImageUploadedByTapatalk1440798514.624649.jpg

 

Thanks in advance!

Those are cable seals. The one with the thin tube you fit in place of the end grommet on cable casings, then slot it into your frame lugs or RD and the rubber bit slips over it after the cable is fitted.

 

On older bikes that had sections of casing with lengths of exposed cable on the frame these were great for keeping dirt and water out the casings. They extended cable life and retained smooth shifting longer. With these fitted you could also inject grease in the casings for smoother shifting and it would be sealed in and not dry out or get gummed up with dirt.

 

Nowadays most bikes are running one continuous length of outer casing from shifter to derailer so you only need one of these seals at the end.

[SurrealTiggi]

Ok using it as a seal to stop dirt makes perfect sense.

 

I even asked at closest lbs and they said it's just alternate plugs for external cable routing, suppose you can use it wherever it fits its purpose.

 

Thanks gents!