Oops, were we supposed to see that?

[Bruce K]

For those watching carefully, I think we just got a first look at a Dura Ace Di2 Shadow plus rear derailleur.

Scott bike - close-up shot. Couldn't see a cable anywhere.

BK

[Spaghetti Legs]

Are you referring to yesterday's Tour stage? I saw a funky looking RD on a quick pan shot of one of the breakaway riders. I wondered what it was - it had huge pulleys, but I'm not really up to speed on all the electronic stuff.

[Bruce K]

Nope - today’s Stage on the Scott bike.

BK

[cribbit]

Photos/clip?

[metalheart]

What is the difference between a "Shadow" and other Shimano derailleur?

[Bruce K]

Wireless?

BK

[stev0]

My understanding was that shadow derailleurs were more tucked/low profile than your average RD, and that "shadow plus" means low profile + clutch.

https://i.stack.imgur.com/Hfpta.jpg

So Di2 Shadow Plus = wireless, low profile, clutch RD

[weiwentg]

...

So Di2 Shadow Plus = wireless, low profile, clutch RD

So, basically the OP believes he saw a Dura Ace RX Di2 derailer. We already know the Ultegra RX Di2 derailer exists, but he suspects a DA version is coming.

[stev0]

precisely. wasn't watching closely, but would have expected it to surface on the cobbles if anywhere.

[Mark McM]

My understanding was that shadow derailleurs were more tucked/low profile than your average RD, and that "shadow plus" means low profile + clutch.

https://i.stack.imgur.com/Hfpta.jpg

So Di2 Shadow Plus = wireless, low profile, clutch RD

I don't see the advantage of a low profile derailleur on a road bike. On an MTB, sure, it's less likely to get snagged by something on the trail, but on a road bike?

On the other hand, I do see a few other features of these derailleurs that are independent of the low profile design: Specifically, they have their B pivot offset to the rear, and they have a clutch mechanism, both of which improve performance with wide range cassettes.

[Bruce K]

It was clearly labeled Dura Ace and had no visible wires or cables.

Mechanic sitting next to me said shadow.

BK

[.RJ]

Wireless?

[Bruce K]

Appeared to be...

BK

[madsciencenow]

[QUOTE=Mark McM;2397209]I don't see the advantage of a low profile derailleur on a road bike. On an MTB, sure, it's less likely to get snagged by something on the trail, but on a road bike?

It will save you 0.0001 watts ... ...which is a 30% improvement over non-shadow rear derailleurs;)

[oldpotatoe]

Wireless?

Wonder if anybody spotted any Campag 12 wireless? There won’t be a 12s EPS(wired)...:eek:

[bikinchris]

I would post a photo of that derailleur, but this site doesn't host images.

[David Tollefson]

It was clearly labeled Dura Ace and had no visible wires or cables.

Mechanic sitting next to me said shadow.

BK

Shimano wireless would make me happy.

[GregL]

This thread is nearly worthless without pictures!

Greg

[m_sasso]

I would post a photo of that derailleur, but this site doesn't host images.

Yes, it does, just need to know how to use the site.

Click on "User CP" in the header/user bar then click on "Pictures & Albums" then click on "Upload Pictures" then click on Choose File" then click on "Save File" find the image, click on the image and copy the "BB Code".

Paste to a new message and post!

[Willy]

Yes, it does, just need to know how to use the site.

Click on "User CP" in the header/user bar then click on "Pictures & Albums" then click on "Upload Pictures" then click on Choose File" then click on "Save File" find the image, click on the image and copy the "BB Code".

Paste to a new message and post!

Or you could just do a screen shot

[bikinchris]

That is just stupid to have to jump through three hoops to upload an image. Here is a small image.

https://forums.thepaceline.net/picture.php?albumid=91&pictureid=376

[savechief]

It was clearly labeled Dura Ace and had no visible wires or cables.

Mechanic sitting next to me said shadow.

BKThe mechanic sitting next to you doesn't know his terminology. Both of the current Dura-Ace 9100 rear derailleurs (mechanical and di2) are "shadow" derailleurs.

Sent from my SM-G930V using Tapatalk

[Bruce K]

That looks like the ****

BK

[bikinchris]

I don't think it's wireless. There is no battery.

[glepore]

Don't think its a clutch, the Ultegra version has a switch to engage/disengage the clutch that isn't in the shot. I looked at it carefully on the replay coverage, couldn't see a wire...doesn't mean its not there. The upper link does look different than the current 9170.

[stien]

Might not need a battery if shimano follows through on their patents to make power via the pulleys 😄

[Jaybee]

maybe there is a wire that arcs down from just underneath the junction of the chainstay/seatstay and follows the curve of the hanger? Maybe I'm just imagining it?

[ptourkin]

The mechanic sitting next to you doesn't know his terminology. Both of the current Dura-Ace 9100 rear derailleurs (mechanical and di2) are "shadow" derailleurs.

Sent from my SM-G930V using Tapatalk

Yes.

Idk, just looks like 91xx with a modified hangar, if that.

https://bike.shimano.com/en-EU/technologies/component/details/shimano-shadow-rd.html

https://bike.shimano.com/content/dam/global/cg1SHICCycling/final/products/cg2SHICComponent/cg3SHICRearDerailleur/cg4SHICRearDerailleur/P-RD-R9150_14140_1.jpg

[GregL]

Looks like a standard Scott installation of a Di2 9150 rear derailleur:

[GregL]

More confirmation from Cyclingnews (http://www.cyclingnews.com/features/tour-de-france-bikes-adam-yates-scott-addict-rc-gallery/):

[Bruce K]

Coukdn’t See a cable in the TV shot.

Maybe it’s the focus/vibration.

BK

[dddd]

I don't see the advantage of a low profile derailleur on a road bike. On an MTB, sure, it's less likely to get snagged by something on the trail, but on a road bike?

On the other hand, I do see a few other features of these derailleurs that are independent of the low profile design: Specifically, they have their B pivot offset to the rear, and they have a clutch mechanism, both of which improve performance with wide range cassettes.

From the picture, it appears that the QR nut protrudes well past the entire Shadow derailer, so a crashed road bike would seem to be more resistant to suffering a bent hanger.

[Mark McM]

From the picture, it appears that the QR nut protrudes well past the entire Shadow derailer, so a crashed road bike would seem to be more resistant to suffering a bent hanger.

I suppose it helps a bit, but since the entire derailleur is still hanging below (outside the rear triangle), it is still very possible to bend the hanger, for example when the rear wheel is removed for transport (or even if the bike just falls over, if it lands right).

[dton]

There's definitely a wire, first angle didn't show it.

http://i.imgur.com/G3FlYEV.png (https://imgur.com/G3FlYEV)

[David Tollefson]

There's definitely a wire, first angle didn't show it.


What a let-down.