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PostPosted: Sat Jun 22, 2013 3:46 am 
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Think we'll see a Dura-ace version once the UCI approve their use in races.

Likely in 1~2 years. Or if the market demand is high enough, they would put it together with their 'mainstream' groupsets. Just like their compact cranksets.


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PostPosted: Sat Jun 22, 2013 8:13 pm 
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oooh this looks nice!

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PostPosted: Sun Jun 23, 2013 1:30 am 
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Ultegra Di2 looks amazing.


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PostPosted: Mon Jun 24, 2013 9:59 am 
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Found this from a blog of the Shimano product presentation in Malaysia.

Image


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PostPosted: Sun Jun 30, 2013 6:38 pm 
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Now official.

http://road.cc/content/news/86557-ultegra-6870-di2-and-road-discs-unveiled


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PostPosted: Sun Jun 30, 2013 9:30 pm 
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"Di2 is the opposite of mechanical groupsets in the sense that it's the derailleur, not the shifter, that's speed-specific. So you'd be able to use the new levers with old 10-speed mechs but you couldn't swap your old Di2 rear derailleur our for the new one."

Bad news if it's true.

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PostPosted: Sun Jun 30, 2013 9:39 pm 
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It seems this is a wrong statement when you read the bikerumor article. Everything is compatible.

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PostPosted: Mon Jul 01, 2013 2:54 am 
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Given that the RT-99 discs are centre lock only, what are the recommendations for lightest affordable hubs that will suit the centre lock system ?


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PostPosted: Mon Jul 01, 2013 4:05 am 
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DT Swiss 180's are the lightest center lock hubs that I have found but they are pricey, otherwise 240's.


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PostPosted: Mon Jul 01, 2013 8:32 am 
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I don't see any hydraulic rim brakes :(

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PostPosted: Mon Jul 01, 2013 3:13 pm 
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Anders wrote:
"Di2 is the opposite of mechanical groupsets in the sense that it's the derailleur, not the shifter, that's speed-specific. So you'd be able to use the new levers with old 10-speed mechs but you couldn't swap your old Di2 rear derailleur our for the new one."

Bad news if it's true.


Not convinced that is accurate, I think I have seen 10spd Ultegra shifters working with 11spd Dura Ace front and rear mechs. The shifters are just switches and the connections must be the same. The Ultegra 6770 shifters DO work with the new junction A and internal battery, that I do know.


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PostPosted: Mon Jul 01, 2013 3:48 pm 
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MichaelB wrote:
Given that the RT-99 discs are centre lock only, what are the recommendations for lightest affordable hubs that will suit the centre lock system ?
I believe that is specific to the new 140mm Icetech rotors seeing as there are currently 6-bolt IceTech 160mm rotors available.

dha wrote:
Not convinced that is accurate, I think I have seen 10spd Ultegra shifters working with 11speed DuraAce front and rear mechs. The shifters are just switches and the connections must be the same. The Ultegra 6770 shifters DO work with the new junction A and internal battery, that I do know.
While I have no experience, Shimano has been very forthright in promoting the fact that assuming components have been updated to the latest firmware, any e-tube Di2 component is interchangeable with any other within the limitations of the component. What that means is that if you have a 10-speed Di2 e-tube compatible group and want to go 11-speed, even though the 11-speed shifters will work with a 10-speed e-tube rear derailleur, there is not a firmware update to make the rear deraileur shift 11-speeds so this will also require an 11-speed rear derailleur and cassette.

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PostPosted: Mon Jul 01, 2013 8:54 pm 
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kevinkalis wrote:
I don't see any hydraulic rim brakes :(

As soon as the UCI approves disc brakes all bikes will have those, so i understand Shimano not wasting time in something that will disappear anyhow.


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PostPosted: Mon Jul 01, 2013 9:14 pm 
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MisterNoChain wrote:
As soon as the UCI approves disc brakes all bikes will have those, so i understand Shimano not wasting time in something that will disappear anyhow.
I would tend to agree but some might argue there is a place for them seeing how SRAM Red 22 hydraulic shifters and rim brakes apparently helped keep Cavendish upright the other day near the end of the chaotic first stage at the tour!

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PostPosted: Mon Jul 01, 2013 10:27 pm 
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His comment smell more like a plug for the sponsors too me. On dry roads, flat roads breaking seems more about what the tires can handle than any claimed hydro rim break advantage.


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