Dura Ace 9000 - ETA late 2012/early 2013

Discuss light weight issues concerning road bikes & parts.
mann2
Posts: 75
Joined: Sun Nov 04, 2012 11:36 am

by mann2

bwdftp wrote:
dynaserve wrote:
bwdftp wrote:i'm using 9000 with 7970 and all good. definitely a good upgrade from 7900 brakes.


Are they noticeably better than the 7900 calipers?


yes, there is certainly a noticeable improvement. my experience is pretty consistent with what the reviews are saying.


I second this. Was actually happy with the 7900, but the 9000 is just plain better.

dynaserve
Posts: 272
Joined: Fri Jul 18, 2008 8:25 pm
Location: UK

by dynaserve

Cool

MarkThailand
Posts: 66
Joined: Thu Feb 23, 2012 1:19 pm

by MarkThailand

My bike frame, including Shimano DA DI2 9070 groupset and the internal seatpost battery are at my builder.

My bike builder has procured a Pinerallo internal seatpost battery clamp that is normally used to affix the Shimano DA DI2 internal battery in the aero Pinarello seat post.

The clamp plus battery fits perfectly and snugly with the adjustment screw in my ENVE 34.9 mm seat post.

I do not know how to post pictures on this forum and I do not have a image dropbox account, so sorry for no pics.

Mark

BdaGhisallo
Posts: 1864
Joined: Wed Mar 17, 2004 1:38 pm

by BdaGhisallo

Some useful info posted by Tom Kellogg over on V Salon:

"OK folks. I "spoke" with Wayne yesterday about all of this. Here is the straight poop from the guy who knows his $hit:
- The Shimano 11 speed inter-cog spacing can only be shifted properly in a Di2 system with an 11 speed rear derailleur (currently only the RD-9070). Full stop. The control levers are irrelevant since they are simply dumb switches. The Di2 rear derailleurs determine the inter-cog jump spaces and they can NOT be reprogrammed.
- So, in order to use your old 10 speed rear cassettes, you will need to replace your RD-9070 with a RD-6770 (Ultegra 10sp Di2). That combo will work just fine.
- Conversely, if you want to "upgrade" your 10 speed Ultegra Di2 bike to 11sp, you will simply swap out the rear derailleur to the new RD-9070 and a new 9070 chain. The ST-6770 control levers will shift the 11sp rear derailleur without issue. The only potential issue with this combo is unintended funky shifts when in the big/big combination.

So there you go. Because the electrical engineering of the Di2 system is so simple, (relatively) Mixing and matching is generally not a big deal. All of the connecting wires in current Di2 systems are identical except for length. They can be unplugged from either junction box and plugged into different sockets and it won't make any difference. As mentioned above, the control levers and rear derailleur have no logic circuits that can be reprogrammed. The reprogramming available through the PC interface controls which control lever and which switches do what. Through that interface, you can change which lever shifts which derailleur and which lever shifts up or down. You can also program many aspects of the "multi shift" system which allows you to "dump" gears in a programmable fashion. Only two gears dumped per dump? Sure. Five gears dumped? Sure. Fast dump? Slow dump? No problem. All of that programming is done to the flash memory in the front derailleur ... which acts as the brain of the Di2 system."

dha
Posts: 163
Joined: Tue Jun 12, 2012 4:40 pm

by dha

Do you need the 11ps chainrings (and new crank of course) if you want to upgrade a 6770 system to 11 speed with the RD-9070?

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TrekUk
Shop Owner
Posts: 353
Joined: Mon Jan 14, 2013 5:45 pm
Location: UK

by TrekUk

no 10spd cranks are compatable with 11spd
Madone Five Series 2013
Shimano Dura-Ace 9000
Mavic Cosmic SLE 2013

dha
Posts: 163
Joined: Tue Jun 12, 2012 4:40 pm

by dha

Had "heard" shimano claiming the narrower chain can slip between the two chainrings and they have made them closer to each other on the 11spd versions to prevent this. Might be shimano bull to make us buy the new ones.......

upside
Posts: 601
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

Yup, I have installed the 9000 crankset on 10sp bikes and it works nice.

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Packs
Posts: 89
Joined: Wed Dec 19, 2007 10:28 am
Location: Cheltenham

by Packs

dha wrote:Had "heard" shimano claiming the narrower chain can slip between the two chainrings and they have made them closer to each other on the 11spd versions to prevent this. Might be shimano bull to make us buy the new ones.......


I just lined up my FC7800-C with the FC9000 and the chainrings are equally spaced.
The 7800C and 7900 chainsets do have slightly bigger teeth in places though. Not sure if that would cause any issues?

dha
Posts: 163
Joined: Tue Jun 12, 2012 4:40 pm

by dha

Packs wrote:
dha wrote:Had "heard" shimano claiming the narrower chain can slip between the two chainrings and they have made them closer to each other on the 11spd versions to prevent this. Might be shimano bull to make us buy the new ones.......


I just lined up my FC7800-C with the FC9000 and the chainrings are equally spaced.
The 7800C and 7900 chainsets do have slightly bigger teeth in places though. Not sure if that would cause any issues?


Thanks

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Gearjunkie
Posts: 771
Joined: Tue Feb 19, 2008 5:17 am
Location: NZ

by Gearjunkie

Hi

Sorry if this has been covered already (did a search with no luck, checked listings no luck) but has anyone weighed their Dura-Ace WH-9000 C24 CL's?

Thanks in advance.

GJ

petal666
Posts: 864
Joined: Fri Dec 12, 2008 5:19 am
Location: Brisbane, Oz
Contact:

by petal666

Just got a new set. I shall weigh tonight.

doggatas
Posts: 11
Joined: Sun Jan 08, 2012 7:49 am

by doggatas

Have just replaced mechanical 9000 with Di2 9070. Wow, wow and wow. Electronic shifting is amazing.

petal666
Posts: 864
Joined: Fri Dec 12, 2008 5:19 am
Location: Brisbane, Oz
Contact:

by petal666

WH-9000-C24 CL 597g and 826g including blue rim tape.

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Gearjunkie
Posts: 771
Joined: Tue Feb 19, 2008 5:17 am
Location: NZ

by Gearjunkie

Great, thanks Petal.

:beerchug:

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