Ultegra Di2 - How do you set up a triple?
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Ultegra Di2 - How do you set up a triple?
Hay people, I'm usually on C&V but I have bikes from 73' to 2010'. This pertains to the new stuff, DII2 Ultegra. My local bike shop told me that you can't use a triple with Dii2. My bike shop really doesn't do more then setups and follow manufacture's guide lines. They once told me to throw away my DA 7700 pedals when I wanted to rebuild them. So I rebuilt my pedals, screw them. So is there a "Hack" for a triple, I know there is a way for sequential up/ down gearing with just one paddle ( The computer knows that the next highest gear is up on the front and down on the rear). I know there is a simple two button pad that you can mount on the bar and not use the paddles. I'm just lacking in the info on a triple. Thanks, I don't want to get in any ones way, I'm just slow.
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A) it's just di2. No ii. We're not on the second version yet, and that would be DiII.
B) You can do anything with enough creativity, but as far as I am aware, you can't use a triple or do sequential shifting with it. (yet)
Welcome to the 41!
Also, find a new LBS.
B) You can do anything with enough creativity, but as far as I am aware, you can't use a triple or do sequential shifting with it. (yet)
Welcome to the 41!
Also, find a new LBS.
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I'm sure that there are more than a few people who'd be interested in hacking Di2 to work with a triple, but there are several problems.
1) you'd need to take apart the front derailleur and replace the cage with one for a triple FD. I suppose you could buy a sacrificial 6703 FD, take the cage and toss the rest.
2) you'd need some special equipment to reprogram the system. It retails for $200 in the U.S.
3) (the real problem) you need special hacked firmware that supports a triple. To my knowledge, it does not exist because no one figured out how to do it. It is not easy to hack firmware for some obscure electronic device without any source code or documentation.
1) you'd need to take apart the front derailleur and replace the cage with one for a triple FD. I suppose you could buy a sacrificial 6703 FD, take the cage and toss the rest.
2) you'd need some special equipment to reprogram the system. It retails for $200 in the U.S.
3) (the real problem) you need special hacked firmware that supports a triple. To my knowledge, it does not exist because no one figured out how to do it. It is not easy to hack firmware for some obscure electronic device without any source code or documentation.
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Would a mountain double get you where you want to go?
You can have 26..38 up front. Or 40..28.
When combined with an 11..28 that should give you decent gearing.
Just thinking out loud.
You can have 26..38 up front. Or 40..28.
When combined with an 11..28 that should give you decent gearing.
Just thinking out loud.
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Is it possible to Di2 the back end and cable the front end, or does that make way too much sense? Electronic shifting makes so little sense in my Fredly world as it is.
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Throw the stick!!!!
Pretty sure the brains of the operation are in the front derailleur.
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The real advantage to DI2 is the perfect front derailleur. Getting a triple working reliably is hard, more black art than skill. If a DI2 triple was easy Shimano probably would have done it. It would bring me back to a triple if Shimano could get it right.
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My thought was that if the FD self adjusts then if it was set up for a triple you would not need to change the cage. The RD might need a longer cage to take up chain wrap, but that would be an easy fix. I'm going to send a letter to Shimano. DinoShepard +1 I did not know you could get a double down to 26-38. David Broon Yes you can with sequential shifting, It is for sale and you add a button to your handle bar...$150. Where is the brain, I thought it was in the brake levers. Different parts have different parts of the brain??? Just seems like a no brainer for Shimano to get it to work for a triple.
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How to set up Di2 triple - step by step:
1. Open computer and go to craigslist.
2. Post "triple crank for sale"
3. Use money from sale to buy a double crank.
Sure...not helpful but I sure feel better.
1. Open computer and go to craigslist.
2. Post "triple crank for sale"
3. Use money from sale to buy a double crank.
Sure...not helpful but I sure feel better.
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Electronic rear / cable front is crazy. Mostly defeats the idea of having electronic shifting in the first place. Most of the value of electronic is in smooth reliable front shifting and front auto-trim. Besides, it simply wouldn't work, the system won't function if it does not see all components.
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Thanks Hamster Good to know that my thinking is correct. Now more complaining to Shimano. It just looks like a programming job, and they did it the first time so why no for triple. Thank you all for the info, better here then the Shimano website.
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On the tandem forum, we'd love to have an electronic shifting triple. Thus this post, which I copy/paste.
[HR][/HR]
The thing is, we will all grow old before Shimano or Campagnolo makes a triple shifting FD. If you talk to anyone in the bicycle industry about tandems and triples, they recoil from you as does Dracula from a cross.
I think it is doable, however, to modify existing systems to shift a triple. One thing to note is that the 11-speed chains are narrower, and thus the chainrings can be more closely spaced. This requires less range of throw of the FD. There might, even now, be sufficient throw now on Di2 or EPS to shift an 11-speed FD on a more closely spaced triple.
How it could be done for Campagnolo (and presumably Di2 as well) is depicted on this graphic. (1)The new Athena 3X FD donates its cage. (2) If the throw on the EPS FD isn't sufficiently wide, then a longer arm (as depicted) is fabricated using 3-D printing (see video below) to obtain wider throw. (3) The EPS brains are hacked to get it to make 3x shifts. All of these things have been done individually. K-Edge has done more than this to produce a mountain Di2 group.
3-D Printing bicycle parts:
[HR][/HR]
I think it is doable, however, to modify existing systems to shift a triple. One thing to note is that the 11-speed chains are narrower, and thus the chainrings can be more closely spaced. This requires less range of throw of the FD. There might, even now, be sufficient throw now on Di2 or EPS to shift an 11-speed FD on a more closely spaced triple.
How it could be done for Campagnolo (and presumably Di2 as well) is depicted on this graphic. (1)The new Athena 3X FD donates its cage. (2) If the throw on the EPS FD isn't sufficiently wide, then a longer arm (as depicted) is fabricated using 3-D printing (see video below) to obtain wider throw. (3) The EPS brains are hacked to get it to make 3x shifts. All of these things have been done individually. K-Edge has done more than this to produce a mountain Di2 group.
3-D Printing bicycle parts:
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. K-Edge has done more than this to produce a mountain Di2 group.
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Pfft.
They could easily do it. They don't want to.
If a DI2 triple was easy Shimano probably would have done it. It would bring me back to a triple if Shimano could get it right.
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Yeah, but what about the shifter? Not stock that is.
The shifter in your pic is functionally the same. It only has one pair of switches because the bike has 1x10 drivetrain so there's no front shifting to be done. This does not involve any firmware hacking.
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Not sure what the tooth differential Di2 is rated for, but the Sugino OX801D and OX601 are 94/110 so you can have a small ring down to 30t on a double with a reasonable q factor, outboard bearing bb, and no chainline wonkiness. If you just want low gearing in the triple neighborhood with a double and a short cage rd that's how I'd do it.
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Personally, I'd love a stock electronic RD that can do a wide range cassette. On my Roubaix right now I've got an 11-34 with an XTR RD. If there was a way to do the same thing with a stock electronic RD (not the K-Edge hacked RD) I'd do it in a heartbeat.
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Sorry for the necro-post, but this might be possible now.
Unless I am reading this wrong, it looks like Lennard Zinn says that if you purchase XTR (mountain bike) front and rear derailleurs, you can use these with Di2 road shifters.
Tech FAQ: Mixing Shimano road, MTB Di2 derailleurs - VeloNews.com
Unless I am reading this wrong, it looks like Lennard Zinn says that if you purchase XTR (mountain bike) front and rear derailleurs, you can use these with Di2 road shifters.
You can run a full XTR Di2 drivetrain with your Di2 road levers (you could use any Di2 ST or SW Di2 switch, like climbing, sprint, or TT switches with it). That would be analogous to mixing 10-speed ST-6770 (Ultegra Di2 shifters) with 11-speed RD/FD, or 11-speed ST-6870 (Ultegra Di2) or ST-9070 (Dura-Ace Di2) with 10-speed FD/RD-6770 (original Ultegra Di2). Both of these road combinations do work.
Tech FAQ: Mixing Shimano road, MTB Di2 derailleurs - VeloNews.com
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Sorry for the necro-post, but this might be possible now.
Unless I am reading this wrong, it looks like Lennard Zinn says that if you purchase XTR (mountain bike) front and rear derailleurs, you can use these with Di2 road shifters.
Tech FAQ: Mixing Shimano road, MTB Di2 derailleurs - VeloNews.com
Unless I am reading this wrong, it looks like Lennard Zinn says that if you purchase XTR (mountain bike) front and rear derailleurs, you can use these with Di2 road shifters.
Tech FAQ: Mixing Shimano road, MTB Di2 derailleurs - VeloNews.com