New to Di2 - Question
#1
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New to Di2 - Question
I finally joined the 21st century and had a friend upgrade my Roubaix with Ultegra Di2 11 speed. I kept the 6700 crankset and brakes.
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix? Suck it up, buttercup???
Pic
PS. Note this is 11s Di2. I believe the 12s works differently. Thanks for any/all suggestions.
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix? Suck it up, buttercup???
Pic
PS. Note this is 11s Di2. I believe the 12s works differently. Thanks for any/all suggestions.
Last edited by datlas; 01-04-24 at 10:40 AM.
#2
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Really, I don't think you'll miss it that much. I ride both mech and di2, and it's so darned easy to be shifting front and back simultaneously, that I'm usually dancing in the mid-cog more than ever, except significant hills.
#4
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Not sure there is any “as needed” to use those two gear combinations to be honest. You’re probably already into the equivalent of the 4th/5th cog on the back with the large chainring at that point.
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why would you even want that gear combo? personally, once i'm half way through the back end i'm up on the big ring. little-little is something i never do.
#7
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Aaaaaaaaaaaaaahhhhhhhhhhhhhhhhhh... make it stop !!!
... OK, do what you want... but I do not comprehend this insanity.
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#8
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I don't use these often but sometimes I want to be able to.
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Is there a reason not to be in the big ring (and presumably a biggish cog) at a stop sign? Doesn’t Di2 actually make this really easy to do quickly?
#10
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Yeah. Try starting from a full stop in the big ring. Not easily done, at least for me.
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If it's fixable with a computer setup, I'd find a computer setup you/your buddy can fix it on. I do agree with your reasoning on why it needs to be fixed. One of my pet peeves is those at the front of the group that doddle and slowly get across an/the intersection. The people at the back of the group get hung out to dry as the traffic starts up again.
Last edited by seypat; 01-04-24 at 11:59 AM.
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I finally joined the 21st century and had a friend upgrade my Roubaix with Ultegra Di2 11 speed. I kept the 6700 crankset and brakes.
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix?
???
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix?
Suck it up, buttercup
In fact I found that I like to run the Di2 in full synchronized mode so I never even have to think about it. And for the most part, the shift levers on my left STI haven't been used but for a few very rare instances since going exclusively to full synchro.
So this part of your post is very appropriate....
Suck it up, buttercup
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I finally joined the 21st century and had a friend upgrade my Roubaix with Ultegra Di2 11 speed. I kept the 6700 crankset and brakes.
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix? Suck it up, buttercup???
Pic
PS. Note this is 11s Di2. I believe the 12s works differently. Thanks for any/all suggestions.
He tells me the setup has 1st generation 11s shifters and 2nd generation 11s RD/FD.
The system shifts great and although I have only used it a few times, I am overall pleased with it.
I so far have only one concern: the setup will NOT let me use the two smallest cogs in back when on the small ring in back. I can use all cogs in back when on the big chainring.
I mentioned this to my friend who set this up, he said this is the default of the system to prevent cross-chaining, and to over-ride this you need a computer setup which he does NOT have.
I suppose I can get used to not having my 11t and 12t when in the small ring, but it kinda rubs me the wrong way that I can't use these gears occasionally on an-as needed basis.
The whole electric shifting thing is still mostly a black box to me, but I expect there is some good knowlege here. Suggestions?? Easy Fix? Suck it up, buttercup???
Pic
PS. Note this is 11s Di2. I believe the 12s works differently. Thanks for any/all suggestions.
If you really want to do it and you don't mind you chain rubbing on the FD cage, you can probably circumvent this by connecting your bike to the E-TUBE app via the computer or your phone if you have the bluetooth adaptor (11sp DI2 requires a separate adapter to be bought while 12sp DI2 are bluetooth enabled) and enabling it.
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If it's fixable with a computer setup, I'd find a computer setup you/your buddy can fix it on. I do agree with your reasoning on why it needs to be fixed. One of my pet peeves is those at the front of the group that doddle and slowly get across an/the intersection. The people at the back of the group get hung out to dry as the traffic starts up again.
Besides, you can always change gear while stopped by pulling the front brake and pushing on the bars to lift the rear wheel as you rotate the crank.
#17
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It's called dumb-proofing and you shouldn't cross-chain as there is no good reason to. The system shouldn't let you use the 2 hardest gears in the back when you're on the small ring and shouldn't let you use the 2 easiest gears in the back when you're on the big ring.
If you really want to do it and you don't mind you chain rubbing on the FD cage, you can probably circumvent this by connecting your bike to the E-TUBE app via the computer or your phone if you have the bluetooth adaptor (11sp DI2 requires a separate adapter to be bought while 12sp DI2 are bluetooth enabled) and enabling it.
If you really want to do it and you don't mind you chain rubbing on the FD cage, you can probably circumvent this by connecting your bike to the E-TUBE app via the computer or your phone if you have the bluetooth adaptor (11sp DI2 requires a separate adapter to be bought while 12sp DI2 are bluetooth enabled) and enabling it.
I will ask a computer savvy bike friend if they are able to help me with this.
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I agree that cross-chaining is "poor form" and can cause some extra wear on the drivetrain. That said, there are occasonally times when I want to be able to use the smaller cogs on back when in the small ring (see above) and if I want to use that combination for 30 seconds periodically, I don't see that as such a bad thing.
I will ask a computer savvy bike friend if they are able to help me with this.
I will ask a computer savvy bike friend if they are able to help me with this.
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The older Di2 6850 allowed this small chainring -- smallest cog cross chain.
Last year, I upgraded the rear derailleur to the newer 8050. I don't think there's a way to override the small ring, two smallest cog lockout. I thought this was going to be quite annoying, but I don't really notice any downside to this lockout. I used to do the small-small cross chains occasionally, but the chain "ticked" on the big chainring's shifting pickup pins. Ha, that did tell me when I was cross chained!
I have the older charging cable & control box, but that model isn't compatible with the new 8050. So I had the local bike shop do the firmware update. I've used e-tube with the old 6850, and it's easy.
Last year, I upgraded the rear derailleur to the newer 8050. I don't think there's a way to override the small ring, two smallest cog lockout. I thought this was going to be quite annoying, but I don't really notice any downside to this lockout. I used to do the small-small cross chains occasionally, but the chain "ticked" on the big chainring's shifting pickup pins. Ha, that did tell me when I was cross chained!
I have the older charging cable & control box, but that model isn't compatible with the new 8050. So I had the local bike shop do the firmware update. I've used e-tube with the old 6850, and it's easy.
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yo must have the Di2 set up as manual as can be. i do too. if it were one of the other ways then i think it would shift to the big ring for you. i did not like that config so when full manual.
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I agree that cross-chaining is "poor form" and can cause some extra wear on the drivetrain. That said, there are occasonally times when I want to be able to use the smaller cogs on back when in the small ring (see above) and if I want to use that combination for 30 seconds periodically, I don't see that as such a bad thing.
I will ask a computer savvy bike friend if they are able to help me with this.
I will ask a computer savvy bike friend if they are able to help me with this.
On my version of Di2 the cassette size in the e-Tube setup can be changed to a 11-26 or maybe n-27 and it will shift to those two smaller cogs. Physically the size of the cassette doesn't matter to the Di2 RD or E-tube it'll just have the gear ratios presented to you wrong when you look at the set up for them or on a Garmin or other device capable of communication with your Di2, it'll show the wrong ratios or tooth counts if you choose to display that information.
Last edited by Iride01; 01-04-24 at 02:36 PM.
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#24
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Proper chain management for cassette cogs of various tooth counts is why rear derailleur cages come in different lengths.
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^ This doesn't make sense to me. When you size a chain for a mechanical groupset in which the rider can shift into "small-small" the RD deals with that just fine. It's a very bad gear combination for sure, but it shouldn't create excess slack in the chain.
Proper chain management for cassette cogs of various tooth counts is why rear derailleur cages come in different lengths.
Proper chain management for cassette cogs of various tooth counts is why rear derailleur cages come in different lengths.
Last edited by choddo; 01-04-24 at 05:57 PM.