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Converting 105 groupet to Di2

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Converting 105 groupet to Di2

Old 04-30-20, 03:46 PM
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InvertedMP 
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Converting 105 groupet to Di2

Not sure where to start. I was going to leave the BB and crank alone and basically do shifters, FD, RD and the necessary cables. Is there a good resource on where to start or how to do this? Does Di2 have a wireless, no cable setup like eTap does? Bike is an Allez Elite.
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Old 04-30-20, 03:54 PM
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Originally Posted by InvertedMP View Post
Not sure where to start. I was going to leave the BB and crank alone and basically do shifters, FD, RD and the necessary cables. Is there a good resource on where to start or how to do this? Does Di2 have a wireless, no cable setup like eTap does? Bike is an Allez Elite.
No idea, but I would start with YouTube or my LBS.
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Old 04-30-20, 04:02 PM
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No wireless at this point - maybe with the next gen of DA, but that'll be a bit of coin if/when.

You can find upgrade kits with a number of vendors online.
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Old 04-30-20, 05:14 PM
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Steve B.
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Originally Posted by InvertedMP View Post
Not sure where to start. I was going to leave the BB and crank alone and basically do shifters, FD, RD and the necessary cables. Is there a good resource on where to start or how to do this? Does Di2 have a wireless, no cable setup like eTap does? Bike is an Allez Elite.
First question I ask is does the bike have internal cable routing currently and is it Di2 ready ? They make kits and a battery to install the cables on the exterior of the frame, I would hate that, but YMMV.

If internal routing, is it Di2 ready ?, the really important part of this is are any frame holes that currently have the F & R shifter cables, sized large enough for the E-Tube cable connector ?. You don't want to be using a Dremel tool on a carbon frame to make the holes larger !.

After that it's all just watching You-Tubes and buying the parts. On the road system upgrade I did, which was a rim brake system, I was able to use the brakes, crank, bottom bracket, chain and cassette. The kit was then shifters, F & R derailers, internal battery and shim for the seat post, A & B Junction boxes, a BT unit and 6 cables of assorted lengths. It's easily about $1000. They have a new part called the Display Unit, mounts on the h-bar (takes up some room) and has the charging port, 3 E-Tube junction ports and a built in BT transceiver. It's cheaper ($90) than an A Junction ($80) and a BT WU111 unit ($70). You can also get a A junction unit that fits inside the end of a handlebar (road bike). That means the bar needs to have holes to route the assorted E-Tube cables.

Oh and you will need to figure out where the battery is going if an internal mount. You can install into the fork, which requires a different compression plug (carbon steerer tube fork) or Star Nut (aluminum steerer) plus a different stem cap for the battery wire. They sell this as a kit I believe. Or do a in-the-seat-post install, which means routing a cable around the bottom bracket from the downtube. If your bottom bracket is a BSA it's easy as you usually remove the b-bracket, run wire around it, and re-install. If a press-fit, a LBS may be involved to remove the b-bracket and re--press (unless you can do this).
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Old 04-30-20, 05:21 PM
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https://di2center.com/hardware-road-...lation-guides/ has some decent consolidated information.

Nothing too tricky about it, just figuring out wire lengths, the type of junction boxes you want to use, and if you want any accessories (like the bluetooth module, which will let you change Di2 settings, update firmware, and talk with cycling computers). Do you know if your Allez is new enough to have provisions for internal wiring?
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Old 04-30-20, 05:44 PM
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I have drilled a CF frame for Di2, no big deal. Get the routing kit it will make life easier.
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Old 04-30-20, 06:52 PM
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Originally Posted by popeye View Post
I have drilled a CF frame for Di2, no big deal. Get the routing kit it will make life easier.
Braver person then I !, I just used a Dremel on an aluminum mt. bike to open up the holes in the frame used by the mechanical system housings. Not for the faint of heart.

And might you have a link to the “routing kit” you speak of ?

Last edited by Steve B.; 04-30-20 at 06:56 PM.
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Old 05-01-20, 03:14 PM
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Originally Posted by Steve B. View Post
snipped. . .And might you have a link to the “routing kit” you speak of ?
Park Tool.

The Specialized Allez Elite is aluminum so I wouldn't be drilling any holes without careful consideration. Maybe eTap is the way to go on this particular frame.
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Old 05-01-20, 07:05 PM
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Have you looked at the prices for Di2 conversion kits before you do anything? The cost of the components will likely exceed the value of your existing bike. From a cost perspective, it make more sense to look for a used Di2 equipped bike (Craigslist, eBay) than attempt to update an old bike. I know this because I've contemplated the same thing about 63 times.
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Old 05-01-20, 07:18 PM
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As jealous as I am that you have the funds to go wireless and as much of a fan I am of the Allez ( I own an elite also) I wouldn't put electronic on it. I would actually trade in my current bike and buy a bike with electronic all ready to go. Not sure you budget but the Allez being not carbon I probably wouldn't go drilling holes in it. it does have internal routing or mine does but I don't know how it correlates with electronic.

Do a build otherwise? Buy just a frame e ready? I love build projects... don't know for sure but I would really rethink doing this I guess, but that is me.
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Old 05-01-20, 07:20 PM
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Originally Posted by blakcloud View Post
Park Tool.

The Specialized Allez Elite is aluminum so I wouldn't be drilling any holes without careful consideration. Maybe eTap is the way to go on this particular frame.
Oh, yeah. THAT routing kit. I guess if you’ve multiple bikes with internal routing and change mechanical cables a lot it would make sense. For a one off Di2, I think I’d pass.

On the bike I installed an XT Di2 system, it wasn’t drilling new holes, it was slightly enlarging existing so was OK with it. I would not be drilling new holes on a frame merely to install Di2.
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