Looking for guidance on converting to Di2 triple
I am going to be helping a friend convert his carbon davinci tandem to di2. I have read several of the di2 threads on here and think I have a good direction. The hope is that the di2 will help solve horrible shifting this bike has had since new which would be cheaper than scrapping it altogether. .I have the following parts in my cart and wanted to run it by here to see if we are on the right track. Any help would be appreciated.
Xtr rd-m9050 Xtr rd-m9050 Xtr sc-m9051 Ultegra st-r8050 or st-6870 (bike is caliper brakes but rear is setup to handle disc as well) Ultegra cn-hg701 CS-hg800 11-34 (hub body is 10spd so has to be 11spd mtn) Bt dn1101 Sm-btc1 (haven't determined if we can mount internally) Sm-jc40 Does this look to be the right track? |
You’ll probably need the 13-21-29 chainrings (26-42-58 equivalent) with the conical spacers (they act as shift ramps) from da Vinci to make it work if you don’t have them already. Todd sells his da Vinci tandems with Di2 and has for a few years now, so a quick call or e-mail to him might be advised in order to save some trial and error like which front derailleur mount to use.
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Yes, i have sent todd at daVinci a message already. He responded to the first question which was could the carbon frame be modified to internal di2. Waiting for reaponse on any other tips and tricks
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I’d be having a think about just having a double chainring instead of a triple. We’ve just come back from nearly 2 months in Italy using a double chainring setup on davinci canes instead of a triple and the shifting was just fantastic. We’re using Sram etap but you could do the same with di2
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Originally Posted by ahultin
(Post 20968908)
I am going to be helping a friend convert his carbon davinci tandem to di2. I have read several of the di2 threads on here and think I have a good direction. The hope is that the di2 will help solve horrible shifting this bike has had since new which would be cheaper than scrapping it altogether. .I have the following parts in my cart and wanted to run it by here to see if we are on the right track. Any help would be appreciated.
Xtr rd-m9050 Xtr rd-m9050 Xtr sc-m9051 Ultegra st-r8050 or st-6870 (bike is caliper brakes but rear is setup to handle disc as well) Ultegra cn-hg701 CS-hg800 11-34 (hub body is 10spd so has to be 11spd mtn) Bt dn1101 Sm-btc1 (haven't determined if we can mount internally) Sm-jc40 Does this look to be the right track? I am using it on our tandem 1 X 10 and am EXTREMELY happy with the arrangement. |
Originally Posted by DubT
(Post 20980378)
You could just get 2 of these and save time and money. https://www.sportcrafters.com/produc...x-kit-mini-pod
I am using it on our tandem 1 X 10 and am EXTREMELY happy with the arrangement. |
If you wouldn't mind posting your progress and results I'd appreciate it. I'm looking at getting a used da vinci and doing the upgrade to Di2.
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Originally Posted by ahultin
(Post 20968908)
I have the following parts in my cart and wanted to run it by here to see if we are on the right track. Any help would be appreciated.
Before you modify the frame, test the setup by temporarily mounting the battery externally. If everything works fine, it's not difficult to drill holes at the headtube, rear BB, and R chainstay. I suggest that you talk to Calfee because they modify all brands of carbon frames, and Di2 conversion is one of their services. |
Originally Posted by mtseymour
(Post 20981823)
Do you have a custom length of EW-SD50 cable that is long enough to go from the shifters to the rear bottom bracket? Do your bottom bracket shells have openings to allow the cable to thread through? Make sure that your BB won't interfere with the cable. This is part of the reason why I use the Bushnell Lightweight eccentric without the full shell.
Before you modify the frame, test the setup by temporarily mounting the battery externally. If everything works fine, it's not difficult to drill holes at the headtube, rear BB, and R chainstay. I suggest that you talk to Calfee because they modify all brands of carbon frames, and Di2 conversion is one of their services. |
Originally Posted by ahultin
(Post 20982097)
a calfee built and specced bike with davinci drive and branding.
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Originally Posted by ahultin
(Post 20980700)
While that is an intriguing option, I dont think it would save much money. I am right around 1000 so far and that includes going to hydraulic brakes. The take-offs should have a couple hundred in value making it almost even with the 800 the xshifter would run.
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Originally Posted by DubT
(Post 20982972)
Please tell us how you are doing this upgrade for $1,000.
Xtr rd-m9050 289.99 ebay Xtr fd-m9050 - 69.99 universal cycles clearance from a few months back Sm-fd905 13.12 ebay Xt sc-mt800 84.99 ebay Ultegra st-r785/brs785 245.00 ebay Ultegra cn-hg701 29.99 local CS-hg800 11-34 31.66 ebay Bt dn110 120.11 ebay Sm-btc1 55.00 ebay Sm-jc40 19.00 ebaySm-bcr2 89.87 ebay |
Any update on how it's gone?
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Originally Posted by johnhuebbe
(Post 21066458)
Any update on how it's gone?
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That is correct, this tandem is at calfee getting dropout repaired from shipping damage and disc brake strut added then will be sold again. It has already been replaced by a di2 dragonfly as the ips was never optimal for the varying team makeup and had actually been locked out for some time (bike belongs to a blind stoker)
The xtr di2 has found a home on a 2015 cannondale frame i have had hanging in the garage. https://cimg4.ibsrv.net/gimg/bikefor...f747e7ae3e.jpghttps://cimg5.ibsrv.net/gimg/bikefor...3fd167bd07.jpg |
Hello
The front dérailleur doesnt work with chainrings UP to 38 tooth. Stéphan |
Originally Posted by poluf
(Post 21094443)
Hello
The front dérailleur doesnt work with chainrings UP to 38 tooth. Stéphan |
Originally Posted by ahultin
(Post 21094528)
Though beyond spec, there are many examples on this board of people utilizing this setup with up to a 52t front ring. While I am still waiting for a few items to finish the build, the drivetrain is complete and working well on the stand. I am utilizing 48/36/26 middleburn chain rings.
During my editing, the back of the guide touched the 52t when I kept 1/3 mm between the top of the guide and the 52t. I go to the compact. |
Originally Posted by poluf
(Post 21094541)
OK thank you for the information.
During my editing, the back of the guide touched the 52t when I kept 1/3 mm between the top of the guide and the 52t. I go to the compact. |
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