Forums » Quarq Discussion » Shimano Di2 Compatibility (12 posts)

Shimano Di2 Compatibility
jderose
9 months, 2 weeks ago

Hello. I'm looking to build a bike up with Shimano's "Di2" Dura-Ace / Electric drivetrain and either a Standard or Compact CinQo Saturn SRAM S900 crankset. Any known issues there? The rest of the drivetrain is Dura-Ace 7900. Thanks, JD
Jim@Quarq
9 months, 2 weeks ago

Di2 works just fine with all the CinQo models. The DA-7900 rings fit all the standard 130bcd CinQo's. Also the Di2 works nicely with other 10sp chainrings (more so than mechanical DA-7900) so you are free to take your pick of CinQo models to use.

Jim
jderose
9 months, 2 weeks ago

Thanks Jim. If I understand you correctly, I can use DA-7900 chainrings on the SRAM Compact/Standard CinQo (or just stick with the SRAMs)?
Jim@Quarq
9 months, 2 weeks ago

The DA-7900 rings don't fit on the compact CinQo, but they do fit the standard. You can run SRAM rings on either along with the Di2.
jderose
9 months, 1 week ago

Cool. Thanks, Jim.
ZioTony
9 months, 1 week ago

Ciao Jim, I hope you don't mind me tagging a follow up question to this thread. On the subject of DA-7900 compatibility, which of your compact crank options would you recommend as functioning best with the "mechanical" 7900 setup? Conversely, any that you would avoid pairing with the 7900? Thanks!
Mieke@Quarq
9 months, 1 week ago

Both our current compact cranks, SRAM S900 and FSA Team Issue, will work fine with the mechanical DA-7900 setup.

We hope to have the Rotor 3D compact CinQos available mid to late January as well. They should work with the DA-7900 with either the Rotor OCP-3 ring setup or regular round rings.
ZioTony
9 months, 1 week ago

Thanks Mieke, and for your great responses be e-mail. I look forward to riding a CinQo soon!
tonski
9 months ago

I threw my 7800 rings on my FSA CinQo because of shifting problems with FSA rings I can't seem to shake. It felt much "stiffer" after the change but that is just a feeling, no science to back it up.

I was having problems with the chain falling between the rings. Calipers show the FSA rings to be a lot thicker than the DA causing them to be spaced (between big and small ring) more.
goneskiian
7 months, 2 weeks ago

So you changed the rings yourself? I thought that was a no, no as it would throw off the Cinqo calibration. Is it just a matter of matching the torque of all the chainring bolts? If so, that shouldn't be too difficult.

Thanks!
mordor
7 months, 2 weeks ago

Just going to throw in my experience with chainrings & cranksets:

Non-shimano chainrings do not shift as well as shimano chainrings. As tonski said you can measure this yourself: compare a 10-speed shimano crankset to a sram/fsa/truvativ/whatever crankset as you will see the other cranksets are all off. This is because, I believe, 1) Shimano has a patent on the 10-speed chainring spacing forcing others to use false chainring spacing and 2) the other companies try and make the cranksets "9/10" speed compatible so it will work with 9-speed cranksets better as well. So in summary regardless of what crankset you get I would recommend shimano rings; shimano does make standalone ultegra level chainrings for compact cranks (6650 series) for example.)

Secondly on the compact cranksets: I have used the FSA crankset and the SRAM. The FSA doesn't work as well in my opinion; it has some loctite you are supposed to use to assemble it and it does not hold up 100%. The Sram on the other hand uses their regular tapered GXP spindle and I have never seen that come loose or anything so I would go with the SRAM compact crankset. The stock sram chainrings will work okay but if you want the best look into shimano.
klosiewski
6 months, 3 weeks ago

Can you use the dura ace 7950 chainrings with the cinqo saturn S900 compact crankset?

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