grecinos said:
Hey guys,
I'm going to upgrade my current 10 Speed Ultegra Di2 Componentry to 11 Speed Ultegra Di2. My rationale is that I would like to have an 11/32T rear cassette, I currently have an 11/28T. My question is, what is the difference between a GS and an SS Cage?
Will this derailleur work with 11/32T?
http://www.performancebike.com/bikes/ProductDisplay?langId=-1&storeId=10052&catalogId=10551&productId=1158245&summaryOnly=true&quantity=1
FWIW. Most-if-not-all of Shimano's Road & MTB
mechanical rear derailleurs can actually handle the 32t Cog on most of the frames produced after 1998 ...
EITHER by making an adjustment to the B-screw on the rear OR by swapping the 11t upper jockey wheel with a 10t jockey wheel ...
BUT, as
CAMPYBOB infers, the SS cage rear derailleurs will not be able to handle the amount of chain that you will need IF the chain is long enough to preclude a potential disaster if you were to have the chain on the Large-Large Chainring & rear Cog combination ...
UNLESS you are willing to have a slack lower chain when using the combination which includes the inner Chainring + some of the smaller Cogs ...
With a MTB, you are inviting disaster when the lower portion of the chain is slack ...
With a ROAD bike, a slack lower chain is mostly a cosmetic issue.
I do NOT know what the difference is between the 10-speed & 11-speed mechanisms may-or-may-not be ...
FYI. The cages on most Shimano's 9-speed and 10-speed MECHANICAL rear derailleurs are interchangeable ...
IF the cages on the Di2 rear derailleurs are connected the same way, then you can replace the SS cage on your current rear derailleur with one from almost any other Shimano Road or MTB rear derailleur ...
It's not very difficult UNLESS you have zero-or-limited manual skills.
I do NOT know if any 11-speed Di2 rear derailleur is compatible with 10-speed Di2 shifters, and vice versa ...
If you plan to buy a NEW rear derailleur, then you may want to inquire about the feasibility of using an XTR DI2
/electronic rear derailleur with your Ultegra Di2 shifters to ensure maximum drivetrain configuration flexibility ...
Or, simply consider a "Compact" crankset + GS Di2 Road rear derailleur.
BTW. If you simply want a
32t Cog, then you don't need an
11-speed Cassette/
etc.