Assuming the geometry is the same (which it is) as mechanical, then the answer would be in the range 30-31T max total takeup, IF
you want to be able to cross-chain both ways.
So, 52 - 36 = 16T. leaving 14T max for the cassette. So a 12-27 is stretching things at 15T. Chain length is critical in this whole discussion.
Alternatively, if you promise not to cross chain into the small-small combos, then you can go wider range. Just size the chain on the big-big for safety, and remember that the RD will run out of capacity as you approach the small-smallest sprocket. So, if using the 52-36 and 12-29, the chain, if correctly sized, will start to sag around the 36-14 point. So, still quite safe and useable.
Also if using a 29T sprocket on mechanical, it's worth checking and backing out the "H" screw for max clearance. Don't know how EPS RD handles this, but there's always the instructions.
Regardless, it is compatible with a 12-29 cluster.
Just checked the tech specs. EPS and mechanical RD's have the same takeup capacity, since their sprocket spacing is the same at 55mm. The same as the previous generation also.
ps. loved that the EPS battery has a case of
. Good to know in case your bike is trapped inside a burning building.
There's sometimes a buggy.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.http://www.youtube.com/watch?v=GekiIMh4ZkM