Most of the info I could find in forums was about going from Triple to Double. Not sure why you would want to do that, but anyway I want to know if I can replace my double compact crank (DA 7900) with a triple (probably Ultegra). I have DA 7800 shifters and I don't care about getting to the big ring so I'm thinking I could use my current shifters (just limit the FD to reach the middle at it's farthest). Would this work without changing anything but the crankset? This would be a temporary thing - to get through some upcoming mountain races, then I would put my double back on.

Thanks.