Originally Posted by
WheelsNT
Try it with your existing derailer first, you can always buy the 10sp derailer later if you're not happy with the performance. Sheldon Brown has a nice article on derailer adjustment, he mentions using a longer b-screw or reversing the screw for Shimano 36T cogs:
"A larger low-gear sprocket may require a different rear derailer, for enough angle adjustment to clear the sprocket. In extreme cases, such as with a Shimano 36-tooth sprocket, a longer angle-adjustment screw may be needed -- some people even install the screw backwards."
http://sheldonbrown.com/derailer-adj....html#btension
Following Wayne's and WheelsNT's advice I am ordering the 10 speed Durace chain, the XT 11-36 cassette and the Ultegra triple 10 sp shifters. I still want to find a source for the chainrings 28-39-52 that will fit my Ultegra 9 speed cranks. They need to be replaced regardless of how well the shifting works because they are pretty worn now. Thanks