I need lower gearing on my 2007 Cannondale Synapse Road Bike. At the moment it has a Shimano Ultegra 6600 Compact Groupset 50/34 with a 10 speed 12-27 cassette. Could I replace the cassette with a 10 speed XT MTB cassette (CS-M771) to give me 11-34, change the rear derailleur to an Ultegra RD-6700 GS triple and replace the chain with a new Ultegra CN-6701 10 speed chain?
I would be keeping the Ultegra shifters so the shifting system would still be Ultegra the only none road part would be the XT cassette. Shimano say the RD-6700 GS has a capacity of up to 33T so I reckon it would probably be ok with 34.
Any ideas, help, etc would be welcome.