Is there 10spd Ultegra Di2 that's not in the old format?
I have no idea what shimano did (maybe pulled the stock) but 6770 is almost non existant. You could find something on forums ebay etc. But 6870 is cheap enough to justify buying new. Its e-tube so it should work. But 6770 rear mech is ugly and heavy.
Front mech sounds like ball ache. Yeah stay with mechanical I'd say for more agile approach. Or 1x11 ;)
I have no idea what shimano did (maybe pulled the stock) but 6770 is almost non existant. You could find something on forums ebay etc. But 6870 is cheap enough to justify buying new. Its e-tube so it should work. But 6770 rear mech is ugly and heavy.
Front mech sounds like ball ache. Yeah stay with mechanical I'd say for more agile approach. Or 1x11 ;)