I’ll let you know once I get more info on the new 12 speed stuff, existing 105 Di2 run 36t max capacity, which mean a theoretical 46t cassette with 12 speed 46/30.
They do seem to finally have realised that we're not all World Tour freaks pushing 100" gears up mountains at 30kph. Who knew? 46/30 will be the new 'Compact' crank for sure.
I’ll let you know once I get more info on the new 12 speed stuff, existing 105 Di2 run 36t max capacity, which mean a theoretical 46t cassette with 12 speed 46/30.