I'm currently riding a 2014 Trek 1.2 with SRAM PG-950 rear cassette, Shimano Sora shifter and Sora rear derailleur. I'm trying to work out some incremental improvements/tweaks to my ride and want to upgrade to 11-speed. Looking at probably the Shimano 105 ST-5800, but want to make sure it fits my hub. I know I need the derailleur and shifter as well, just want to make sure the cassette will fit before I take the step