Does anyone know if Sram Force 1 callipers are currently post mount compatible?
This should be a very easy thing to find out but I have been told by a lot of people in the bike industry that they aren't. All the press releases say Sram's callipers are now Flat mount compatible but don't state clearly if they are now only flat mount specific. The technical information on Sram's website refers to them as post mount in some sections and has a mounting instructions for post mount in the online manual.... but as I say supposedly well informed people keep telling me they definitely aren't post mount compatible.
There absolutely are post mount Force 1 calipers. These groupsets were being spec'd on early disc road bikes before flat mount became the standard (relatively recent). If you call Sram, their very helpful tech service will be able to give you the appropriate part numbers.