Originally Posted by
Scrodzilla
It sounds like you should do a LOT more research before spending one more dollar.
This.
Originally Posted by rms13
the suggested workflow is to do research and ask questions here before you buy something not the other way around
And this.
A) Those are not the right cranks for your build. If you're in flatlandia (aka the valleys of CA), running anything less than a 42T crank is silly as you'd need < 15T cog to get faster than 12mph at 100rpm
2) 175mm cranks are a horrible idea for a FG bike. You need to be able to take a turn without pedal strike
C) Front brake or not is your choice but I recommend starting with a front brake
Do more research, then come back with more specific questions. Don't spend money on the wrong (or crappy) stuff.