Swap crank
I’m looking at a new Emonda, has an Ultegra Di2 system, also a 52/36 crank. I would prefer a 50/34 crank, not sure that’s a swap the shop wants to do for me, so I might just buy an 50/34 Ultegra crank. Is this as simple as removing old crank, installing new, sliding down and positioning the F derailer, checking and adjusting the shifting ?. Can the 50/34 use the same bottom bracket as the 52/36 ?. Trek specs says it’s a Praxis T47 threaded if it matters,