I'm in the process of replacing parts on my stiff fork/hardtail mtb commuter, and one of the important ones im replacing is the crankset; however, most mtb chainrings only have 42 teeth, I'm used to the current 52 my bike has, so would a road crankset be compatible with a mtb rear derailer, shifters and cassette? (These are going to be alivio 8speed when replaced)