Just got this old MTB 24 speed. I keep it 24.. 24 and 21 works better for me when it comes to mountain biking.
I like to change front and back casettes-drive line. Originally 22-32-42 and five screw holes for crank pedal. But there are only 22-32-(44, fourty four) I have 42, does it matter what i mount on it.
I have searched the internet and i only find 44.