I'm creating a commutter from an old mountain bike - a 2006 specialized rockhopper pro.
I have a bunch of components hanging about and I have a Shimano Zee front crankset with a 38t and I have a 50t ring (104 bcd compatible). With long chainring bolts/nut I could get a 50t ring and the 38t on it. A set up a bit like a compact chainring on a road bike.
Rear is a 10 speed casette long cage slx. I have been running it wiht a 1x10 for mountain biking use but essentially I am trying to add a 50t on the front and still wrangle it so the chainline is ok.
I also have a fairly old front mech bottom pull and a new-ish slx front shifter that is 2/3 speed compatible.
Issues I may face: - distance between chainstay and 50t ring - chainline - length of chain for 50t ring and biggest ring on 10 speed at the back. - left shifter doesn't work with old front derailler.
Most mountain bike triple chainrings have a 48t large ring. Is there any reason I couldn't use the 50t ring?