the original shimano un71 was 73mm x 113mm.

Its dead.

i am thinking of running a modest 1x9 drivetrain here for city and some light trail.


Would 113mm still be the right spindle length for this type of thing. I have a sram x5 front with a x9 rear i am thinking of running. IF anyone can make a recommendation here for bottom brackets that would be great. I could probably even go more modern and use a hollowtech style bb and try to source a proper length crankset i suppose. The hollowtech bbs are cheap. I am thinking of a 36 - 40 chain ring up front.