ST BB will be a lot more durable and less maintenance also.
Old early-90s Shimano ST MTB triples with the spaced-out granny gear may be something to consider for this project if you want a bit more versatility than you'd get from a 1x setup; you can run them as a triple or a 110 compact double just by choosing different BB spindle lengths. M730 and M900 are two specific models that spring to mind.
ST BB will be a lot more durable and less maintenance also.
Old early-90s Shimano ST MTB triples with the spaced-out granny gear may be something to consider for this project if you want a bit more versatility than you'd get from a 1x setup; you can run them as a triple or a 110 compact double just by choosing different BB spindle lengths. M730 and M900 are two specific models that spring to mind.