My wife is an avid cycler. Road and off-road bikes. I would not use any resin-printed part for a load-bearing component on a bike. If you’re clamping a bell to the handlebars, resin is fine. If it’s holding the seatpost, probably not a good idea.
If you wouldn’t use injection molded plastic for the part, IMO you don’t want to use a resin-printed part. Resins approximate plastics not metals.
But you can get the part prototyped in resin for “dry fit” purposes, and then send the model to Shapeways to get it printed in actual T6061 for a functional prototype.