Stealth Hitch (and there are others) makes a trailer hitch for the Model 3. Considering the similarities between the 3 and the Y I would expect them to come out with a trailer hitch for the Model Y soon. I have the Stealth Hitch on my Model 3 and it works fine for pulling small utility trailers short distances. Have also used the small cargo carriers that connect into the hitch. I don't see a bike rack being a big deal but have never used one.