A couple more questions......
Does it matter if you are standing or sitting?
Have you tried to see if it happens when you are really standing hard on the pedals or just going easy? Also, try pedaling with just one pedal at a time to see if its a pedal or possibly cleat if you have those.
Did you try resetting the wheels again in the dropouts after going off the curb and seeing if the noise went away again? Personally, that is where I would probably start, since that seemed to fix it last time.
Can you get the noise if someone is holding the bike up and you rotate the crank?
Something many do not think about, is your chain properly lubed?
What kind of hubs are you running and how old are they?
Does it matter if you are standing or sitting?
Have you tried to see if it happens when you are really standing hard on the pedals or just going easy? Also, try pedaling with just one pedal at a time to see if its a pedal or possibly cleat if you have those.
Did you try resetting the wheels again in the dropouts after going off the curb and seeing if the noise went away again? Personally, that is where I would probably start, since that seemed to fix it last time.
Can you get the noise if someone is holding the bike up and you rotate the crank?
Something many do not think about, is your chain properly lubed?
What kind of hubs are you running and how old are they?