Originally Posted by
goldfilm
Should I go to the bike shop and ask for an exchange?
That looks like more of a gouge than a crack, but yes, you should. At least try. They may try to claim that you did it, and it's really your word against theirs.
Originally Posted by
goldfilm
Would they tell me it's "normal" from the assembling process?
They might try. It's not normal, but they might say it is.