No; strong inflection is used here because the quantity is indicated. See https://en.wikipedia.org/wiki/German_adjectives#Strong_inflection
Adjective endings are an absolute pain.
Wait, German declines thing differently based on whether an actual quantity is indicated?
So We have new bicycles and We have two new bicycles have different grammar rules in German?
They do this just to screw with the heads of anyone trying to learn the language, right?