It makes zero sense for Canyon to perform assembly in the US. They won't ship enough bikes for the air freight prices to overcome the additional manpower cost. They are simply shipping complete bikes to a small California-based factory/office and then shipping them again from there.
Air freight? I would guess if Canyon has a desire to go bankrupt as quick as possible, they would use air freight. Otherwise, they will use container ships from China to the USA or Germany. And trucks within the USA. And trucks within Europe. No airplanes ever. Airplanes equal expensive.
As for whether Canyon will ship from China to California or Germany. It might not make much difference in distance. Beijing China (I know the bikes won't be made in Beijing, but its a common China city) to Los Angeles California is 10,000 kilometers. Beijing to Hamburg Germany is 7500 kilometers. Los Angeles to New York City is 4000 kilometers. So if Canyon is selling bikes to the entire eastern seaboard of the USA, its closer to bring the bikes from Beijing to Germany to USA. I figure Chicago is about the middle distance wise. Same distance to Chicago from Beijing whether you go to LA first or Germany first. For more than half the USA population, its closer to Beijing through Germany than going across the Pacific Ocean.
Nope-going ocean freight, Shanghai to Los Angeles is 15-16 days, while Shanghai to Hamburg/Bremerhaven is 32-35 days.
From Los Angeles, figure 5-7 days by rail to Chicago, and 10-14 days to the US East Coast.
Ocean freight forwarding happens to be my day job.