Where is the serial No on a C.T.M HS-580 located?
The serial numbers will be located in two different locations, depending on the year of manufacture. For models after 2010: it can be on the rear part of the frame and will start with the model number (HS580) and be followed by 2 letters (indicating the color), and then 7 numbers after that. The two number after that color, will indicate the year it was made. For models before 2010: it's either on the seat post of the rear part of the frame as well. It will start with 2 numbers, followed by 3 letters, and then 4 numbers.