Does anyone know a resource for decoding late-model (not vintage) Trek serial numbers? I'm trying to figure out if the Domane I bought in June is a 2020 or 2021 model. From what I have been able to find out, the last digit in the serial number ('R' in my case) is supposedly a year code, but I don't know what year 'R' corresponds to, or whether that's a model year or a calendar year. I don't know if there are any differences between the 2020 and 2021 Domane, and I think my bike's color (Crystal White) was offered both years.