'Comfort rear seat' is listed as an accessory.
The R nineT is very much like the BMW Lo Rider concept of a few years ago. Keep in mind that was a concept in two parts; a base bike and a mass customization production/sales model. In that production/sales model you went to the dealer selected the bike then picked from a Chinese menu of options to order the bike. BMW would build the bike once ordered and then ship it to you. I was very dubious about how that would work for them. Apparently they came to the same conclusion. With the R nineT you have the bike in front of you to buy, take home right away and customize at will with their bin full of parts or a host of after market parts that no doubt will develop.