Hi, I am new here. And I just find this video form the facebook of promobricks. I can see clearly double red shock absorbers on the rear wheel. There is also a relatively large grey block behind the rear wheel. I am not sure what it is. Could it be related to PF?
Here is the link:
https://www.facebook.com/Promobricks/videos/987953467929023/
I hope I got this right. Anyway, first post.