In the latest edition of Elektro Rad, a well-known German magazine about e-bikes, an extensive profile of Trefecta.
From the start in 2013, the Bespoke and RDR series, the performance to the current state of affairs of the professional series. The entire article can be downloaded as a PDF below (only in German). A short summary:
The Trefecta owes its martial appearance to the fact that it was originally developed for the military. The bulky hull is more like a motorcycle – which it is, given its performance. This powerhouse is considered to be one of the most extravagant e-bikes.
Read the full article as PDF here