No, it's all okay. Cable pull, that is. I have them on Tiagra flat bar levers and they work just fine. But the brakes on the Preamble are actually Tektro HD-M276, according to the leaked issuu document. 141 mm boost QR rear hub as well, so maybe a bit of a pain in the butt for those wanting to upgrade wheels? I haven't taken a deep dive into 141 mm hubs, but you need boost 148 with end caps I guess. *Edit: Maybe it's Gnot-Boost? 138 mm spacing allows for 141 mm and 135 mm QR hubs. All things considered, I am actually preparing to build something that is basically the same as this bike this spring (a budget ATB/bikepacker), so bikes like this and the new Space Horse are very much on my radar at the moment.

Issuu Leak Document:
https://webcache.googleusercontent.c...&ct=clnk&gl=us