The new chain tensionning is very interesting: it uses a Shimano derailleur with a specific cage with only one pulley and an additional separate chain tensionning arm. I note that they prefer this system to the previous Ltwoo derailleur.:


The fact that the production is currently delayed as they are "still finalizing" the alloy components of the hinge is a little bit scaring as it mean that they obviously had problems with the previous model (the Tour is an evolution of the previous model).