A refurbished unit, known as Trenbiker, is operated by Euskal Trenbide Sarea as a track geometry car.

Starting in 1942, railway operator Ferrocarriles Vascongados gradually rebuilt some of its wooden passenger cars in metal.

When Euskotren was established to operate narrow gauge services in the Basque Country, they were transferred to the new company.

[1] In their final role, the trains were painted in a white and green color scheme,[2] which gained them the nickname "Kiwis".

Since 2006 Trenbiker has been operated by Euskal Trenbide Sarea, a company established to manage the tracks on which Euskotren trains run.