SL C20

The SL C20 is a type of subway train used on the Stockholm Metro in Sweden. Between 1997 and 2004 the former Kalmar Verkstad, owned by Adtranz and later acquired by Bombardier Transportation, delivered 271 three-car sets numbered 2000 to 2270. It was a completely new design, not compatible with the other train types of the system, and each carriage at 46.5 metres is longer than those before it. To save cost and weight each unit has only four bogies, the middle car carrying two and each end car one, with trolley subframes in stainless steel. It was the first new rolling stock for the Stockholm Metro since the C14 and C15 of the mid 1980s and was advertised at launch as Vagn 2000. The only customer outside Stockholm was Bucharest, which ordered 18 MOVIA 346 trains based on it in 1999. The C20F prototype uses a stainless steel skin bonded to a composite core, and the sets were refurbished between 2019 and 2023.