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SL Cx
The SL Cx series is the collective designation for the C1–C15 types of metro trains used on the Stockholm Metro from 1950 until 2024.
Some 1291 Cx cars were built in total over 40 years. They were manufactured by ASEA, Hägglund & Söner, and Svenska Järnvägsverkstäderna (ASJ), and underwent significant technical development during their production span.
The cars were typically operated in 6 or 8-car formations, which constituted a full-length train of approximately 140 metres. The Cx cars were designed for interoperability, and most types could be freely mixed within a train.
The Cx series formed the entirety of Stockholm’s metro fleet from its inception until the introduction of the C20 units in 1997. The last Cx units were withdrawn from service on the metro in February 2024, following the introduction of the C30 units in 2020. As of 2025, some converted Cx units remain in operation on Saltsjöbanan suburban railway.
The Cx series includes the car types C1, C2, C3, C4, C5, C6, C7, C8, C9, C12, C13, C14 and C15. The first units (C1) entered service when the metro first opened in 1950, with the final new cars (C14 and C15) delivered in the 1980s.
The Cx series operated on all lines of the Stockholm Metro: Green, Red, and Blue. The Blue and Red Lines were built with longer platforms, allowing up to ten Cx cars per train, while the Green Line operated with shorter trains. The Cx series was used on all lines at various times, with later years seeing C14 and C15 primarily on the Blue and Red Lines.
Traction motors and control gear from withdrawn C1-C3 cars were reused for classes C12 and C13, with C12 also reusing bogies from C1-C3 stock.
The first Cx cars (C1–C7) were delivered in green livery. C6 car 2719 was the first delivered in blue, as an experiment for the blue livery used on C8 and C9 cars. The C5 was unique in its unpainted aluminium finish. C12-C15 were delivered in green with some subsequently being repainted blue.
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SL Cx
The SL Cx series is the collective designation for the C1–C15 types of metro trains used on the Stockholm Metro from 1950 until 2024.
Some 1291 Cx cars were built in total over 40 years. They were manufactured by ASEA, Hägglund & Söner, and Svenska Järnvägsverkstäderna (ASJ), and underwent significant technical development during their production span.
The cars were typically operated in 6 or 8-car formations, which constituted a full-length train of approximately 140 metres. The Cx cars were designed for interoperability, and most types could be freely mixed within a train.
The Cx series formed the entirety of Stockholm’s metro fleet from its inception until the introduction of the C20 units in 1997. The last Cx units were withdrawn from service on the metro in February 2024, following the introduction of the C30 units in 2020. As of 2025, some converted Cx units remain in operation on Saltsjöbanan suburban railway.
The Cx series includes the car types C1, C2, C3, C4, C5, C6, C7, C8, C9, C12, C13, C14 and C15. The first units (C1) entered service when the metro first opened in 1950, with the final new cars (C14 and C15) delivered in the 1980s.
The Cx series operated on all lines of the Stockholm Metro: Green, Red, and Blue. The Blue and Red Lines were built with longer platforms, allowing up to ten Cx cars per train, while the Green Line operated with shorter trains. The Cx series was used on all lines at various times, with later years seeing C14 and C15 primarily on the Blue and Red Lines.
Traction motors and control gear from withdrawn C1-C3 cars were reused for classes C12 and C13, with C12 also reusing bogies from C1-C3 stock.
The first Cx cars (C1–C7) were delivered in green livery. C6 car 2719 was the first delivered in blue, as an experiment for the blue livery used on C8 and C9 cars. The C5 was unique in its unpainted aluminium finish. C12-C15 were delivered in green with some subsequently being repainted blue.
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