Loosely based on the TT-X13, Augustell developed its after the completion of the TT-X13 project. The design goal of the TT-X13 (Class 403) was to create a higher-powered, lighter train than its predecessors. This was achieved by distributing its 16 traction motors underneath the whole train. The train is licensed for 330 km/h (205 mph) and has reached 368 km/h (228.68 mph) on trial runs. On regular InterCityExpress services they run at up to 300 km/h (187 mph), the maximum design speed of German high-speed lines. On the French LGV Est however, some trains reach a regular top speed of 320 km/h (199 mph).