 In turn, the truck frame bears the weight of the bolster via the double central suspension; the bolster bears the weight of the car directly.The truck frame is additionally reinforced at the attachment points for the suspension swing links.On early trains, the central suspension incorporated elliptical leaf springs, but from 1965 onward they were replaced with coil springs, which increased the maximum suspension travel from 95 to 120 mm (which reduced the risk of bottoming).