a suspension system for a train vehicle includes at least one inerter to minimize track wear . track wear may be measured by direct measures such as wear work , or indirect measures such as yaw stiffness . “ minimizing ” track wear means that such measures are reduced below values which are achievable with conventional technology while maintaining acceptable values of other performance metrics , such as ride comfort or least damping ratio . the suspension system may comprise at least one damper connected in series with the at least one inerter . the suspension system may be the primary or the secondary suspension system of a train vehicle .