KTM 125 SX 2019-2021KTM 150 SX 2019-2021KTM 250 SX 2019-2021KTM 250 SX-F 2019-2021KTM 350 SX-F 2019-2021KTM 450 SX-F 2019-2021Husqvarna TC 125 2019-2021Husqvarna TC 250 2019-2021Husqvarna FC 250 2019-2021Husqvarna FC 350 2019-2021Husqvarna FC 450 2019-2021 The WP XACT PRO 7448 air fork combines two of WP’s greatest technologies: The Cone Valve damping system and the AER spring system. This fork with split technology has been developed in close collaboration with current World Championship riders aboard many different motorcycle brands.The Cone Valve damping leg is an evolution of the traditional Cone Valve fork with damping optimized for use in combination with an AER spring leg.The AER spring leg was developed with maximum possible performance, almost unlimited configurations and the easiest possible handling in mind.