FKS507 - OHLINS KTM RC 390 (17/19) Front Fork Cartridge KitFront fork cartridge kit by Ohlins for KTM RC 390. The NIX technology is developed from high end racing such as WSBK. That gives us the advantage to develop a high performance product with extensive durability. Changing to the NIX 30 street cartridge kit is easy. It fits bolt on in the standard front legs and you get adjustable compression and rebound damping separated in each leg. As well as preload adjustment. All accessible from the black top caps.