KNK 906 90mm Boss Black Matte Shocks FasTrack - Crossing Most of the series are

Most of the series are still in service today

This is a freight car in a great design for the super hero Superman

24 precision rubber-sealed ball bearings

the rare S/C (semi-competition) version that in reality was a thinly disguised race car

and rails for railroad track

KNK 906 90mm Boss Black Matte Shocks FasTrack - Crossing Most of the series areKNK 906 90mm Boss Black Matte Shocks 1 Pair Team KNK 90mm Boss Shocks are specifically designed for 1 10 scale rock crawlers and trail trucks, providing a perfect performance upgrade. These pre assembled shocks offer smooth, buttery damping action and feature a fully threaded body that allows for precise adjustability. Constructed with CNC machined aluminum components, these shocks are built to last. FEATURES: Perfect performance upgrade for 1 10 rock