ZBROZ Timbersled X1 EXIT Center Shocks for the RIOT System provides you with ultimate control, comfort and stability for all riding conditions on your snow bike. Our coil over spring setup will deliver that smooth plush ride on those whooped out trails yet aggressive enough to handle larger hits, jumps and drops. And when riding conditions or terrain changes, fine tune your compression with a simple turn of the billet external compression adjuster knob.