The K-Tech Reservoir/Bladder kit is designed to fit most all 4618 PDS (KTM85/105), 5018 PDS and 5018 Linkage bikes. This product is a great performance modification for any KTM or Husaberg rider. The machined aluminum tube is hard coat anodized for durability and promotes better cooling of the shock. The bladder system reduces internal friction which provides a smoother action and reduces shock fade. The K-Tech style bladder cap allows for much easier servicing of the shock.