YT Industries Jeffsy needle bearing kit for frames with a 10mm rear shock thru-bolt and 40mm mounting span. ONLY FOR VERSION 1/MKI FRAMES (manufactured through 2018). 2019 "MK2" Jeffsy frames use the 8mm kit. This kit is for one end of the shock--the back end--where it connects to the rear triangle.

Our NEEDLE BEARING CONVERSION KITS are a new, better way of doing things. Our top quality hardened steel needle bearing take the place of the DU bushing. The needle bearing is matched with a hardened, polished inner ring (axle) that, when used with the supplied spacers, is a perfect fit between the rocker arms or frame mounts. When the shock hardware is tightened, the needle bearing axle is locked into place. No side loading is applied to the bearing or the shock body in any way. Sealed spacers center the shock and protect the bearing.