Replacement shock link for Blackthorn 1.0 frames. Allows for conversion of Cassidy 1.0 frames to 140mm rear travel found on Blackthorn in pairing with FS0028 Fits Blackthorn 1.0, Blackthorn C 1.0, Cassidy 1.0, and Cassidy C 1.0 (2020+) Use ONLY with compatible 210 x 52.5-55 mm-stroke air or coil shocks Best paired with a 140-160 mm suspension fork Includes bolts Please consult the Split Pivot + instructions for complete conversion requirements and steps