This control and shock link set allows you to convert the suspension travel of a Blackthorn 1.0 frame to the 165 mm rear travel found on Cassidy 1.0.Also acts as a replacement for existing Cassidy 1.0 Control or Shock LinkFits 2020 2024 Blackthorn and Blackthorn C 1.0, and Cassidy and Cassidy C 1.0; will NOT fit 2025+ Blackthorn C 125 or Blackthorn C 145Use ONLY with 230 x 62.5 air shockBest paired with a 170-180mm suspension forkPlease consult the Split Pivot+ instructions for complete conversion requirements and steps Salsa Cassidy 1.0 Control and Shock Link Suspension Part UPC: 657993282625