This kit includes drive side and non-drive side adapters for bicycles with 12x142 or 12x148 thru axles. Note: This adapter is compatible with KICKR CORE and KICKR v4(2018) and newer models of KICKR. FEATURES: Compatibility: KICKR CORE and KICKR V5 and newer models Note: Kit also includes Shimano style and SRAM XD/XDR style freehub lock nuts that need to be installed