To incorporate aided by the X1'21 chassis side braces, the rear link brace had been redesigned included in the framework Multi-Flex system and functions since the mounting point for the separate wing mount system. The rear website link brace design allows for many battery positioning changes and features a convenient O-ring battery pack mounting system. The graphite back website link brace is the mounting point the part tubes and side springs, and functions as a backstop the battery power also.
