CARDIO STRONG CST-BX70i Assembly And Operating Instructions Manual page 14

Step 2: Assembly of the saddle and seat tube
(1) Mount the seat (10) on the adjusting tube of the seat (11).
(2) Mount the adjusting tube on the seat post (66) with the help of the spacer sleeve
(15) and the control knob (16).
(3) The seat can be adjusted in a vertical and horizontal direction, see figure a. and b.
BX70i
14