Schwinn 130 Assembly Manual / Owner's Manual page 13

5. Install Seat Post on Frame
NOTICE: Make sure the Adjustment Knob engages the Seat Post.
Do not set the Seat Post position higher than the stop mark (STOP) on the tube.
6. Attach Seat to Seat Post
NOTICE: Be sure the Seat is straight. Tighten both nuts (12b) on the Seat bracket (12a) to hold the Seat in position.
10
11
12
STOP
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12a
12b
12b
13