Cub Cadet lawn mower - $100 (Wright City)

Cub cadet self propelled rear drive mower.
Runs and cut good.
Comes with side discharge, bag and mulching.
Starts easy and is in overall good sharp.
The right rear wheel has an issue where it moves up and down.
Not sure if it has a broken or missing part.
It still mows and I am currently still using it.
Can be used as is or parted out.
Pick up or locate meet(wright city area).
Thanks for looking.