Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 85557 Train Wheel RC Train, Spoked with Technic Axle Hole and Counterweight, 37 mm diameter [Flanged Driver] Sub-part of this part
• 85558 Train Wheel RC Train, Spoked with Technic Axle Hole and Counterweight, 30 mm diameter [Blind Driver] Sub-part of this part