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.

• 66727 Wheel 18 x 12 with Pin Hole and Stud Alternate of this part
• 18977 Tyre 24 x 12 Low Profile this part is a pair of it
• 18978a Wheel Cover 5 Spoke - for Wheel 18976 Pair of this part
• 18978b Wheel Cover 10 Spoke - for Wheel 18976 Pair of this part
• 18979a Wheel Cover 10 Spoke T Shape - for Wheel 18976 Pair of this part
• 18979b Wheel Cover 7 Spoke Y Shape - for Wheel 18976 Pair of this part
• 24308a Wheel Cover 10 Spoke (2 Spokes each parallel) - for Wheel 18976 Pair of this part
• 24308b Wheel Cover 10 Spoke Y Shape - for Wheel 18976 Pair of this part
• 29117a Wheel Cover 5 Spoke Wide Pair of this part
• 29117b Wheel Cover 5 Spoke Framed Pair of this part
• 49098 Hub Cap 24mm without Tube Pair of this part
• 58090 Tyre 30.4 x 14 VR Solid this part is a pair of it