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.

• 13971 Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Pair of this part
• 242c01 Wheel Spoked with Stud Pair of this part
• 30155 Wheel Spoked 2 x 2 with Pin Hole Pair of this part
• 3482 Wheel with Split Axle hole this part is a pair of it
• 4180c02 Brick Special 2 x 4 with Wheels, Freestyle Red Pair of this part
• 4259 Wheel Freestyle with Freestyle Pin Hole Pair of this part
• 56902 Wheel 18 x 8 with Fake Bolts and Shallow Spokes Pair of this part
• 56903 Wheel 18 x 8 with Fake Bolts and Shallow Spokes and Axle Hole Pair of this part
• 6248 Wheel Freestyle with 2 x 2 Studs and Pin Hole Pair of this part
• 7039 Wheel Old with 4 Studs Pair of this part
• 7039b Wheel Old with 4 Studs and Axle Cam for Motor Pair of this part
• 7039c Wheel Old with 4 Studs and Traction Teeth Pair of this part
• 7039d Wheel Old with 4 Studs without inner Side Supports (Old Lego Logo) Pair of this part