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.

• 4180c02 Brick Special 2 x 4 with Wheels, Freestyle Red this part is a sub-part of it
• 132a Tyre Smooth Old Style - Small this part is a pair of it
• 132b Tyre Smooth Old Style - Small Hollow (Air Tyre) this part is a pair of it
• 132c Tyre Smooth Old Style - Small with Teeth this part is a pair of it
• 2346 Tyre 30 x 10.5 Offset Tread this part is a pair of it
• 3483 Tyre Offset Tread 24 x 8 this part is a pair of it
• 3634 Tyre 43 x 17 this part is a pair of it
• 4180c01 Wheels Train Spoked Small (23mm D.) and Black Brick, Modified 2 x 4 [Black] this part is a pair of it
• 4180c03 Brick Special 2 x 4 with Wheels, Freestyle White this part is a pair of it
• 4180c04 Wheels Train Spoked Small (23mm D.) and Black Brick, Modified 2 x 4 [Red] this part is a pair of it
• 4180c05 Wheels Train Spoked Large (29mm D.) and Black Brick, Modified 2 x 4 [Red] this part is a pair of it
• 44799 Tyre with Centre Groove [Tightrope Guide Wheel] this part is a pair of it
• 498 Technic Tread Crawler this part is a pair of it
• 498a Technic Tread Crawler Wedge this part is a pair of it