By guessing
https://www.rsracing.com/tech-wheel.html this link has ALL the information regarding how and where a tire ends up when it is connected to the lugs. Basically, back spacing is how far the edge of the...
In millimeters (mm)
5.25"
Hot Wheels has made a line of cars with changeable snap-fit parts. There are 3 ranges: Starter packsPower packsDeluxe Attack packs
you can usually find these toys in places such as Tesco's, Toy's r us or any other major toy seller
Catherine Wheel Stitching Tips
Choosing Custom Wheels and Tires
How to Select and Install Custom Wheels and Tires
Maintenance Disposal of Old Wheels and Tires