To know the effects of tire width and diameter on performance and efficiency of vehicles I suggest a look at tires on various types of vehicles:
1. Formula One racing vehicle
2. Land speed record vehicle
3. Dragster vehicle
4. Solar powered vehicle
5. Passenger car vehicle
6. Agricultural tractor vehicle
7. Strip mining ore-carrying truck vehicle
What are the differences in tire width and diameter on these vehicles? Why do you think those tire widths and diameters chosen?