It's pretty common to see performance enthusiasts upgrade to larger diameter auto tires and wheels (rims & tires). If you're not familiar with the plus sizing concept, or just need a refresher, read "Plus Sizing 101." What about the other side of the coin? Why would someone want to minus size their tires wheels package and go to a smaller wheel diameter? Listed below are a few options why going smaller makes sense:
- Winter / Snow Tire & Wheel Package: Smaller diameter wheels typically allow for a narrower tire, which results in better winter traction.
- Rough road areas: Combining taller tires with smaller diameter wheels will help absorb more impact. This setup helps protect the wheels and provides a softer ride.
- Off-road use: Many off-road enthusiasts would like to maximize their wheel protection. And many accomplish this by minus sizing their wheels and using a taller set of offroad tires.
- Economy: Often times, smaller diameter wheels and taller tires are less expensive than larger diameter wheels and low profile tires.

Yes, you can minus size to 16" on the 2000 Expedition. To keep the speedometer reading the same, use size 265/75R16.
Is this the limiting factor on how small I could go? Does this limit me to the 17" wheels with 215/55/R17?