Effects of changing tire size
How Tire and Wheel Weight Affect Fuel Economy
How much tire and wheel weight affect fuel economy: what the sidewall numbers mean, how rotating mass and rolling resistance change energy use, with worked examples.
Choosing Tire Size for Rock Crawling: From Sidewall Numbers to Real-World Fit
How to choose a tire size for rock crawling: read sidewall markings, calculate sidewall height and diameter, and see how size changes clearance, gearing and fit.
How Tire Size Affects Gas Mileage: Reading the Sidewall and Comparing Sizes
How tire and wheel size affect fuel economy: how to read sidewall markings, calculate diameter and circumference, and correct odometer error after a size change.
Matching Bicycle Tire and Rim Widths for Aerodynamics: From Sidewall Numbers to Real Fit
How to read bicycle tire and rim markings, estimate measured tire width, apply the tire-to-rim width ratio, and understand how width changes diameter and circumference.
What Makes a Tire Fuel Efficient? Reading the Sidewall, the Label and the Size
How to read tire sidewall numbers, what rolling resistance and the fuel-efficiency label mean, and how tire width, aspect ratio and rim size affect energy use.
How Larger Wheels Affect Electric Car Range: From Sidewall Numbers to Energy Use
How bigger wheels change EV range, starting with the tire sidewall: width, aspect ratio, rim diameter, sample calculations, and limits of size comparisons.
Speedometer and Odometer Calibration After Changing Tire Size
How to read tire sidewall sizes, calculate diameter and circumference changes, estimate speedometer and odometer error, and recalibrate after a tire size change.
How Tire Size Affects Ground Pressure and Flotation on Soft Terrain
How sidewall numbers translate into tire width, diameter and contact patch, and why bigger tires improve flotation mainly by allowing lower inflation pressure.
How Trailer Tire Size Affects Towing Stability, Starting With the Sidewall Numbers
How trailer tire width, aspect ratio, rim size, load range and pressure affect sidewall flex, ride height and sway, with worked size calculations and limits.
How Tire Width Affects Hydroplaning: Reading the Sidewall and Understanding the Contact Patch
Learn how tire width affects hydroplaning, starting with the sidewall numbers. See how section width, aspect ratio and rim size change the contact patch and geometry, and what matters more than width.