Wheel & Tire Fitment

Plan tire and wheel upgrades with confidence using the Wheel & Tire Fitment Calculator app. It’s designed for car, truck, and SUV owners (and mechanics) who need precise, hassle-free tire comparisons and fitment checks before buying new tires or wheels.

Compare Tire Sizes: Instantly see how two tire codes differ. Get exact values for section width, aspect ratio, rim diameter, overall diameter, and circumference for both tires. Compare results side-by-side or via an overlay to easily spot differences and percentage changes.

Speedometer & Odometer: Calculate speedometer error and odometer reading changes when you change tire size. Enter a reference speed or distance and see the actual values with the new tire size (in mph or km/h).

Visual Diagrams: View scaled diagrams of each tire: side profile cross-sections and tread/front views. Overlay both tires in one image to clearly show differences in height, width, and diameter.

Wheel Fitment & Clearance: Check wheel width, offset, and spacer effects. Input original and new wheel specs to calculate inner and outer clearance changes. Warnings highlight if the new setup may rub on fenders or suspension components.

Quick Adjust: One-tap matching of tire diameter – automatically adjust the new tire’s width to maintain the same overall diameter as the original.

Flexible Units: Easily switch between Metric (mm, km/h) and Imperial (inches, mph) units to match your preference.

Share and Export: Share your comparison results via text or export a detailed PDF report to save or send to others.

Privacy and Convenience: All calculations are done locally on your device (no internet required and no data is tracked).

Whether you’re tuning for performance, safety, or just curiosity, this app gives you accurate data and visual guides to pick tires and wheels confidently. Download now and make your tire shopping easier and safer!