About Tire Comparison Calculator
High-precision wheel & tire dimensional modeling, real-time dynamic vector visuals, and speedometer calibration diagnostics.
TireComparisonCalculator.com helps you compare wheel and tire changes before choosing a new size. Use it for wheel upgrades, larger truck tires or lower-profile track tires.
The diagrams draw both tires to the same scale, beside their measurements. You can compare ground contact, sidewall profiles and rolling circumference. Changes appear as you update the size inputs.
What Sets This Tool Apart
True Millimeter Proportions
Dynamic SVG vector rendering calculates sidewall heights, wheel lip radiuses, and rim widths on exact mathematical ratios.
Interactive Speedometer Testing
Simulate actual vehicle velocity versus dash readout at highway reference points from 20 to 120 MPH.
3.0% Safety Tolerance Engine
Instant alerts verify whether your prospective setup remains within factory transmission, ABS, and AWD tolerances.
Zero Tracking & Local Processing
100% of calculations execute directly in your browser with zero latency and complete privacy.
Engineering Philosophy
Whether you are calculating a Plus 1 sport setup, fitting 33-inch mud tires on a 4x4 pickup truck, or selecting narrower winter tires to bite through ice, dimensional accuracy is essential to vehicle stability and transmission longevity.
Who Runs This Site
TireComparisonCalculator.com is an independent website owned and operated by Shakeel Lodhi, supported by a small team of web developers and automotive enthusiasts. We are not affiliated with any tire manufacturer, wheel brand, or retailer, and we do not accept payment to recommend specific products or sizes. Our only goal is to give drivers, mechanics, and fitment builders a fast and accurate way to compare tire sizes before they buy.
How We Keep the Math Accurate
- Industry-standard formulas: diameters, sidewall heights, and circumferences follow the ISO metric tire designation used by ETRTO (Europe) and the Tire and Rim Association (North America): sidewall = width × aspect ratio, diameter = rim + 2 × sidewall.
- Cross-checked results: calculator output is checked against published diameter and revolutions-per-mile figures from tire manufacturers' specification sheets for common sizes.
- Transparent limits: nominal sizes are estimates. Real tires vary by brand, tread design, rim width, and inflation, which is why every result should be confirmed with the manufacturer's data and a qualified installer.
- Corrections welcome: if you spot a size that looks wrong, report it through our contact page and we will review and fix it.
Free and Private by Design
The calculator is free to use, requires no account, and runs entirely in your browser. Read our privacy policy for details on what little data the site handles, and our terms and conditions for the engineering disclaimers that apply to every estimate.