Tire Upsizing guide
Note: Calculator designed for modern Metric Radial tires. Bias-ply support coming in V2.0.
Check your tire's sidewall for the following dimensions
TOTAL DIAMETER: 0.0 mm
Pressure Recommendations
Estimated Optimal Range
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Disclaimer: This is a general guideline based on tire volume. Always refer to your vehicle's door placard or owner's manual for the manufacturer-specified cold tire pressure.
Smart Upsize Engine
Suggestions are mathematically constrained to ±3% rotational variance and filtered against ISO/ETRTO standard commercial tire sizes.
Suggestions within ±3% variance. Keeping your speedometer accurate.
DOT Age Checker
Where to find it?
Look for the letters "DOT" followed by a series of characters. The last 4 digits (often in a raised oval) represent the week and year of manufacture.
TireBuddy Safety Note
⚠️ Important: This check is for age only. Even if your tire is young, always check your tread depth. If the tread is worn down to the wear bars, replace your tire immediately regardless of its age!