Tire Size & Fitment Upsize
Yaniv van der Stigchel · Utilities
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Chart standing · US
What changed · US
Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.
Scan your tire: the size, load and speed rating and DOT date are read on your device, with a tire-age verdict. Your first run needs just one size to get an answer. The garage shows each tire's age, and the drawing animates the fit and the rub point.
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About
Before you spend several hundred on new tires, find out what they will actually change. Tire Size compares any two sizes and tells you the truth about the swap: the real diameter difference, how much the ride height moves, what happens to your gearing, and how far out your speedometer will read. WHAT IT TELLS YOU Speedometer error, in figures. Your speedometer is calibrated for the size that left the factory. Change the rolling diameter and it lies to you. This shows by how much, at 60 mph for free, and at every speed you drive with Pro. The diameter and sidewall change. In millimeters and in inches, with the percentage difference, so you know whether it clears. Ride height and clearance. How much higher or lower the car sits, and how much closer the tire gets to the arch. Effective gearing. A taller tire changes your final drive ratio whether you wanted it to or not. See it before you feel it. Both notations. Metric like 225/45R17 and imperial like 33x12.50R15, in the same comparison. Cars, light trucks and motorcycles. Sizes that fit. Going up a rim size? It lists the sizes that stay within 3% of the one on the car. Saved vehicles (Pro). Keep your stock, winter and upgrade sizes for each car and switch with one tap. Share the comparison with your shop, or with whoever is telling you it will be fine. WHAT IS FREE The full comparison — diameter, height, speedometer error and gearing — is free, and stays free. A single payment adds saved vehicles, up to four sizes side by side, and the full speedometer table. No account. No subscription. No ads. Every calculation runs on the device, so it works in a parking lot with no signal.
What's new · 1.1
Scan your tire: the size, load and speed rating and DOT date are read on your device, with a tire-age verdict. Your first run needs just one size to get an answer. The garage shows each tire's age, and the drawing animates the fit and the rub point.
Details