Yes, all calculators and tools on Tire Size Hub are completely free. No signup required. No data is sent to our servers — everything runs in your browser.
Our calculations are based on standard tire industry formulas. They are accurate for comparing tire dimensions, but always verify with a tire professional before purchasing, as manufacturing tolerances can vary by brand.
It depends on your current gear ratio and how much bigger the new tires are. Use our Gear Ratio Calculator to see if your effective ratio drops below the recommended range for your engine and transmission.
All-weather tires carry the three-peak mountain snowflake symbol and are certified for winter use. All-season tires do not have this certification and perform poorly in cold, snowy conditions.
You can, but it is not recommended. Winter tires should be narrower with a taller sidewall for better snow traction. Use our Tire Size Calculator to find the right minus-size option for winter.
Yes. EVs are heavier and have more instant torque, which wears standard tires faster. EV-specific tires have reinforced sidewalls, higher load indexes, and often include acoustic foam to reduce road noise.
Check three things: tire diameter clearance, wheel offset vs. suspension components, and backspacing. Our Wheel Offset Calculator helps you compare your stock specs to new wheels before you buy.
Your speedometer is calibrated to your stock tire diameter. Larger tires rotate fewer times per mile, so the speedometer reads slower than your actual speed. Our Tire Size Calculator shows the exact percentage error.