Quick answer: Lug nut torque is set by the vehicle and wheel manufacturer and varies by model, wheel and fastener, so it cannot be calculated from thread size alone. Pick your make below to open its reference page, compare two tire sizes for diameter and speedometer error, or follow the star tightening order. Always confirm the torque in your owner’s manual.
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Free Tire Size Calculator & Lug Nut Guide
Compare tire dimensions, estimate speedometer error and clearance changes, calculate approximate revolutions per mile, view a lug-tightening sequence, and convert a verified torque specification. Runs locally in your browser.
Lug Nut & Wheel Installation Guide
Confirm thread size and pitch using vehicle or fastener manufacturer information.
Enter only after confirming it applies to your vehicle and wheel setup.
Installation reference
Tightening order (numbered lugs): Use the sequence as a general cross/star pattern guide; follow the vehicle or wheel maker’s exact procedure.
Safety notice: This tool does not calculate or prescribe torque from thread size, lug count, seat type, or wheel material. Use the exact torque and installation procedure specified by the vehicle and wheel manufacturers. Do not assume aftermarket wheels use the same hardware or torque as factory wheels. Follow the manufacturer's tightening and recheck instructions.
Tire Size & Diameter Comparison
For example, a 225/60R17 tire uses width 225 mm, aspect ratio 60, and a 17-inch wheel.
Estimated comparison
This is a nominal mathematical estimate, not a fitment guarantee. Radius change estimates how much closer the tire may sit to the fender and how much ground clearance may change. Width is nominal section width—not guaranteed sidewall clearance. Actual dimensions vary by tire model, rim width, load, inflation and wear. Check suspension, fender, steering and load clearances before changing sizes.
Lug Nut & Tire Size FAQ
Where do I find lug nut torque specs for my vehicle?
Choose your vehicle’s make in the list on this page to open its reference page, then confirm the value for your exact year, model, wheel and fastener setup in the owner’s manual or official service information. The calculator here converts a torque value you have already verified between lb-ft, N·m and lb-in; it does not look up factory specifications.
Can lug nut torque be calculated from thread size alone?
No. Correct torque depends on vehicle and wheel manufacturer requirements and installation conditions. Use the owner’s manual or official service information rather than a generic estimate.
What order should I tighten lug nuts in?
Tighten in a star (criss-cross) pattern instead of going around the circle so the wheel seats evenly against the hub. The Lug Nut Guide shows the order for 4-, 5-, 6-, 8- and 10-lug wheels. If your vehicle or wheel manufacturer specifies a different procedure, follow it.
Should I re-check lug nut torque after driving?
Many vehicle and wheel manufacturers recommend re-checking torque after a short drive, commonly around 50 to 100 miles, especially after fitting new or aftermarket wheels. Follow the interval in your owner’s manual.
How do I compare two tire sizes?
Enter each tire’s width in millimeters, aspect ratio, and wheel diameter in inches. The calculator estimates overall diameter and related differences, including speedometer and ground-clearance changes. These are nominal estimates; actual dimensions vary by tire model and manufacturer.
How do I read a tire size like 225/60R17?
225 is the section width in millimeters, 60 is the aspect ratio (sidewall height as a percentage of width), R means radial construction, and 17 is the wheel diameter in inches.
How much can I change tire diameter before the speedometer is off?
A commonly cited guideline is to keep overall diameter within about 3% of the original size. A larger tire makes the speedometer read lower than your true speed. Use the diameter difference and speedometer estimate to check a new size, then verify clearances and load rating.
Lug Nut Torque Specs by Vehicle Make
Choose your vehicle’s make to open its tire and lug nut reference page. Torque and fitment details can vary by model year, trim, wheel and fastener setup, so confirm the figure for your exact vehicle in the owner’s manual or official service information before tightening.
- Acura
- Audi
- BMW
- Buick
- Cadillac
- Chevrolet
- Chrysler
- Dodge
- Fiat
- Ford
- GMC
- Honda
- Hyundai
- Infiniti
- Isuzu
- Jaguar
- Jeep
- Kia
- Land Rover
- Lexus
- Lincoln
- Lotus
- Mazda
- Mercury
- Mini
- Mitsubishi
- Nissan
- Oldsmobile
- Plymouth
- Pontiac
- Porsche
- Ram
- Saab
- Saturn
- Scion
- Subaru
- Suzuki
- Tesla
- Toyota
- Volkswagen
- Volvo
How to Read a Tire Size
A tire size such as 225/60R17 lists the section width in millimeters (225), the aspect ratio, which is sidewall height as a percentage of width (60), radial construction (R), and the wheel diameter in inches (17).
How the Calculators Work
Overall diameter in inches equals the wheel diameter plus twice the sidewall height, where sidewall height is width × aspect ratio ÷ 100 ÷ 25.4. Revolutions per mile equal 63,360 inches ÷ circumference. Actual speed equals indicated speed × new diameter ÷ original diameter. Torque conversions use 1 lb-ft = 1.3558 N·m and 1 lb-in = 0.11298 N·m. All figures are nominal; real tires vary by brand, rim width, load, inflation and wear.
About TireNut
TireNut is a reference for lug nut torque specifications, tire sizes and wheel-fastener basics, for seasoned mechanics and first-time tire changers alike. Verify every specification against your vehicle manufacturer’s instructions.
*Note: Always verify lug nut torque and factory tire size specifications by referring to your owner’s manual.
Tabla Gráfico en Línea: Torque de Ruedas y Llantas
*Aviso: Es esencial que verifiques los valores y especificaciones para torque de tuercas y tamaño de los neumáticos de fábrica consultando el manual del propietario (Diagrama de dueño).
