Free Tire Size Tools
Everything you need to understand, compare, and optimize your vehicle's tires. Calculate dimensions, compare different sizes, check speedometer accuracy, find the right gear ratio, and get the best tire prices.
Find the Right Tires for Your Vehicle
Our tools help you make informed decisions about your vehicle's tires - from calculating dimensions to finding the best prices.
Tire Size Calculators
Calculate tire dimensions, check speedometer accuracy, and find the right gear ratio.
View Calculators →Size Comparison Tools
Compare different tire sizes side by side and browse comprehensive size charts.
View Comparison Tools →Price Comparison Tool
Compare tire prices from top retailers to find the best deals for any tire size.
View Price Comparison →Tire Size Calculators
Powerful calculators to determine tire dimensions, check speedometer accuracy, and find the optimal gear ratio.
Tire Size Calculator
Calculate overall diameter, width, sidewall height, and other specifications for any tire size. Compare multiple tire sizes to see how they differ.
Features:
- Calculate tire dimensions
- Compare multiple tire sizes
- View specifications like diameter, width, and sidewall height
- Find compatible alternative tire sizes
Speedometer Calibration Calculator
Determine how changing your tire size affects your speedometer reading. Calculate the actual speed vs. what your speedometer displays.
Features:
- Calculate actual speed vs. speedometer reading
- Determine speedometer error percentage
- Compare stock vs. new tire sizes
- Adjust for different speed readings
Gear Ratio Calculator
Calculate optimal gear ratios when changing tire sizes. Find the right differential gear ratio to maintain performance and fuel economy.
Features:
- Calculate optimal gear ratios
- Maintain RPM at speed when changing tire sizes
- Find the right differential ratio
- Compare different gear ratio options
Tire Size Comparison Tools
Compare different tire sizes side by side and browse comprehensive size charts to find the perfect fit for your vehicle.
Tire Size Comparison Tool
Compare different tire sizes side by side. See how changing your tire size affects diameter, width, sidewall height, and more.
Features:
- Compare multiple tire sizes side by side
- Visualize diameter and width differences
- Find compatible alternative sizes
- See percentage difference between sizes
Tire Size Comparison Charts
Browse comprehensive tire size charts that show alternative sizes, dimensions, and compatibility across different wheel diameters.
Features:
- View organized tire size charts
- Find compatible sizes across wheel diameters
- See all dimensions in one view
- Reference standard tire size conversions
Tire Price Comparison Tool
Find the best deals on tires by comparing prices from top retailers. Filter by brand, type, size, and more.
Tire Price Comparison Tool
Find the best deals on tires by comparing prices from top retailers. Filter by brand, type, size, and more to find the perfect tire at the right price.
Features:
- Compare tire prices from top retailers
- Filter by brand, size, type, and more
- View detailed specifications
- Find the best deals for any tire size
How Our Tire Tools Help You
Our comprehensive suite of tire tools helps you make informed decisions about your vehicle's tires.
Find Compatible Sizes
Discover alternative tire sizes that will fit your vehicle while maintaining proper clearance and performance.
Understand Performance Impact
See how different tire sizes affect your vehicle's speedometer reading, ground clearance, and overall performance.
Optimize Gear Ratios
Calculate the optimal gear ratio when changing tire sizes to maintain the right RPM and performance.
Visualize Size Differences
Compare tire sizes side by side to visualize the differences in diameter, width, and sidewall height.
Get the Best Prices
Compare tire prices from top retailers to find the best deal on the right tires for your vehicle.
Make Informed Decisions
Get all the information you need to choose the right tires for your vehicle, driving style, and budget.
Frequently Asked Questions
Common questions about our tire size tools and how to use them.
Are all your tire tools free to use?
Yes, all of our tire calculators, size comparison tools, and price comparison tools are completely free to use. No registration or payment is required to access any of our tools.
How accurate are your tire size calculations?
Our calculators use industry-standard formulas to provide highly accurate results. All measurements account for tire size specifications like width, aspect ratio, and wheel diameter.
Can I compare multiple tire sizes at once?
Yes, our tire size comparison tool allows you to compare multiple tire sizes side by side to see differences in dimensions, speedometer accuracy, and other specifications.
How do I find compatible alternative tire sizes?
Our tire size calculator and comparison tools will help you find compatible alternative sizes that maintain a similar overall diameter (within 3%) to ensure proper fitment and performance.
Where do the tire prices come from?
Our tire price comparison tool aggregates prices from top tire retailers to help you find the best deals. Prices are updated regularly to ensure accuracy.
Can I use these tools on my mobile phone?
Yes, all of our tire tools are fully responsive and work perfectly on desktop computers, tablets, and mobile phones for convenience wherever you are.
Find Your Perfect Tires Today
Use our comprehensive tire tools to find the right size, compare options, and get the best price for your vehicle.