๐ Tire Size Calculator & Comparison
Metric (mm)
Imperial (inches)
๐ฅ Compare Tires
Measurement
Current Tire
New Tire
Difference
% Change
๐ Speedometer Reading vs Actual Speed
Speedometer Reading
Actual Speed (Current)
Actual Speed (New Tire)
Difference
๐ Speedometer Calculator
Calculate exact speedometer errors and corrections for different tire sizes using ISO 4000 standard formulas.
Enter Tire Sizes for Speedometer Calculation:
๐ฅ Calculate Speedometer Error
At 60 MPH Shows
-
Speedometer reading
Actually Going
-
True speed
Complete Speedometer Correction Table
Speedometer Reading
Actual Speed (Original)
Actual Speed (New Tire)
Speed Difference
Error %
โก Plus Sizing Calculator
Calculate plus sizing options while maintaining overall diameter within safe limits (ยฑ2%).
Enter Original Tire Size:
Calculate Plus Size Options
๐๏ธ Tire Database
Search through verified tire sizes based on ISO 4000 standards. Click any size to use in calculations.
All Rim Sizes
15" Rims
16" Rims
17" Rims
18" Rims
19" Rims
20" Rims
All Categories
Passenger Car
Performance
Light Truck/SUV
Tire Size Database - Click to Use