🛞 Tire Size Calculator

Professional tire size calculator with ISO 4000 standard calculations. Compare tire sizes, calculate speedometer differences, browse tire database, and analyze performance effects at tiresizecalculator.co

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📏 Tire Size Calculator & Comparison

🎯 Current/Original Tire

Width

Aspect Ratio (%)

Rim Diameter

Popular Sizes:

🚀 New/Replacement Tire

Width

Aspect Ratio (%)

Rim Diameter

Plus Sizing:

CURRENT

→

NEW

Overall Diameter

Tire Width

Sidewall Height

Circumference

Revs per Mile

Speedometer Error

Measurement	Current Tire	New Tire	Difference	% Change

🚗 Speedometer Reading vs Actual Speed

Speedometer Reading	Actual Speed (Current)	Actual Speed (New Tire)	Difference

🚗 Speedometer Calculator

Calculate exact speedometer errors and corrections for different tire sizes using ISO 4000 standard formulas.

Enter Tire Sizes for Speedometer Calculation:

Original Tire Size:

Width

Aspect Ratio (%)

Rim Diameter

New Tire Size:

Width

Aspect Ratio (%)

Rim Diameter

⚡ Plus Sizing Calculator

Calculate plus sizing options while maintaining overall diameter within safe limits (±2%).

Enter Original Tire Size:

Width

Aspect Ratio (%)

Rim Diameter

🗃️ Tire Database

Search through verified tire sizes based on ISO 4000 standards. Click any size to use in calculations.

Tire Size Database - Click to Use

🛞 Tire Size Calculator