Tire Calculator (Offset&Speed)

iOS Universel / Utilitaires

Easily calculate the effects of wheel and tire size changes
A convenient calculation tool for anyone considering wheel upgrades, tire size changes, or fitment adjustments.
Simply enter your current and new specifications to quickly compare the impact on your vehicle.

-Main Features
-Wheel Comparison
•Calculate inner rim position changes
•Calculate outer rim position changes
•Calculate tread width changes

-Tire Comparison
•Calculate speedometer error (%)
•Compare indicated speed and actual speed
•Vehicle-specific speedometer error can also be included in calculations

-Speedometer Error Measurement
•Accurate GPS-based speed measurement

-Data Storage
•Save comparison records

-Important Notes
Measurement results may vary depending on GPS reception and environmental conditions. Use measured values as a reference only.
Actual wheel and tire dimensions may vary by manufacturer and model. Calculation results are for reference purposes only.
Always consult a qualified professional before making vehicle modifications.
The developer assumes no responsibility for any damages or issues resulting from the use of this application.

-Specifications
Wheel Offset Calculator
•Rim Width (in): 3" to 16" (supports 0.25" increments)
•Offset (mm): -60 to +70
•Backspacing (in): 3" to 13"

Speedometer Error Calculator
•Tire Width (mm): 125 to 405
•Aspect Ratio (%): 20 to 90, including 82 (R)
•Supports 82-series radial tires commonly used on vans and light trucks
•Rim Diameter (in): 10 to 32
•Direct Tire Diameter Input: 100 to 1500 mm or 4 to 60 in
•Vehicle Speedometer Error Correction (%): -20 to +20

Speedometer Error Measurement
•Measurable speed range: 10 to 200 km/h or 10 to 200 mph

Quoi de neuf dans la dernière version ?

Updated the app design
Bug fixes and performance improvements