Tire Plus Sizing & Speedometer Error Calculator
Calculate physical dimensions and speedometer deviations for your vehicle upgrades.
Current Tire
Width (mm)
Aspect Ratio (%)
Rim Diameter (in)
New Tire
Width (mm)
Aspect Ratio (%)
Rim Diameter (in)
Speedometer Error
0.00%
Safe Upgrade
New Diameter:
-
Old Diameter:
-
Difference:
-
Revs/Mile:
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Speedometer Difference Table
Speedo Reads
Actual Speed