The UK quattro Network

Tyre Size Calculations

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If you don't yet own one, beg, borrow, buy or steal a metal detector. And sweep your drive with it. 215s are precious.

ET stands for "Einpreßtiefe" - "pressed in depth".

See for a calculator

Fill in the calculator frame:

Altes Felgenbreite in Zoll = width of old rims in inches
Vorhandene Spurplatte in mm = current spacer in mm
Alte ET = old ET (also mm)
Neue Felgenbreite = width of new rims (in inches)

Click on "berechnen" and enjoy.

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