Wheel Offset Calculator

Wheel Offset Calculator Version v1.1

To use the Wheel Offset Calculator Enter the following data -

Current Wheel Width - Your current wheel width
Current Wheel Offset - Your current wheel offset
New Wheel Width - Your new wheel width
New Wheel Offset - Your new wheel offset

Note that often front wheel and rear wheel offsets are different. And wheel offset is generally expressed in Millimeters. You can hit the SAMPLE button to see how some typical calculations will look. RESET will clear out the form and the CALCULATE button will do the work. If you find any problems let me know!

Here's how to interpret the results:

If the 'Suspension Side Change' field is a NEGATIVE value then the new rim offset has moved the edge of the rim towards the suspension. If a POSITIVE value then the new sized rim edge has moved away from the suspension.
If the 'Fender Side Change' field is a NEGATIVE value then the new rim offset has moved the edge away from the edge of the fender (towards the inside). If a POSITIVE value then the new sized rim edge has moved towards the inside of the fender.
If either field returns zero then no change as you might have imagined.

Wheel Size Offset Calculator
Current Wheel Width
Current Wheel Offset (mm)
New Wheel Width
New Wheel Offset (mm)
Wheel Edge Movement Changes
Suspension Side Change	Inches mm
Fender Side Change	Inches mm

Another simple tool from www.gtsparkplugs.com