Your existing setup

Existing Tyre Width
Profile
Diameter
Existing Wheel Width
Offset
Measurement Guide
The Right
Numbers?

Your new setup

New Tyre Width
Profile
Diameter
New Wheel Width
Offset
Measurement Guide
The Right
Numbers?

WORK Wheels

Existing

New

Diameter 715.7mm 656.7mm
Circumference 2248.4mm 2063.1mm
Poke 56.6mm 61.6mm
Inset 146.6mm 141.6mm
Speedo error 0% 8.98%
Reading at 30mph 30mph 32.7mph
Reading at 60mph 60mph 65.39mph
Ride height gain 0mm -29.5mm
Arch gap loss 0mm -29.5mm

Popular 18" wheels

Compared to your existing wheel, this new wheel will have an inner rim which is 5mm further away from the suspension strut. The outer rim will poke out 5mm more than before.

Wheel Fitment Guide

The strut shown in the diagram is for show only. Don't worry if the wheel looks like it fouls!

Wheel Spacers and PCD Adapters
Will They Fit Measurement Guide