What fits best, Weights & Sizes
User avatar
By teal_dx
#341698 Offset is the distance (in millimeters) from the center of the width of a wheel, to the surface of where the face of the wheel mounts to the hub.

Here's a link with a detailed explanation:
http://www.worldoneperformance.com/blog ... sets-work/
User avatar
By mADmAN
#341706 to put it simply...

it basically dictates how far in ur wheels sit... or how far they stick out.

typically the higher the number, the more inwards into the fender it goes

the lower the number, the more it will stick out of the fender.