30mm v 15mm offset

[MiRunner]

What is the difference in the two offsets, plain english please.

I know the stocks are 30mm but I'm possibly changing to a 20' with 15mm

Thanks.

 

[galactic_04]

Maybe it'll make sense with an illustration... it'll sit 15mmm out farther from the truck:

 

[rook]

What is the difference in the two offsets, plain english please.

I know the stocks are 30mm but I'm possibly changing to a 20' with 15mm

Thanks.

Galactic's example is accurate, provided you have wheels that are the same width.

Offset just measures the distance the hub mounting surface is from the center of the wheel. The lower the offset number, the further out the wheel will be from the truck.

Most aftermarket 20" wheels are 9-10" wide. Unless you are considering 5th gen wheels, they may be 7.5" wide.

 

[MiRunner]

Hey,

Considering 5th gen which are 20x7

 

[Conspearasea]

Wheel / tire size calculator / comparer - RIMSnTIRES.com

Heres a good comparison tool if you have specs for both...It even lets you put your tire size into the equation so you have a really good idea what you will wind up with.

 

[rook]

Hey,

Considering 5th gen which are 20x7

The net effect will thus be zero.

You will have 15mm offset but a wheel that is 13mm narrower. The "stance" of the truck will not change by much.