Wheel Offset Guide, Unsure about proper offset? Look here first. Options

[WannabeGT4]

Ideal Offset in Relation to Wheel Width (standard ride height):
Width - Offset
7.0"-----30mm with 15mm spacer (effectively 15mm) *
7.5"-----31mm with 10mm spacer (effectively 21mm) *
8.0"-----33mm with 05mm spacer (effectively 28mm) *
8.5"-----35mm
9.0"-----42mm (probably too wide no matter what offset)

This will make the rim almost flush with the side of the body. These offsets and offset/spacer combos will prevent the "sucked in look" that the factory wheels have.

Ideal Offset in Relation to Wheel Width (lower ride height):
Width - Offset
7.0"-----36mm with 10mm spacer (effectively 26mm) *
7.5"-----33mm
8.0"-----40mm
8.5"-----46mm *
9.0"-----53mm (probably too wide no matter what offset)

The rim will sit just behind the fender. In order for the rims to tuck into the fender well on lowered cars the the rim must sit back into the wheel well by 11mm compared to the standard ride height offset recommendations.

* Clearance issues prevent the use of most rims with offsets lower than 30mm. The spacer will actually lower the offset and at the same time move the rim away from the offending components.
* 8.5" rims may or may not fit on lowered cars.

Offsets shown are positive.

Offset is measured from the wheels center line to the mounting surface.


This post has been edited by WannabeGT4: Jan 11, 2006 - 5:18 PM

[tovejas]

so basically the smaller the offset the closer the outter tire wall is to the fenders?

This post has been edited by tovejas: Jan 10, 2006 - 11:08 PM

[WannabeGT4]

so basically the smaller the offset the closer the outter tire wall is to the fenders?

Not exactly. Offset is relative to the wheel's width.
Larger offset means the mounting surface of the rim is further from the wheels center line. This will make the rim sit inside of the fender more, creating that "sucked in look."
Smaller offset means the mounting surface of the rim is closer to the wheels center line. This will make the rim sit closer to the fender but wheel width has to be taken into consideration.

This post has been edited by WannabeGT4: Jan 11, 2006 - 5:23 PM