whats my offset?

[x182dan]

I have an 18x8.5in rim. Its on the front of my car and I found out its bent so I need a new one but they make them in two different offsets and I cannot find anything on the back of the rim to tell me what offset it is. The two options are +13 and +38. Which one do I have?

 

[fixthedoor]

Measure your rims to find out. More than likely it's +13, but measure the offset on the rims to be sure.

 

[x182dan]

to measure it I go from the hub to the back of the wheel right?

 

[fixthedoor]

You described backspacing.

http://www.tirerack.com/wheels/tech/techpage.jsp?techid=101

Checkout link for visual and further explanation.

offset is the measurement from hub mounting surface to the centerline of rim.

 

[x182dan]

ok I found ET: 34 on the back of my rim does it make sense that I have a 34 offset? Basically to find the offset I go from the middle of the rim to hub mounting point of the wheel?

 

[fixthedoor]

If you are trying to replace (1) rim -
A. you took the wrong measurement
B. manufacturer changed offsets. It's highly unlikely the manufacturer changed specs.

According to your first post you only have (2) options +13mm or +38mm (about an inch difference).

It sounds like you have the right idea. Google "wheel offset" to find more pictures and info.

 

[x182dan]

it turned out my choices were not 13 and 38 but 13 and 34 the guy who emailed me the offset options typed in 38 by accident

 

[fixthedoor]

Coo :thumb:

is your offset +34 front and rear?

 

[x182dan]

my backs are +38, does all this seem about right? I probably could have left my quad shocks on but I couldn't even fit my pinky inbetween the tire and the quad shock. I am running 285/35/18 in the back

 

[fixthedoor]

Yeah that seems pretty tight. Recommended offset is +15mm to +25mm. I'm not sure what the recommended backspacing is. You can purchase wheel spacers to push the rims outward.