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Discussion Starter · #1 ·
Quick question - I think I know the answer, but I wanna make sure. The higher the offset means it sticks out further correct? So +15mm offset will set in the wheel well more than a +18mm offset.

A confirmation would be nice.

Thanks
 

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mikew2069 said:
Quick question - I think I know the answer, but I wanna make sure. The higher the offset means it sticks out further correct? So +15mm offset will set in the wheel well more than a +18mm offset.

A confirmation would be nice.

Thanks
A positive offset means the the wheel, when bolted to the car, is more INSIDE the fender. A negative offset means the wheel sticks more OUTSIDE the fender. (And depending on spoke design, a negative offset wheel tends to have more of a lip on the rim.)

Offset is how far the hub mounting surface is from the middle of the wheel.
A Zero offset would mean, for example that the hub mounting surface is exactly in the middle of the width of the rim.

A +25.5 offset (25.5 mm = 1 inch, BTW) means the hub mounting surface is 1 inch towards the OUTSIDE of the rim. Try to visualize putting a wheel like this on a car. It means more of the wheel is under the fender. The opposite holds true for negative offsets.

Hopefully this helps more than confuses. It took me a while to get the hang of it.
 

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Discussion Starter · #3 ·
So then I have it backwards? The +18mm offset should sit a tad more inside the wheel well than the +15mm offset?
 

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mikew2069 said:
So then I have it backwards? The +18mm offset should sit a tad more inside the wheel well than the +15mm offset?
Yes you had it backwards. the +18mm will be more inside the wheel well than the +15mm one.
 

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Discussion Starter · #7 ·
trendkill said:
so on our 300's is it beter to have a +15? what looks beter?
I would say +18mm looks better. I have seen 300s rolling around on 22s that look completely goofy and I think it's because of the offset. It is your personal preference, but I want my wheels as flush as possible.
 
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