offset comparison calculation

[24Dee]

I remember reading it and could have swore that I saved the thread and even wrote it down but I can't find anything...

I want to compare a couple wheel sizes and offsets(17x8.5 +25, 17x9.5 +30, a few others) to see how I could get the same or very similar look out of 17x9 wheels... anyone remeber the calculation for doing that? something like for every 1/2 in width you add/subtract a certain amount of mm from the offset being used as a comparison.....

sorry if this sounds confusing, hopefully someone will remember or know what the hell i'm talking about....

[Bushido]

http://www.1010tires.com/WheelOffsetCalculator.asp

[24Dee]

wasn't exactly what I was looking for but that made it much easier... thank you...

[KA24DESOneThree]

One inch is 25.4mm. Divide it by two (for inner and outer half) and you get 12.7mm. For every inch wider, subtract 12.7mm from the effective offset. For example: 17x8 +30 --> 17x9 +30 would be the equivalent of 17x8 +17.

Thus, 17x9.5 +30 would be roughly equivalent to 17x8.5 +17.

This all depends on wheel design.