Offset calculator?

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Offset calculator?

Postby tbdomenz » Thu Nov 11, 2010 4:00 pm

Anyone know a web site with a good offset calculator? The one I found is confusing :(
MORE offset cause the tire center lines to create a wider or narrower track ?
Tom in 60193
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Re: Offset calculator?

Postby Brian » Thu Nov 11, 2010 4:36 pm

IF you have 50mm offset wheels then 40mm offset is pushing the wheels OUT by 10mm.....and doing that on both sides of the car means you widen the track by 20mm. There are 25.4 mm per inch.
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Re: Offset calculator?

Postby tbdomenz » Thu Nov 11, 2010 4:56 pm

So, positive offset is from wheel hub mounting face IN toward the centerline of the car.
I needed to hear that from a reputable source because the online info I have seen just didn't quite make it "crystal clear". Thanks for that simplified explanation!
Tom in 60193
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Re: Offset calculator?

Postby Oz » Thu Nov 11, 2010 7:04 pm

Easy way to remember,
"Smaller number, bigger track"
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Re: Offset calculator?

Postby slartibartfast » Thu Nov 11, 2010 8:09 pm

Imagine your wheels with rubber spokes. As you push the barrel/tire towards the center of the car, offset increases. As you pull the barrel/tire out, the offset decreases. Keep pulling, as the centerline of the barrel passes outside the plane of the mounting face of the wheel, offset goes negative. Deep-dish wheels have low to negative offset.
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Re: Offset calculator?

Postby tbdomenz » Fri Nov 12, 2010 6:40 am

Got it ! Thanks all.
Tom in 60193
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Re: Offset calculator?

Postby spigot52 » Fri Nov 12, 2010 4:02 pm

'07 RX8/'06 MX5
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