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*To*: caroth@holly.colostate.edu*Subject*: Re: SVO: wheel stuff*From*: "Gary Morrell" <gmorrell@ford.com>*Date*: Thu, 18 Dec 1997 14:10:45 -0700*In-reply-to*: "Chris Roth" <caroth@holly.colostate.edu> "Re: SVO: wheel stuff" (Dec 18, 13:10)*References*: Chris Roth <caroth@holly.colostate.edu> "Re: SVO: wheel stuff" (Dec 18 11:17) <199712182009.NAA45326@holly.ColoState.EDU>

On Dec 18, 13:10, Chris Roth wrote: > Subject: Re: SVO: wheel stuff > Gary, > > OK, I went home at lunch and measured the wheels without tires. The > wheel measures 8.0" exactly. So I will do the math: > > > > >3. Offset = (Overall Width - Backspace) / 2 > > (8.0 -5.75)/2 = 1.125" still not correct. > > >From you above formula you could never get a negative offset. I > think the formula used is the following: > > Offset=Back spacing - (Overall width/2) Yep, you're right, I spaced the formula. Serves me right for posting about anything math related prior to having any caffine. I'll post a correction to the list. > This would give you the 1.75" offset number, but this brings up > another question. I your first post you wrote > > > Offset: > > > > A wheel's offset is the distance from its hub mounting surface to > > the centerline of the wheel. If the hub mounting surface is outside > > the centerline, the offset is positive. If the hub mounting surface > > is inside the centerline, the offset is negative. > > Is this relative to the front of the wheel? If so then the above > modified formula will work. I am not trying to be a jerk, just > trying to understand the system. That's correct, its referenced to the front of the wheel. A positive offset is between the wheel's front face and the wheel centerline, negative offsets are inboard of the wheel centerline. Gary M.

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