Re: Offset: + or -- ?

[Godfrey DiGiorgi <ramarren@domain.elided>]

The Tire Rack page is what raised the question in the first place. Dave
Partridge pointed out to me that the measurement described by Tire Rack is
actually hub offset, not wheel offset ... it's a matter of point of
reference. A negative hub offset produces a positive wheel offset. Thus my
confusion. 

I agree that it's often difficult to measure this stuff. I've found in the
past, on the rare occasions when I was in need of a particular offset or
change, what I did was measure the thickness of the rim from a surface
plate to the bead seat area adjacent, from that to the opposite bead seat,
and from the surface plate to the hub mounting flange. These three
measurements give you the reference basis needed on the original wheels.
Then you can determine by measuring the same three things on a set of
candidate replacement wheels exactly what the differences are. 

Thanks to all who have offered comment on this question!

Godfrey

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