E.T. is a euro measurement which only does you any good if you know the width of the wheel.  Americans use backspace which is 1/2 the actual wheel width plus the amount of offset. Or you can measure it directly with a tape-measure and a straight-edge measuring between the wheels mounting surface and the inside edge of the wheel.

America also was the largest producer of tires for a long time so their sizing method stuck.

Good luck

Tim

JordanVw@AOL.COM wrote:
here is stupid question i always wondered about.. why is wheel diameter and
width always in inches, but the offset is in Millimeters? just always
wondered why..

anyone know?

chris

TJ Hannink
Goldibox - 1987 Vanagon Camper, Wolfsburg Edition
1981 Bluebird Wanderlodge, FC-33
Winter Park, Florida
http://home.earthlink.net/~tjhannink/
http://groups.yahoo.com/group/wolfsburg_campers
http://groups.yahoo.com/group/wanderlodge
FAVOR website:  http://home.earthlink.net/~clubvanagon

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