(deadhorse
After looking at lots of new and used wheels online and realizing how clueless that left me, I finally got around to making a measurement of my own, using materials from my own stash of junk. After removing the tire from an old Crown Victoria steel wheel (15x7ish, zero offset), I found that it would not quite bolt down on the MZ5 front hub (sat maybe 1/8" proud of the mounting surface), but it bolted down nicely with a 7/16" wheel spacer I happened to have. Since the wheel was greasy, it was easy to identify the areas where it scraped the brake caliper (see pic).
The smaller ID area of the wheel, where the welded center attaches, is about 13". (measuring with a tape measure - a big digital caliper would of course be better)
The ID at the bead seat is a little over 14.5" (as one would expect).
In between, the ID is maybe 14.25". This would seem to be the area that cleared the brakes with the 7/16" wheel spacer in place.
Measuring from a straightedge laid across the wheel lip, the scraped area is about 1/2" inboard of the wheel mounting surface (4" backspace, 3.5" to scraped area).
One thing I have not done is to measure with a straightedge how far inboard the corner of the caliper is from the actual hub flange, but this is at least more info than I had before!
(dunno)
After looking at lots of new and used wheels online and realizing how clueless that left me, I finally got around to making a measurement of my own, using materials from my own stash of junk. After removing the tire from an old Crown Victoria steel wheel (15x7ish, zero offset), I found that it would not quite bolt down on the MZ5 front hub (sat maybe 1/8" proud of the mounting surface), but it bolted down nicely with a 7/16" wheel spacer I happened to have. Since the wheel was greasy, it was easy to identify the areas where it scraped the brake caliper (see pic).
The smaller ID area of the wheel, where the welded center attaches, is about 13". (measuring with a tape measure - a big digital caliper would of course be better)
The ID at the bead seat is a little over 14.5" (as one would expect).
In between, the ID is maybe 14.25". This would seem to be the area that cleared the brakes with the 7/16" wheel spacer in place.
Measuring from a straightedge laid across the wheel lip, the scraped area is about 1/2" inboard of the wheel mounting surface (4" backspace, 3.5" to scraped area).
One thing I have not done is to measure with a straightedge how far inboard the corner of the caliper is from the actual hub flange, but this is at least more info than I had before!
(dunno)