14" SBP Factory Rims

Okay, I got 4 sbp 14" rims today for $10. They are marked M5, two also have a J stamped into them, and two have a V. They are 5" between the rim beads, hence the M5 I guess?

Did they make these in 5"?

I have heard of J rims, but not V rims, if there is such a thing.

Here's a diagram explaining rim width and centerline measurements...

RimWidthCtrLineMeasurement.jpg