Originally Posted by Fibonachu
Did the weld just have basically no penetration most of the way around?
It didn't break at a weld. That part of the wheel is one piece stamped. The small weld spots you see are the "nubs" for the hub cap to snap over.

Speaking of hub caps, a neighbor just called. He found my hub cap about 3/10 of a mile from the cattle guard.

Originally Posted by Fibonachu
Or was it rubbing on the caliper and wore through?
I hadn't considered that. I'll look for wear marks on the back of the wheel and the caliper.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.