For those of you sitting on the edge of your seat, waiting to find out....did the repair work? Is Rads wheel clean? Did Mobil1 destroy the quality seal Mammy Yammi installed? Is Rad really Johnny Wa.....ahem. No leaks. In fact, the seal was probably bad all along, just never as obvious as it had become. Franks back wheel had always had a predilection for accumulating crud-as my first shaftie, I was not concerned as my chainers had always been much worse. Well, the back wheel is still spotless, much cleaner after several hundred miles than it ever has been, including when brand spanking new. I can only surmise the seal had been dribbling ever so lightly all along, the erosion I found may have been a defective o-ring, or a dry install had chewed it up enough to cause micro-tears, not unheard of in o-ring installs-hence warnings to always lube seals liberally when installing. I had thought there was another possibility-and so checked to see that yes, indeed, there was lube in there to leak out if it was gonna. No Beemer Burns for this clown. End of report.