The only mention of piranha hubs were on this site. Couldn’t find any other referencesI do remember Piranha racing but not the history of them now. These little Offroad masters are nice. I built one for my son years ago. Wish I had a picture of it but it was really tricked out with a disk drive, and lots of 3DV, Ringle stem, Topline cranks etc etc... Sadly I broke it for parts long ago.
But the bike frame is similar to a large Bmx (sort of like a prehistoric dirt jumper)