nope, steel frame. Torker Boardwalk. I suppose I could weld it up, but would I ever totally trust it? It is an excuse to zap, and I cant break it any worse I guess. Really, I had no idea this was cracked. And maybe its not all the way around yet and thats why. I assume this kind of thing would have been devastating to my skin at speed. Maybe my crappy engine failure saved my butt.That an Aluminum Bike?