COBRARACING

Only a massive load can cause that .Ive seen it before usually from thick mud on the drive train etc.shoes look like 6061 aluminum (soft)

fast11970

iTrader: (1)

Wow..I raced in alot of crappy conditions, never seen that before,

153stars

iTrader: (8)

I work in the aluminium pigment industry any metal with letters ium at the end can burn if ground fine enough also seen carbon packing burn, both burn without any flame so to speak. But do check your bearings , the casing wear caused by bad bearings is kiss of death.