Odd track wear

[Creeksider]

Has anybody experienced this odd wear on their track? I can't seem to see where it may be rubbing or if this normal from the manufacturer. Pictured is on the side.

Any ideas? 2010 Phazer with 4400 Kms s??

 

[Cubby]

I had it on my track too. I believe its just normal wear.

 

[canoehead]

It's caused from ice build up in the tunnel and the track rubbing it. I just use a propane torch and clean it up.