I was washing my 4066R, and when cleaning the front right rim I noticed the sponge got stuck and tore. I then saw this, my finger nail grabs it pretty hard. I assume its the the seam when they welded the rim... but none of the other wheels have that seem and it seems a bit obnoxious. Would you be concerned? Ive had it just about 1year, Ive washed it a few times but never noticed it before. Thoughts?