black dust

[gmorry]

I have notice black dust on inside of driver front wheek on alloy

what could be causingnit 

[insanitybeard]

Are you sure it isn't just the normal brake dust from the front brake pads? Perfectly normal if so, unless there's loads of it on one particular wheel which could indicate a caliper starting to seize or seized. Does the wheel turn freely without binding if you get it off the ground?

[gmorry]

Thanks for reply had car in for mot and they said wheel calibre was binding will try  what you said tomorrow and let you know outcome if it is binding can I take it back to garage to get fixed

[insanitybeard]

Sometimes a partially seized caliper can be freed off by removing the caliper from it's mounting bracket and pumping the piston out a little way and then attempting to ease it back in a few times but if it's too far gone it'll need a new caliper.

[Chrispb]

Also check the sliding pins haven't seized,  this is usually the case if both pads have worn on one end