Technical brakes question

[NowIsGone1106]

Hello,

I just changed the front pads today as they were really low. mot is tuesday *crosses fingers*. my question is, the pads i removed were 2-3ml lower 1cm in width all across the outer edge on the friction material. i dont know if that makes sense, basically they were worn more on the outer bit. as a consequence the disk had a lip that must have worn the pad this way. it was only on the inner pad, but it was the same both sides.

what would cause this?

 

[NumanR]

corrosion, sounds like you should have replaced discs as well.

 

[NowIsGone1106]

it was standing for a while before i brought it come to think about it... I didnt know the disks were like this with it being on the reverse side. Nobody had the disks in stock today, and what with my mot tuesday i just ground off the lip on the disks and fitted the new pads.