Hi I have recently noticed  that both brake callipers have moment in them. It's not where the bracket is but where the actual calliper sits. The whole calliper has Tiny amount of movement in it. It almost seems like it is meant to move because it has tiny spongy plastic gator on the brake calliper mount, just wanted to make sure tho. So if someone could advise me that would be a great help as I aM worried that it will brake it if I continue to ride it 

many thanks 

dtstrider

 

They are sliding pins. If it didn't move your brakes would not work as efficiently.