Originally Posted by alyske

Since around Christmas Eve, my bike has been making this weird scraping sound when I brake, and my bike brakes very suddenly, as if I pounded on the brakes every time I stop. I don't hear anything when I am peddling, only when I am braking. I have put some oil on the chain and it is still doing the same thing. I was wondering if anyone here could help me out before I take it to a shop?

All help is appreciated!