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I just bought a new bike today, and I took it out for a test ride and the brakes just make a super ugly and loud noise when I use them, my brother says I just have to break them in , but some of my friends say I have to get new brakes ? Anyone help

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    Three things: 1) To some extent you just need to break in the brakes. 2) The brake pads need to be "toed in". A new bike should have the pads toed in, but "should have" and "has" are different things. If you bought the bike from a respectable shop, take it back in a week or two (after a little "break in" for other components, in addition to the brakes) and get what should be a free adjustment service. 3) If the pads still squeak you can exchange the pads for ones of a different material. Some pads squeak more than others. – Daniel R Hicks Aug 8 '16 at 3:16
  • @Criggie - Read the title. – Daniel R Hicks Aug 8 '16 at 12:01
  • Check the alignment and hardness of the pads. Old pads get hard and brake poorly, when they've been sitting around for a few years. – Criggie♦ Aug 9 '16 at 2:48
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After greasing my chain, some grease got on the rim of my tire. It made a terrible noise while braking.

Sand grains that has gotten stuck in the brake pad can also cause screeching noises.

I recommend try to make sure there is no debris around the brakes. Also make sure the rim is very clean. Scrub it down to remove all oils, greases and debris.

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