My bicycle is making a grinding noise when I pedal. What could it be and how can it be fixed? - Quora
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![New bike: drivetrain noise isn't smooth and chain catches in reverse. It also makes the same sound when pedaling forward but the chain doesn't catch. Is there something wrong with the rear New bike: drivetrain noise isn't smooth and chain catches in reverse. It also makes the same sound when pedaling forward but the chain doesn't catch. Is there something wrong with the rear](https://external-preview.redd.it/NRtIeCqjzs9agexbVixsdiNcTjp9BR8tBz3HMDVunhE.png?format=pjpg&auto=webp&s=c15d3b7de406c4e08ff1da52f0f1c333113da782)
New bike: drivetrain noise isn't smooth and chain catches in reverse. It also makes the same sound when pedaling forward but the chain doesn't catch. Is there something wrong with the rear
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![Bike makes knocking noise only when pedaling. The cassette cogs have some grooves on them. Is this normal or the cassette is defective? : r/bikewrench Bike makes knocking noise only when pedaling. The cassette cogs have some grooves on them. Is this normal or the cassette is defective? : r/bikewrench](https://preview.redd.it/kzrb6cvyqmc51.jpg?auto=webp&s=1bcfd60e1b4edb4e0f8fe9d3eb05b71555b3a547)
Bike makes knocking noise only when pedaling. The cassette cogs have some grooves on them. Is this normal or the cassette is defective? : r/bikewrench
![Loud click/creak noise whenever I pedal hard on my right crank. Any ideas of what it could be, or anyone have a similar problem? Input appreciated. : r/bikewrench Loud click/creak noise whenever I pedal hard on my right crank. Any ideas of what it could be, or anyone have a similar problem? Input appreciated. : r/bikewrench](https://preview.redd.it/vogm69525bu51.jpg?auto=webp&s=f781a949321968253cafb0228f48caa6c3796711)