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If your disc brakes are making a grinding noise, the pistons are most likely not coming out as they should because they are dirty. Here's how to fix it. Degreaser: https://amzn.to/3Vf3b9r Brake spreader: https://amzn.to/4gbTTTT ---------------------------------------------------------------- ►►Download the itinerary app! ???? Android: https://bit.ly/3RFoakU ???? iOS: https://apple.co/48E3Lmi ???? Website: https://training.camp/ ---------------------------------------------------------------- In collaboration with Bike Lab Torino: / bikelabtorino ► Support the channel with a subscription: https://mtbm.ag/abbonamento ► Technical questions? Ask in our community: https://community.mtb-mag.com/