Noisy brake whilst braking

How do I know I have this issue?

New bikes: You will hear a grinding/squealing noise on the brakes in your first few rides. This will often happen on new bikes with hydraulic disk brakes, which will always need their brakes "bedding in" to remove this noise.

Older bikes: Your brake pads are rubbing against the disk, creating a squeaking or grinding friction noise and/or resistance while the wheel spins.

What causes this issue?

New bikes: New bikes with hydraulic disc brakes always need brakes "bedded in". This process will transfer material from the brake pads onto the brake rotors to ensure that you have proper stopping power

For older bikes: While braking, vibrations get transferred along the brake disc, which vibrates at an audible frequency and can create noise. This vibration can be linked to multiple reasons. The most common is that impurities on the brake disc and/or pads (e.g. water or dirt). Disc brakes are typically louder when the road is wet, and will become quieter as they dry out.

Repair Instructions

If your bike is new: New brakes need to be "bedded-in". During this process, the brake pad material is distributed evenly over the brake discs and the noise disappears.

• Step 1: Check the brake discs for dirt: Noise from dirt often happens to bikes with hydraulic disk brakes. To solve this, simply clean the disks with a cloth, dry or with some alcohol - be careful, NO SOAP.
• Step 2: Check if if the issue is caused by a bent brake disc. Flip the bike over and spin the wheel, and check if the brake disc is 'wobbling'. If yes try first to straighten the brake disc - you can follow the step by step solution provided on this article.
• Step 3: If the issue is caused by a misaligned caliper. To calibrate the calipers: follow the following video starting from 2:54

If you need further assistance then please raise a ticket with DASH Support