Change brake discs

When or why do I change the brake disc? 

• Damage, e.g. due to a fall
• optical, functional reasons 
• Wear limit has been reached (worn out or contaminated by oil) 

Note: The wear limit is noted on each brake disc (manufacturer information) and can be measured with a sliding caliper. 


How do I change the brake discs? 

First, it is important to know whether it is a 6hole hub or a centerlock hub. The brake disc depends on the hub.
With the 6-hole hub, the disc is attached with six small screws. In the centerlock hub, the disc is mounted by means of a circlip, which is tightened with the same tool that is needed for the cassette or bottom bracket.

For this, of course, you need the appropriate tool. Basically, the assembly of a centerlock disc is somewhat easier or faster. 



Changing the brake disc with 6 hole system 

• Wheel dismantle and lay down, possibly two wooden wedges underlay, so that the wheel does not wobble and lies more stable. 
• Use a 25mm Torx wrench to open the screws. Unscrew the screws diagonally crosswise and remove them. 
• Change the brake disc. Pay attention to the specified installation direction according to the manufacturer. 
• Use the torque wrench to tighten the screws again diagonally with 2-4 Newton meters. 

Changing the brake disc with Centerlock system 

• Remove the wheel and place the wheel in front of you. 
• Open the locking ring with the appropriate tool. 
• The serration allows easy insertion of the new brake disc. 
• Set the torque wrench to 40 Newton meters and close the ring. 

Note: If there was oil on the brake disc, it is necessary to change the brake pads as well!