The CBD timing belt drive system stands out because of its low belt pre-tension and easy handling; however, even these characteristics cannot fully exclude the possibility of wear and tear relating to age and intensity of use.
- Check the timing belt and the sprockets for defects before every use. Using a worn-out or damaged component can result in injury or damage to the CBD.
- If you notice any wear and tear on the timing belt and/or sprockets, find a bicycle retailer who can check the condition of the timing belt drive system and replace the worn parts if necessary.
- The following overview gives specific examples of wear and tear and the corresponding actions to take.
In the table below that, you will find a list of possible types of wear and tear on the CBD and the corresponding maintenance work to be carried out.
| Possible type of wear and tear |
Replace sprockets (both) |
Replace timing belt |
| The sprocket on the front and/or rear sprocket is bent out of shape. |
x |
x |
| The front and/or rear sprocket is bent out of shape. |
x |
x |
| The tooth profile of the front and/or rear sprocket is visibly damaged (asymmetrical). |
x |
x |
| The rear sprocket wobbles on the hub; the fit has come out/is spinning. |
x |
x |
| The front/rear sprocket is shorn off. |
x |
x |
| The sprocket on the front and/or rear sprocket has sharp edges. |
x |
x |
| The timing belt is kinked/bent out of shape. |
x |
x |
| The tooth profile of the timing belt is visibly damaged. |
x |
x |
| The timing belt exhibits tears or porous spots. |
x |
x |
| The timing belt is frayed. |
x |
x |
| The timing belt is torn. |
x |
x |