 
For assembly and operation, the tyre-protection chains require a certain minimal distance between the tyre and the frame of the machine.
| dimension | a mm | b mm | 
| 11 | 50 | 70 | 
| 14 | 60 | 80 | 
| 16 | 60 | 90 | 
| 18 | 70 | 100 |