The BSL depends on the boot series. For the 2016/2017, we have the X Series, and the M Series (the Series is the first letter of the model name).
|
XP & HP Series Three strap design |
|
|---|---|
| Size | BSL |
| 23 | 281mm |
| 24 | 291mm |
| 25 | 301mm |
| 26 | 311mm |
| 27 | 321mm |
| 28 | 331mm |
| 29 | 341mm |
| 30 | 351mm |
| 31 | 361mm |
|
M Series Two strap design |
|
|---|---|
| Size | BSL |
| 23 | 291mm |
| 24 | 301mm |
| 25 | 311mm |
| 26 | 321mm |
| 27 | 331mm |
| 28 | 341mm |
| 29 | 351mm |
| 30 | 361mm |
| 31 | 371mm |
