Valve extension Optimize your cycling performance with the Birzman valve extension, perfect for Presta valves and non-removable cores.
BIRZMAN CNC-machined aluminum valve extensions are designed exclusively for Presta valves with non-removable shells.
| Brand | Birzman |
| Supplier reference | BM-TOO-0027-80 |
| Color | black |
| Color | Black |