Our Presta Valve Extender Wrench combines a 4mm closed end for removable valve cores with a 5mm open end to install inline Challenge Presta Valve Extenders. The lightweight wrench is black anodized aluminum for durability and a precise fit.

Wrench to tighten/loosen Challenge Valve Extenders
Valve: Presta

Part Type: Tools
Size: 4/5mm