Challenge Valve Extender Alloy Size:41.5mm -2pcs+tool The intentional geometry of the

The intentional geometry of the kit preserves driveline angles while increasing ground clearance

it's designed to take a beating on the trails while keeping your front end protected where it counts

Rugged alloy body with steel internals—built to resist corrosion and provide reliable performance season after season

so you can get back to work without delay

well‑rounded choice

Challenge Valve Extender Alloy Size:41.5mm -2pcs+tool The intentional geometry of theSpecifications: Application: Gravel, Cyclocross, Road Valve Material: Aluminium Valve Type: SV (Sclaverand Presta) Valve Length: 31. 5 mm, 41. 5 mm, 55. 0 mm Valve Information SV Presta Valve: Synonyms: Sclaverand Valve (SV), French Valve, Presta Valve Outer Diameter: 6. 5 mm Other: all Challenge tubes with a Presta valve can be unscrewed (To lengthen the valve, add anti flat agents, etc.). Manufacturer Numbers: 31. 5 mm: 90020 41. 5 mm: 90021 55. 0