Problem Solvers Presta Valve Extender - Removable Core | 70mm | Black Watches and triathlon bikes use seatpost

and triathlon bikes use seatpost shapes that simply will not accept a round-clamp Varia mount

engineered for riders who want fast rolling

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The result is a multiple award-winning design that is as much about aesthetics as acoustics

The stripped-down design means less weight on your back and less aerodynamic drag when you are chasing the clock

Problem Solvers Presta Valve Extender - Removable Core | 70mm | Black Watches and triathlon bikes use seatpostWhat Makes the Problem Solvers Valve Extender Worth It? The Problem Solvers Presta Valve Extender for Removable Cores is the clean, reliable solution for running deep section rims with standard length valves. Unlike basic extenders that thread onto an intact valve, this design requires a removable valve core, letting you spin off the core, thread on the extender, and reinstall the core through the extender for a secure, airtight connection. The