Review on 🚲 Set of 4 Tubeless Valve Stem Core Copper Presta Universal with Blue Metal and Black Plastic - Ideal for Bike Bicycle Road Racing - Includes Coloured Valve Cap Dust Covers by Chris Durandis

Excellent stems for converting to tubeless or replacing thicker tubeless stems. I've tried a few other more expensive stems and these are the tightest and work best. The rubber sealing mechanism at the base of other stems can often be unreliable and tend to constrict as the stem is tightened to the rim. This restricts airflow and can affect tire bead installation. The rubber at the base is quite firm and holds its shape, very happy with them. Easily replaced 5 year old curved stems from a set of Stans ZTR Arch wheels and rebuilt my friend's WTB wheelset. Best value for money, really good that it's a 4 pack