Review on 🚲 MBP Alloy Tubeless 40mm Bicycle Presta Valve Stems: Fits Most Rims, 2 Types of Grommets Included! by Predrag Hall

These tubeless valve stems are very good. They feature the tool-free manual installation of Presta valves into the stem itself. This can also be done with an adjustable wrench as Presta valves have two sides that are intentionally flattened to allow a wrench to grip them. They come with two different rubber grommets that fit the wheel which was nice. The valve covers are also aluminum and have rubber inserts for easy removal and installation when adding or removing air. Overall this is a quality pair of valve stems that do not leak and work well.