![]() ![]() Why? Well, to accommodate the wider stem, the 76 Projects Valve is actually composed of seven individual parts, as opposed to the four parts that comprise the regular Presta Valve.Īs you can see in the following image, and in the installation video provided by 76 Projects, a base nut that sits inside the rim seals the valve from underneath, working in concert with the external lock nut that tightens the whole assembly from the outside. With its larger external diameter, installation requires a few more steps than you’ll be accustomed to. Right a cross-section of the 76 Projects Hi Flow No Clog Valve, next to the cores of a Presta and Schrader Valve. Left the threaded portion of the valve is wider than the narrower non-threaded (externally) portion that passes through the rim hole – the two thread together just underneath the rim hole. In the event that the valve does clog, the core can be removed for a thorough clean. ![]() Thus, the valve is said to be compatible with sealant injection systems like Stan’s The Injector. We don’t have exact measurements to share, but it’s clear from the following image that the hollow region within the valve core is fairly voluminous. The higher volume design of the valve is responsible for it’s “No Clog” tagline. Functionally, this presents a notable difference to the design of the Reserve Fillmore Valve, which seals at the very bottom of the valve stem, a feature that will likely make its use with certain tight fitting tire inserts such as CushCore a little problematic. It is at the bottom of this wider area where the valve core seal sits screwing down the valve core pushes its seal down against the region where the lumen begins to narrow again. Here, the external diameter increases to allow the internal diameter to increase. It is the volume of the valve core that is responsible for the massive increase in air flow.Ī key part of the design is that wider region near the top of the valve. Like the Presta Valve, the 76 Projects offering runs a removable valve core, but key to this design is the fact that this one is hollow air and sealant go through the hollow core before passing into the lumen of the valve stem and finally into the tire. So, how does the 76 Projects Hi Flow No Clog Tubeless Valve circumnavigate these issues? My riding pal at the time also made use of them shortly afterwards for the very same reason. Secondly, there’s the Presta Valve’s tendency to clog up with sealant… only last week I had to use pliers to unscrew a Presta Valve clogged up with Slicy Banana Smoothy. As the rate of airflow permitted through the Presta Valve isn’t all that high, you’ll often find you need to remove the valve core to inflate the tire in a rapid enough fashion that the beads will seat. The first of those issues is encountered when seating the tire on the rim. With the almost ubiquitous uptake of tubeless systems, particularly in mountain biking, shortcomings of the traditional Presta design have been highlighted. The Presta Valve has been serving riders of all kinds of bicycles very well for many, many years (probably since before you were born). Play 76 Projects Hi Flow No Clog Tubeless Valve The 76 Projects Hi Flow No Clog Tubeless Valves are composed of a high precision CNC machined aluminium body with a stainless steel hollow core a pair weighs a claimed 9g. ![]()
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