Tubeless Valve Stem Flow Test - High Flow Presta VS Jones Schrader

Описание: Air flow test:    • Tubeless Valve Stem Tire Inflation Speed, ...  
We flow-tested ten tubeless valve stems, including Presta, Schrader, and high-flow stems to see the differences and to find the stem with the most flow because tubeless valve stems with a higher flow rate make mounting tires tubeless easier.

In the late 1890s Presta valve stems were developed with a smaller diameter. This allowed for the drilling of smaller holes in the narrow wooden rims of the time, leaving more wood behind to reduce the risk of cracking.

Now, with wider, aluminum, and carbon fiber rims, the small Presta size is not needed.

Schrader valve stems were designed for bikes around the same time as Presta.

Jones Schrader tubeless valve stems have a larger inside diameter which gives them more flow than high-flow Presta valve stems and other Schrader stems. It's also lighter than many Presta valve stems.

Jones Spec. Schrader Valve Stem description (pair): https://jonesbikes.com/jones-spec-sch...
Schrader valves are stiffer, sturdier, and easier to use than presta valves. They have a larger diameter than Presta valves, allowing for increased airflow, and making setting up tubeless tires much easier. The 36.5 mm long valve stems work perfectly with Jones aluminum and carbon rims and wheelsets. They also fit many other rims as well. The aluminum base of the stem is smooth, rounded, and lower profile which makes installing tires easier without catching the tire bead on the stem. The large inside diameter features a beveled, all-metal opening for faster/higher volume airflow and no clogging. The large valve stem ring nut has more surface area for your fingers making it easier to turn. It also has an o-ring to keep it tight. The valve cores are removable and replaceable. Sealed aluminum valve caps top everything off and even come with their own integrated tools. One cap is a valve core removal tool and the other is for bleeding air.

Jones Aluminum Schrader valve stems with caps.
-Removable, replaceable, valve cores.
-Sealed aluminum valve caps with integrated tools for valve core removal and easy air bleeding.
-Larger inside diameter for fast and easy tubeless set-up.
-Stiffer, sturdier, and easier to use than Presta valves.
-A lower profile base makes installing tires easier without catching the tire bead on the stem.
-Beveled aluminum base for faster/higher volume airflow with no clogs.
-Large stem ring nut with good grip.
-Replacement valve cores and caps are available.
-Fits an 8 mm rim hole.
-Length: 36.5 mm
-Weight: 24 g (pair)

Jones Bikes has switched from Presta to Schrader on all bikes and wheels!
After comparing and testing Presta and Schrader valve stems, it makes sense to change from Presta to Schrader.

SWB
LWB
LWB HD/e
LWB HD/e e-bike
Jones 56mm carbon C-Rims
Jones Spec., 50mm wide aluminum rims
Jones wheelsets

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