Based on the legendary Flow EX, the new Flow EX3 series is characterized by the so-called "Tiebeam", a rim shape with a triple hollow chamber with a connecting brace. This internal reinforcement of the rim offers unprecedented impact resistance and retains air pressure better than any tubeless rim on the market.

The innovator in the tubeless sector can present the new Flow EX3 as a rim for winners: At the end of 2018, Martin Maes rode to victory at the Enduro World Series in Whistler and at the World Cup Downhill in La Bresse on a Flow EX3 rear wheel. In 2019, Flow EX3 rims and complete wheels will be seen on the GT Factory Racing Team bikes of Rachel, Gee and Dan Atherton, the Propain Factory Team and the Cannondale Factory Racing Team.

In extensive testing of Stan ́s rims and those of competitors, the 6069 aluminum construction has proven to be the biggest advantage of the successful Flow MK3, which is 10-15 percent stronger and more stable than the often used 6061 aluminum. The radially more compliant rim design and the 29 millimeter internal width were also tested as very good. More surprising was the stability of the classic Flow EX rim, whose triple hollow chamber design enables internal reinforcement of the rim. Although the rim is not made from the most durable aluminum and is rather narrow by today's standards, the rim was able to impress in the tests with amazing stability.

With the "Tiebeam" triple hollow chamber design, a significant increase in stability is achieved with only a slight increase in weight. The 27.5" Flow EX3 rim weighs 580 grams, the 29" rim weighs 618 grams.

Like every Stan ́s rim, the Flow EX3 can also be easily set up as tubeless. Thanks to the sophisticated "bead socket" technology, all you need is a floor pump. Optimized for 2.35" to 2.8" tires, the Flow EX3 is the evolution of the Flow line, geared towards the most aggressive riding. Every Downhill World Cup and Enduro World Series round, every hour of testing and improvement, has gone into the new Flow EX3.

And the complete wheel?

The new rim is of course also available as a Flow EX3 complete wheel. This is built around Stan ́s Neo OS front and rear wheel hub. The Neo OS front hub is characterized by larger bearings than the conventional Neo hub, but is compatible with both 20 mm and 15 mm forks. The Neo OS rear hub rolls on a steel axle. This guarantees better durability. The Neo OS comes with a freewheel with a reliable simultaneous 6-pawl ratchet system.

Stan ́s Flow EX3 complete wheel remains true to the tradition of using regular J-Bend spokes, which can be bought in any bike store in the world. The Sapim D-Light spokes used on the Flow EX3 keep the rotating mass to a minimum and are still exceptionally strong. The Sapim locking nipples have a mechanical lock to prevent the spokes from loosening.

Flow EX3 complete wheels are available for Shimano or SRAM XD cassettes, including 110 mm at the front and Boost 148 mm, 150 mm and Super Boost Plus 157 spacing at the rear. New in 2019 is the Neu OS front hub with wider flanges so that the bike can also be used with forks with wider 20x110 mm Boost brake rotor spacing.

Flow EX3 complete wheels are supplied with pre-installed rim tape for tubeless and Presta valves. The 15x110 mm OS front wheel also comes with an additional set of 20 mm OS Boost end caps.

Flow EX3 complete wheels are also available in individual configurations. Sticker colors and wheel configurations can be found on Stan ́s Custom Wheel Builder notubes.com/custom-wheelset