Stan's NoTubes

Stan's No Tubes Flow EX3 Rim

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This rim is built to let you do more. The Flow EX3 is Stan's most robust tubeless rim made for handling faster speeds on the most demanding trails. Durability starts with design, and Stan's patented Bead Socket Technology ensures easy inflation and the most reliable airtight seal, proven time and again on enduro and World Cup DH courses around the world. Bead blasted 6069 aluminum construction and Stan's Tiebeam triple cavity design make the Flow EX3 the ultimate rim for enduro and DH racing and a great choice for the added weight and forces of eBikes, or anyone looking for the most durable tubeless rim.

 The Flow EX3 rim’s Tiebeam inner bridge lets it withstand impacts that would deform most rims to the point of air loss and structural failure. Even if you use a tire insert, huge impacts can cause the sidewall of most rims to fold, causing air loss and eventual failure. The Tiebeam brace and patented low walls of the Flow EX3 resist this folding, maintaining air pressure and structural integrity better than any other rim. Combined with the added durability of 6069 aluminum and 29mm inner width optimized for 2.3" to 2.6" tires, the Flow EX3 is the evolution of the Flow line for the most aggressive riding.

This rim is fully tubeless compatible when used with Stan's Tubeless Rim Tape and a Wheelbuilder Tubeless Valve Stem

Checkout our Custom Stan's MTB wheel page to configure your personalized set of Stan's wheels.

Rim Specifications:

  • Size:  27.5", 29er 
  • Weight: 580g (27.5") / 618g (29") 
  • Hole count: 32H
  • Internal/External width: 29mm/32.6mm
  • Tubeless compatible
  • Rim depth: 17.9mm
  • Valve: 35mm presta
  • Rim material: 6069 Aluminum
  • Color: black
  • ERD: 564mm (27.5") / 602mm (29")
  • Max pressure: 2.3" tire = 39psi, 2.6" tire = 34psi
Stans MTB Rim Compairson
Rim Description Material  Rim Width Internal/External Rim Profile Height Hole Count Weight (Size) Tire Size Range Application
Crest MK4 Aluminum  25mm / 28.4mm  18mm  28H, 32H  357g (26") / 374g (27.5") / 399g (29") 40mm - 2.3" Cross Country, Gravel
Arch MK4 Aluminum 28mm / 31.4mm 18.9mm 28H, 32H 431g (26”) / 451g (27.5") / 481g (29") 2.2" - 2.5" Cross Country, Trail
Flow EX3 Aluminum  29mm / 32.6mm  17.9mm  32H  580g (27.5") / 618g (29") 2.3' - 2.6" Enduro, DH-Freeride
Flow MK4 Aluminum  30mm / 33.6mm 18.9mm  32H  466g (26") / 487g (27.5") / 521g (29") 2.3" - 2.6" Trail, Enduro, DH-Freeride

Inventory Note:
We stock a variety of Stan's rims, however our inventory fluctuates daily. We may need to order rims with an average lead time of 7-10 business days. If your order is time sensitive we encourage you to contact us for up to the minute product availability and shipping lead times.

Weight: 326g (26"); 341g (27.5"); 364g (29er)

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