Flow EX Wheelset

Flow EX Wheelset

Photo Credit: Fraser Britton - Rider: Brook Macdonald
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  • For enduro, trail, and all mountain use

  • Bead Socket Technology (BST) for superior tubeless performance

  • Rim width: 29.1mm external and 25.5mm internal for maximum tire volume

  • Reinforced spoke bed

  • Stronger and lighter low-profile sidewalls for quicker acceleration

  • Compatible with standard tires when used with or without tubes

  • Multiple cassette and front and rear axle options, including the Cannondale Lefty

  • Wheelset weights: 1837g (26"), 1890g (27.5"), 1977g (29")

When we set out to build the ultimate trail wheelset, we never imagined it would go on to win so many World Cups and World Championships. Pros choose the Flow EX because it's lighter and stronger, but also because no tubeless system in the world works as well as our patented Bead Socket Technology. The lower profile sidewall of a genuine BST rim lets your tire expand to its full volume for less rolling resistance, more traction, and more control. And nothing seals like a true BST tubeless rim. When tubeless performance matters, no rim offers the same quality of seal and overall tubeless performance.

Optimized for trail and enduro use, the 25.5mm internal width of the Flow EX helps the rim stay light enough for all day epics, while an internal arch, reinforced sidewalls, and a thicker spoke bed offer excellent durability.

The Flow EX wheelset now includes our much stronger, more durable, and faster engaging Neo hub system. The Neo's larger bearings and a stronger, stiffer, shoulderless axle offer unmatched strength and durability. Featuring 4 precision pawls simultaneously engaging a 36-tooth ratchet ring for super-fast 10-degree engagement, the Neo also offers a 100% CNC machined hub shell and tool-free disassembly. Neo hubs also offer SealLock end caps that lock into place and put an end to loose and missing end caps. And with a huge range of options, including Boost, there's a Neo hub to fit just about any bike.  

The Flow EX with Neo hubs is the ultimate trail, all-mountain, and enduro wheelset.

What’s Included: Flow EX wheels include pre-installed tape for tubeless use and presta valve; Neo OS hubs and endcaps for both 15mm and 20mm axles. These endcaps are not compatible with standard Neo endcaps.

Rim Internal Width: 25.5mm            Wheelset Weight: 1837g (26") / 1890g (27.5") / 1977g (29”)
Rim External Width: 29.1mm   Rim Weight: 490g (26") / 510g (27.5") / 545g (29")
Rim Depth: 17.8mm   ERD: 537mm (26") / 562mm (27.5") / 601mm (29")
Spokes: Sapim Force Black 2.0/1.7/1.8mm   ETRTO: 559x25.5 (26") / 584x25.5 (27.5") / 622x25.5 (29")
Nipples: Sapim Secure Lock Alloy Silver   ISO: 26"x29.1mm / 27.5"x29.1mm / 29"x29.1mm
Hub: Neo OS/NEO   Tape: 25-27mm
Hole Count: 32-hole   Valve: 35mm Presta
Rim Material: 6061 Aluminum Alloy   Max Spoke Tension: 125kgf (1225N)
Rim Color: Black   Max Pressure with 2.3" Tire: 38psi
Hub Color: Black   Max Pressure with 2.7" Tire: 35psi
Brakes: Disc Only   Max Rider Weight: 250lbs (113 kilo)
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To submit a warranty claim outside the U.S., please contact your point of purchase or the authorized distributor within your country for the best service and support.

**Purchases made through eBay or similar resale sites are not supported under our warranty policy.**

Aluminum Rim Warranty and Crash Replacement Policy

Two Year Aluminum Rim Warranty

All Stan’s NoTubes Aluminum rims are covered under a 2 year warranty against manufacturing defects from the original purchase date. Warranty does not cover abuse, misuse, consequential damages, normal wear and tear, and improper installation. Warranties only apply to the original owner. If a product is found defective, the customer will receive, at the discretion of Stan’s NoTubes, free repair or replacement.

One Year Aluminum Rim Crash Replacement

Should you have the unfortunate experience of crashing and damaging your Stan’s NoTubes aluminum rims, we want nothing more than to help you get back on the bike as quickly as possible.  The Crash Replacement Policy covers the rims for a period of 1 year from the original purchase date against damage caused during normal operation of the bicycle, including racing.  Crash Replacement Pricing includes new rim, spokes, nipples, tape, and costs associated to build labor. 

Three Year Hub Warranty

All Stan’s NoTubes hubs are covered by a 3 year warranty against manufacturing defects. Warranty does not cover abuse, misuse, consequential damage resulting from incorrect or nonexistent maintenance, normal wear and tear, and improper installation. Warranties only apply to the original owner with valid sales receipt. If a product is found defective customer will receive, at the discretion of Stan’s NoTubes, free repair or replacement.

Warranty and Crash Replacement Conditions

  1. Warranty and crash replacement are valid only for the original owner and are not transferrable.

  2. Warranty does not cover the following:
    • Damage sustained during shipment.
    • Products on which serial numbers, production lot codes/date codes or other identifying marks have been removed.
    • Normal wear and tear, misuse, incorrect installation or improper maintenance, use of incompatible parts or components, accident or crash damage, negligence, modifications not recommended or approved by Stan’s NoTubes.
    • Shipping costs to Stan’s NoTubes or local distributor.
    • Instances determined to be cosmetic only.
    • Any representation or warranty expressed or implied by a third party beyond the provisions of this stated policy.


Stan’s Tubeless System provides you with the information and items you need to seal most tires and rims tubeless. When attempting this process, ride with caution the first initial rides to observe the reaction of your tires and rims. Due to the variety of tire and rim combinations, some may work much better than others. During your first few rides check your tire for leaking and correct air pressure. If your pressure drops too low there is a risk of the tire dismounting itself. The system allows the use of standard, tube-type tires, to be used in a tubeless manner. It should be noted that doing so exceeds the tire manufacturer’s original design intent and may void the tires warranty. Also, some tube and tubeless tires were not designed to be used with sealant and doing so may void the tire's warranty. Stan’s is not responsible for any damage to the tires and/or any injury or liability resulting from the use of a tire beyond the original design intent.

Our Technology

  • NEO


    Our entirely new Neo & Neo Ultimate hubs offer maximum durability, quicker engagement,& options to fit every axle standard.

    Learn More
  • BST


    BST rims are designed to match the shape of your tire's bead to create a safer and more secure air tight interface.

    Learn More