Stans NoTubes Flow EX3 32H Rim

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Product Description

The Flow EX3 is the most reliable tubeless rim made for handling faster speeds on the most demanding trails. If you’re looking for the ultimate rim for enduro and DH racing, something to
handle the increased weight and added speed of an E-bike, or just want the most durable rim possible, this is it. The Flow EX3 combines the 29mm internal width and durable 6069 aluminium
construction of the Flow MK3 with the incredibly strong triple cavity design of the classic Flow EX rim. The result is a new rim shape that perfectly balances radial compliance with lateral
stiffness and sets an entirely new benchmark for durability and impact resistance.

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. But the Tiebeam brace and patented low sidewalls 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 aluminium and WideRight 29mm inner width optimized for 2.35” to 2.8” tires, the Flow EX3 is the evolution of the Flow line for aggressive riding on today’s faster and more capable bikes and E-bikes. Every World Cup DH and Enduro World Series win, every hour of testing, riding, and
improving, it’s all here in the Flow EX3.

  • What is it? The new Flow EX3 is an incredibly strong rim we’ve developed for enduro, downhill, and more demanding trail riding. Still lighter than competitors (580g for 27.5), the Flow EX3 is the ultimate rim for riders who push limits.


  • Why did Stans make it? With slacker angles and better suspension, today’s “trail bikes” are more capable than many downhill bikes were only a few years ago. Factor in e-bikes, and it is clear consumers are riding heavier, more capable bikes, and riding those bikes faster than ever. This rim can handle the fastest and most aggressive riders out there.


  • Does it replace the Flow MK3? No. The Flow MK3 remains one of the best rims made for aggressive trail and all mountain riding, but the Flow EX3 is built to handle even more.


  • What makes it so special? In a word: Tiebeam. The specific position of the brace inside this triple cavity rim lets it withstand far more impact force than any alloy rim we’ve ever tested. Our patented low sidewalls and stronger 6069 alloy construction together with a new bead-blasted finish and stronger overall rim shape make this the rim everyone is going to want in 2019.


  • Will it make me faster? Oh hell yes! This is the rim used by GT Factory’s Martin Maes to win both the Crankworx Whistler Enduro World Series and La Bresse World Cup DH last year. It enters the market with a proven track record of performance.


  • Who will be using it?
    Look for the Flow EX3 on these 2019 DH and enduro teams in 2019:
    • GT Factory
    • Atherton Bikes
    • Propain
    • Cannondale


  • The Weights:
    Rim – 27.5″ – 580g and 29″ – 618g
    Wheelset – 27.5″ – 2018g and 29″ -2115g (Using Stans Neo Hubs & Sapim spokes)


Key Features:

  • Patented low-profile tubeless rim design balances lateral stiffness with radial compliance
  • Designed, tested, and raced to victories on the World Cup DH and Enduro World Series circuits
  • Built to handle the added speeds and increased forces of today’s longer travel trail, enduro, DH, and E-bikes
  • Tiebeam triple-cavity rim design resists damage and prevents air loss under impacts
  • 29mm internal width optimized for 2.35” to 2.8” Trail, All-mountain, and DH tires
  • Most trusted tubeless system for easy setup and low maintenance
  • 6069 aluminium alloy is stronger than conventional 6061 alloys
  • Bead Blasted “BBQ” finish for added durability



  • Technology: RiACT, WideRight, BST, Tiebeam
  • Rim Internal Width: 29.0mm
  • Rim External Width: 32.6mm
  • Rim Depth: 17.9mm
  • Hole Count: 32-hole
  • Drilling Style: Symmetrical
  • Rim Color: Black Bead Blasted Finish (BBQ)
  • Material: 6069 Aluminum Alloy
  • Brakes: Disc only
  • Rim Weight: 580g (27.5) / 618g (29”)
  • ERD: 564mm (27.5″) / 602mm (29″)
  • ETRTO: 584×29.0 (27.5″) / 622×29.0 (29″)
  • ISO: 27.5″x32.6mm / 29″x32.6mm
  • Tape: 30mm
  • Valve: Presta
  • Max Spoke Tension: 125kgf (1225N)
  • Max Pressure with 2.4″ Tire: 37psi
  • Max Pressure with 2.8″ Tire: 26psi
  • Rim Weight: 580g (27.5″) / 618g (29″)

Occasionally, without notice, manufacturers change product design and/or specifications.

Wheels Guide


Wheels Guide

Wheels are the components that will have the biggest effect on speed and efficiency as well as the way your bike feels. Whether you are looking for a new wheel set or are giving your existing set some TLC this guide will help you find what you need.

Mountain Bike Wheels

MTB wheels are available in different diameters with different size hubs. While some bikes are compatible with both 650b+ and 29” wheels, most bikes are designed to work with a specific wheel size.

When replacing an existing wheel, it’s important that you get one that has the same rim diameter – 26”, 27.5” (650b) or 29” - as well as the same hub width and axle type. The other thing to look out for is brake type – disc or rim – and freehub type.

mountain bike rider

Road Bike Wheels

The standard road bike wheel size is 700c although some junior road bikes and gravel bikes have smaller 650b wheels. The main differences between road bike wheels is the rim type; clincher or tubular. Clincher wheels have a regular tyre and inner tube. Tubeless wheels are clinchers that can be used without inner tubes. The inner tube and tyre are combined in tubular tyres.

Traditional road bike wheels use QR axles. Many disc brake wheels now use bolt through axles that will only fit compatible frames. When replacing road bike wheels make sure that you buy the same type of wheels, so they are compatible with your frame.

view of road bike rear wheel

Hybrid Bike Wheels

Hybrid bike wheels are usually 700c which is the same as road bike wheels. Hybrid bike wheels usually have wider rims to support the wider tyres. You can use road bike wheels for hybrid bikes as long as the axle and brake type are the same.

Shop Hybrid Bike Wheels
two cyclists on hybrid bikes

BMX Wheels

As the name suggests BMX wheels are for BMX bikes and these are mostly 20” in diameter with nutted axle. Cruiser BMX bikes have larger diameter wheels while some kids BMX bikes have smaller wheels.

Shop BMX Wheels
BMX Bike Rider

Kids Bike Wheels

This is where you will find replacement wheels for your child’s bike. When buying a replacement wheel it’s important to get on that is the same diameter. Rear wheels do not include the freewheel or cassette these are purchased separately.

Shop 20"- 24" Kids Bike Wheels
kids on bikes

Skewers & Axles

Replacement QR skewers for quick release axles and bolts for through axles can be found in this category.

Shop Skewers and Axles
skewer and thru axle

Wheel Accessories

This is where you will find tubeless valves, valve cores and valve caps as well as rim tape and replacement decals for the wheel rim.

Shop Wheel Accessories
valves and tape

Wheel Spares

Components like end caps, axle caps, disc brake conversion kits and axle conversion kits can be found in the wheel spares category.

Shop Wheel Spares
wheel hub spares

Jargon Buster

Bolt On – an axle that is incorporated into the hub with nuts on the end. Designed to work with traditional 9mm or 10mm dropouts. AKA nutted axle.

Bolt Though Axle – an axle that goes through the hub body and fixes to the fork or frame of you bike. Usually 12mm 15mm or 20mm.

Brake type – wwheels are designed to work with specific brake types; disc or rim. Disc brake wheels will either have a 6 bolt or a centre lock fitting.

Clincher – most common type of rim on all bikes works with tyres that have a bead. Tubular tyres on road bikes are different.

Eyelet - A fitting in the rim that holds the nipple in place.

Freehub – The freehub allows the rider to stop pedalling whilst the bike is still moving forward. The rear cassette is attached to the freehub body - 7 speed and above.

Freewheel – an early version of the freehub where the freewheeling mechanism is attached to the sprockets rather than the wheel hub – 5, 6 & 7 speed.

Hub - The centrepiece of the wheel, from which the spokes branch out to the rim. Rotates around the axle, which is an external component attached to the fork or frame.

Hub flange - The collar of the hub that the spokes attach to.

Lacing - The pattern in which the spokes are threaded when building a wheel. The exact same wheel threaded in a different pattern can produce a completely different ride character.

Nipple – The small component that the spokes screw into at the rim.

Rim - The outermost component in a wheel. The bit the tyre sits on.

Rim tape - tape that covers the nipples inside the rim to protect the inner tube – see also Tubeless rim tape below.

Spoke - The rods connecting hub to rim. J-Bend spokes are most common – they are identified by the bend at the hub end, and thread into the nipple at the rim. Straight-pull spokes have no bend and, as they are often proprietary to the wheel they are made for, are less readily available in bike shops.

Tubeless – Technology that allows does away with the inner tube

Tubeless rim tape – Rim tape that makes an air tight seal around the rim of tubeless compatible wheels

Tubeless Sealant – latex based liquid that you put inside tubeless tyres to get a good airtight seal. Tubeless sealant will self-repair small punctures.

True - A straight wheel is called ‘true’. If it gets a wobble, usually caused by the spokes unequally going out of tension, it is out of true.

Valves – The port of the bike that is used to inflate and deflate the tyre. There are two types of valve for bikes. Schrader valves are the same as those on car tyres while Presta valves are narrower bike specific valves designed for high air pressures. Valves are attached to the rim in tubeless set ups or included with the inner tube on traditional wheel setups.

QR – Quick release. Designed to work with traditional 9mm or 10mm dropouts. A quick release skewer fits through the wheel and allows you to quickly change the wheel.

Thru axle / TA – See Bolt Through Axle above.

Wheelset – both the front and the rear wheels are included in the wheelset

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

tnt delivery

Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.