Stans No Tubes Flow MK4 29´´ 6B rear wheel

The Flow MK4 wheelset lets you do more. Since 2007, there´s a reason the best riders in the world have come to us to ask for Flows. Corner harder, send it further, and carry more speed through any section of trail. Today´s Flow MK4 gives you the control you need to push boundaries.
The Flow MK4 rim´s patented BST-Asymmetric shape creates the most reliable tubeless seal. The rim´s durable 6069 alloy construction and reinforced spoke bed, combined with the offset drilling of the asym design, builds into an incredibly durable wheel that brings added confidence to every ride. Strength and serviceability are long-standing priorities of every Stan’s wheel, and the Flow MK4 wheel takes those priorities further than ever before. The asym rim design allows for a single spoke length to be used on both the front and rear wheels. As with all Stan’s wheels, traditional J-bend spokes and lacing are used for their proven strength, ride quality, and serviceability.
The M-pulse hubs at the heart of Flow MK4 wheels combine an absolutely bombproof magnetic locking engagement with incredibly smooth rolling. Based on the original innovative Project321 engagement system, the speed and durability of this system is unmatched. Unlike weaker pawl and spring designs, the M-pulse features six pawls with Neodymium magnets that offer virtually no resistance when coasting, but lock the pawl teeth into place far more reliably and consistently than springs. Each detail of the M-pulse hub was engineered to systematically eliminate weaknesses found in other designs. The 17mm axles are made of 7075 aluminum and roll on Enduro brand bearings, including a double-row freehub bearing tested to be far more durable than two individual separate bearings. The entire hub is also shielded, meaning no bearing seal is visible, offering superior protection for all conditions. With only 1.66°of rotating required for the M-pulse hub to engage, power is always instantaneous. Multiple tooth engagement provides a greater surface area to distribute load to improve both durability and speed. The angle of the pawls was even optimized to distribute stress away from the rotating bearings. Beyond the strength and speed of engagement, M-pulse hubs feature adjustable preload, allowing a tremendous decrease in drag for less resistance and more speed.
Available with Shimano Micro Spline, HG, or SRAM XDR freehub, and 6-bolt or Centerlock brake style, with options to fit all popular axle configurations.Tubeless ready with rim tape installed.
Wide, light, strong, and tubeless, the original Flow redefined what a mountain bike rim could do. Today´s Flow MK4 gives you the confidence to do even more.


Features:

- Low-profile 30mm internal width optimizes tire shape, traction, and control for 2.3-2.6” tires
- Durable 6069 aluminum with welded joint and reinforced spoke bed
- BST-Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build
- M-pulse ultra-low drag magnetic pawl adjustable hubs with 1.66° engagement
- Enduro bearings with double-row freehub bearing
- Matched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceability


Specifications:

- Rim Internal Width: 30.0mm
- Rim Weight: 521g (29´´)
- Rim External Width: 33.6mm
- Wheelset Weight: 1882g (29´´)
- Rim Depth: 18.9mm
- Front Wheel Weight: 865g (29´´)
- Spokes: Spoke, Sapim, D-Light, 2.0/1.65/2.0
- Nipples: Sapim Double Square Alloy Black
- ERD: 600mm, 3.0mm Offset (29´´)
- Hub: M-pulse
- ETRTO: 622x30.0 (29´´)
- Hole Count: 32-hole, 32-hole
- ISO: 29´´x33.6mm
- Rim Material: 6069 Aluminum Alloy
- Tape: 33mm
- Max Spoke Tension: 130kgf (1275N)
- Max Rider Weight: 250lbs (113 kilo)
- Max Pressure with 2.30´´ Tire: 39psi
- Brakes: Disc
- Max Pressure with 2.60´´ Tire: 34psi
- Valve: Presta


Technology:

Stan´s Bst-Asymmetric Technology:
- Bst-Asymmetric Rims Combine Stan´s Patented Bead Socket Technology--The Original And Still Most Reliable Tubeless-Ready Rim Design--With An Asymmetric Shape That Allows For Offset Spokes, Creating A Stronger Overall Wheel. Most Asymmetric Rims Struggle To Inflate Easily And Maintain A Reliable Seal On Both Sides Of The Rim, But Stan´s Bst-Asymmetric Rims Equalize Tire Retention And Dent Resistance On Each Side Of The Rim, Allowing For Easy Inflation And Total Ride Confidence Under Even The Hardest Cornering.
Stan´s Bst Asymmetric Rims Feature Distinct Spoke Hole Offsets Based On Rim Width. At 25mm Wide, Crest Mk4 Rims Have 1.5mm Of Spoke Offset. The 28mm Arch Mk4 Rims Use An Offset Of 2.5mm. The 30mm Wide Flow Mk4 Rims Use A 3mm Offset. This Level Of Precision Optimizes Spoke Tension Balance And Allows For The Strongest And Most Effective Tubeless Rim Shape. The Crest Mk4 Asymmetric Rim, For Instance, Has A Near Perfect 92% Balance Between Drive Side And Non-Drive Side Spoke Tension, Versus The 58% Spoke Tension Balance Of Previous Symmetric Crest Mk3 Rims. When Used With M-Pulse Or E-Sync Hubs, Stan´s Mk4 Bst-Asymmetric Allows A Single Spoke Length To Be Used For All Matching Sets. Whether You Choose A Mk4 Wheelset With M-Pulse Hub Or S2 Wheelset With E-Sync Hub, A Complete Set Of Stan´s Crest, Arch, Or Flow Wheels Will Each Use Only A Single Common And Readily Available Spoke Length That Works Front Or Rear, Either Drive Side Or Non-Drive Side, Making Maintenance And Service Easier Than Ever.

Stan´s Notubes Wideright Rim Design:
- The Most Important Piece To The Bicycle-Terrain Interaction Is The Contact Patch Between The Tire And Terrain, So Tire Profile And Tire Pressure Play Huge Roles In Bicycle Performance And Overall Handling. But Many Rims Just Don´t Work Well With The Tires We´re All Using. Rims That Are Too Narrow Fail To Offer Sufficient Sidewall Support And Protection To Your Tires And Create A Less Stable Shape. The Result Is Less Control In The Corners, Less Traction On Climbs, And More Rolling Resistance. Rims That Are Too Wide Also Distort The Tire Profile, Decreasing Traction And Control And Driving Impacts Directly Into The Rim, Negating The Impact Absorbing Advantages Of A Tire´s Volume. Our Wideright Rim Widths Are Designed To Strike The Perfect Balance Between Tire Volume And Sidewall Function.
Wideright Rim Profiles Allow The Tire To Achieve Its Proper Shape, And That´s The Foundation For A Great Handling, Fast-Rolling, And Responsive Bike.

M-pulse Hubs:
- Combining the best materials and construction with a smarter engagement system, M-pulse hubs are built to roll smoother longer. The heart of M-pulse hubs is the magnetic locking engagement system based on the innovative Project321 design and manufactured in their small-batch, high-precision facility in Bend, Oregon. M-pulse freehubs feature six pawls equipped with Neodymium magnets engaging every 1.66° with more force than traditional spring-based pawl designs and less resistance when coasting. With less friction and drag, M-pulse hubs spin

What´s Included:
- Flow MK4 wheels include pre-installed tape for tubeless use and presta valves.

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