Wheels

DESCRIPTION:

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.

WHAT'S INCLUDED:

Flow MK4 wheels include pre-installed tape for tubeless use and presta valves.

For Tubeless tires only!

Features:

• Versatile endurance wheelset for the modern road bike with tubeless and hookless rim profile
• Lighter Weight than its predecessor, making it nimble and fast.
• Tubeless Made Easy, optimized tire bed sign allows for simple tool-free installation and removal with no need for an air compressor to seat the tire.
• Ultra-wide 25mm rim profile creates a better tire interface to be fast on or off the road
• New 40mm rim depth makes a light and aero wheel in every situation
• New ZR1 DB hub is engineered in Germany with better seal design for improved durability and quicker response with 66 points of engagement
• Ships with 12mm front and rear end caps
• Center locking rotor interface. Lockring is included with the wheels
• XDR™ or SRAM/Shimano driver bodies

ZIPP's Hookless Tire Compatibility Guide

Choosing the best tubeless tire for your Zipp road wheels is simple now. See the specific guidelines on selecting a tubeless tire for Zipp road wheels with a hookless rim-tire interface, along with a list of approved tires by make and model: ZIPP's Hookless Tire Compatibility Guide