Stan’s Announces Wheels With New M-Pulse Hubs
PRESS RELEASE: Stan's
In a world filled with chaos, division, and uncertainty, Stan’s would like you to know we’ve made a really nice set of hubs. Seriously, we went all in on this. Designed and refined over the past two years, the new M-pulse hubs combine quality materials and construction with a smarter engagement system. These new hubs won’t solve the world’s biggest problems, but they will offer years of reliable engagement and less resistance than conventional pawl and ratchet style hubs.
What’s So Special About the New Hubs?
In a word: magnets. Yes, we’re talking about the same things that power Iron Maiden’s amplifiers and let billionaires’ electric trucks tow around their rocket ships (which also use magnets). The heart of the M-pulse hub is a bombproof locking engagement system with six pawls equipped with Neodymium rare earth magnets. With 216 points of engagement, M-pulse hubs need only 1.66° of rotation to start putting power to the rear wheel. When engaged, multiple teeth on each pawl lock into a hardened steel ratchet ring while each pawl’s magnet ensures perfect alignment.
This not only lets M-pulse freehubs engage more reliably and consistently than traditional spring-based pawl designs, but also provides an even more important advantage: less friction and rotational resistance when not engaged. Less friction holding you back means more you going fast, and with less effort.
The M-pulse engagement system is based on the innovative Project 321 magnetic pawl design, and all freehub body shells, magnetic pawls, ratchet rings, spacers, and axles are manufactured at Project 321’s small-batch CNC shop in Bend, Oregon. Each M-pulse hub is then assembled entirely at Stan’s headquarters in Big Flats, New York. Machining the key M-pulse components in the U.S. and assembling the hubs ourselves in New York allows a higher degree of precision, attention to detail, and quality control.
Why Are Magnets Better?
All hubs suffer from momentum-robbing drag as you coast, but when it comes to creating the most efficient and reliable ratchet system, pulling is better than pushing. Conventional mechanical pawl springs are constantly attempting to push the pawls into the ratchet ring. Those push springs are weakest when fully extended, as the teeth of the pawl engage with the teeth of the ratchet ring, but as you coast and the teeth of the pawl disengage and move down out of the teeth of the ratchet ring, push springs compress and exert even more pushing force. This creates significant drag and friction.
Unlike these inefficient mechanical push spring systems, M-pulse hubs use the pull force of Neodymium magnets to reduce drag to the absolute minimum, while still being able to engage with reliable precision the instant you push on a pedal. Magnetic pull springs are at their strongest when the pawl is engaged and are weakest during coasting, the ideal scenario to reduce drag. Project 321’s patent pending placement of the powerful but small rare earth magnets let the pawls self-align quickly and consistently during engagement while creating a hub with almost no rotational resistance when coasting.
The M-pulse hub's six magnetic pawls and hardened steel ratchet ring are also built to outlast conventional mechanical springs, which can fatigue, lose tension, and become misaligned over time. With better durability, stronger engagement, and less drag, the M-pulse design is a better way to build a hub.
More Than Just Smart
Because an innovative design is only as good as its materials and construction, each detail of the M-pulse hub has been engineered to systematically eliminate weaknesses found in traditional pawl and ratchet style hubs. The new M-pulse hub starts with the most simple and durable version of Project 321’s magnetic pawls, and features an all new freehub body and main seal design for outstanding protection from the elements. Every bearing on the M-pulse hub is shielded, meaning no bearing seal is directly exposed, for smooth rolling in all conditions and increased bearing life. The 17mm axles are made of 7075 aluminum and roll on long-lasting Enduro brand bearings that feature custom-tuned grease fills that reduce resistance. A double-row main freehub bearing was chosen after tests proved it to be more durable than two individual, separate bearings. Multiple teeth on each pawl provide a greater surface area to distribute load to improve engagement, and the angle of the pawls was optimized to distribute stress away from the rotating bearings for added durability under high torque.
Beyond the strength and speed of engagement, M-pulse hubs feature adjustable preload that decreases drag and resistance for less effort and more speed. Adjustable preload also prolongs bearing life by allowing the hub's bearing tension to be tuned with greater precision in contrast with most hubs that tension unevenly by relying solely on how much the bike’s axle has been tightened. A precision piece of equipment deserves the option of precise tuning, and the M-pulse hub's adjustable preload, available on both the front and the rear hub, delivers that level of tuning precision.
With their quality materials and construction, M-pulse hubs are backed by a 5-year warranty.
The Perfect Match for MK4 Asymmetric Rims
M-pulse hubs are available as complete wheelsets (MSRP starting at $965) laced to the MK4 asymmetric rims, including the 30mm wide Flow MK4, 28mm wide Arch MK4, and 25mm wide Crest MK4 that were all launched last summer. With flanges optimized to better balance spoke tension on each side of the rim, M-pulse hubs allow a single spoke length to be used for an entire matched MK4 wheelset. When it comes to ease of maintenance, nothing beats being able to use the same spoke length for every repair. All wheels continue to rely on traditional J-bend spokes, the most commonly available spokes that are easy to find, should you ever need a replacement.
Real World Tested
A Crest MK4 wheelset featuring the new M-pulse hub was put through the wringer when it went out on a 303 mile, 30+ hour ride. Will Loevner, a name that's becoming synonymous with ultra endurance challenges, rode the Wilderness 101 lap, a 101 mile endurance race, three consecutive times. The loop features classic East Coast single track and proved to be no challenge for the new hubs.
 | Overall I was amazed to not get a single flat tire during the 303 miles. I still can’t believe how well the Crest MK4 wheels held up over what must have been a million rocks by the end of the ride. -Will Loevner |
Additional Information
All carbon CB7 and the Podium SRD series wheelsets will also roll on the new M-pulse hubs.
However, M-pulse hubs will not be available on the downhill and enduro-ready Flow EX3 and on the more affordable S2 series wheels. Both are built with the E-sync hubs introduced last June.
M-pulse hub options include Shimano Micro Spline, HG, or SRAM XDR freehubs, in 6-bolt or Centerlock brake style, and configurations to fit all popular through-axle widths.
All wheelsets equipped with M-pulse hubs are also part of the Stan's Connection Program. With each wheelset registration, we’ll donate $10 to support the local trail group or cycling-related charitable organization of your choice.
For more information, visit www.NoTubes.com.
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Member since Oct 21, 2014
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P321 hubs are phenomenal. I think Stan's got this collaboration right.
Friggin Stan’s hubs, 1 week, 1 week I got out of the first one. Not much better on the warranty replacement, or the one after that, or after that…..they are the worst “backup” wheel set I could have purchased.
Somehow Stan’s has been able to weather this storm, as I think there rims are an excellent product.
I’m assuming Stan’s and P321 are making it known that these are essentially P321 units, and the cost savings comes from the assembly by Stan’s (I still think these cost out to be more expensive than having P321 just build you a wheel to a Stans rim, which they have always been able to do)
Make it happen
I'll show myself out....
I've personally never felt an attraction to one.
Only real gripe I have is they leak with even with the recommended half amount of oil leaving my hub and cassette caked with oil and dust.
It's the breaking axles and stripping ratchet rings that suck. Did those get updated?
Again, options! I'm glad we have many.
I wonder why Shimano ditched their silent hub...
Bearing preload on the other hand, is actually not a bad thing. Many other high end hubs like Chris King and Hadely for example, require you to preload the bearing because they use angular contact style bearings. when properly preloaded, they will handle side loading better than a standard radial bearing. But, the owner has to pay attention to that, and riding them with slack will ruin your bearing. I've never Found Onyx or CK need much of any adjustment after the first couple of rides.
But I agree, to each their own. Fortunately there are lots of great options!
While offering zero data to back it up.
Hard pass.
Go prove it's better than a Chris King or Hadley hub.
I use these magnets at work to mount GPS recvr components to the inside of heavy equipment cabs and they’re no joke first time I tried to attach one my fingers were smashed between the rec and the machine like instantly it sucked they’re strong as sh%10-4
Id like to never got my flangies bk .anybody know if the other side of each magnet is magnetic to the pawl its mounted in or is it tryin to push itself out like two magnets put together? If so that seems like a prob waiting to happen?
TBH I see a lot of potencial problems with this "new greatest "...Sh!t gets over complicated and beyond self servicable...back in the day though...
While the MK3 wheelset was around £500 (not cheap by any means for an alloy hoops) the MK4 (wits supposedly much better hubs) is in a region of a decent carbon wheelset from other brands.
I think Stans shoot themselves in the foot setting the RRP.
they work amazing and have for many years.
www.kappiuscomponents.com/collections/hubs/products/kh-1-5-rear-hub
They have been using their patented system for several years.
Props to Stan’s for leveling up their hubs!!!
Specialized legal department has entered the chat.
What kind of noise do they make while you're doing "Sik whips"!!!!!!
P321 has both loud and quiet configurations, so no need to fuss too much trying to use thick grease that will bog the hub down. Just use super slippery Dumonde grease or oil as DiryMcLeod has noted.
Otherwise, the magnets in P321 have been perfectly reliable for the wheels I have built.
@healthy-not-sick-biker definitely do NOT use thick grease on magnetic pawled hubs. Will lead to a faceplant when you try and lay down some watts.
Magnetic pulling force can be considered progressive. Light at relaxed state, then ramp up really high when it's close.
What part is "opposite"?
The magnet has two poles and they are the south pole and the north pole.
The magnetic force of lines never intersects each other.
The magnetic force can be either attractive or repulsive.
The magnetic force always travels from the north pole to the south pole