Stan's latest version of their Flow wheelset uses an updated aluminum rim profile, along with an entirely different (and very clever) hub design. That second point will be welcome news to riders that had issues with Stan's Neo hubs in the past – those hubs weren't exactly known for their longevity.
There are 29” and 27.5” versions of the Flow MK4 wheelset, or you can purchase it as a mixed wheel setup – Stan's sells front and rear wheels individually on their website. The front wheel is priced at $308 and the rear is $657, for a total price of $965 USD.
The rims are covered by a 3-year warranty against manufacturing defects, although that won't cover you if you come up two feet short on a road gap. If that happens, Stan's has a 1-year crash replacement policy that gives riders 50% off a replacement rim. As for the hubs, those are covered by a 5-year warranty against manufacturing defects.
Stan's Flow MK4 Wheel Details• Wheel size: 29" or 27.5"
• Intended use: trail / enduro / DH
• Rim material: aluminum
• Rim width: 30mm (internal)
• Hubs: M-Pulse, 1.66° engagement
• Rear hub spacing: 12 x 148 or 12 x 157
• Weight: 881 g (front) / 1039 g (rear) / 1920 g total (29")
• MSRP: $965 USD / rim only: $129 USD
• More info:
notubes.com DESIGNThe new Flow MK4 rims have an asymmetric profile, which makes it possible to use the same spoke length for the entire wheelset, eliminating the need to have multiple spoke lengths on hand just in case. Those 32-hole rims are constructed from 6069 aluminum, with a welded joint and a reinforced spoke bed.
They're laced up to the hubs with a three-cross pattern using Sapim D-Light spokes and alloy nipples. I prefer brass nipples over alloy, since they're less like to round out during truing, but they're not as common on pre-built wheelsets these days. The internal rim width is 30mm, a number that's pretty much become the norm for trail and enduro wheels, since it works well with tire widths from 2.3” to 2.6”.
What makes the new hub stand out is the use of magnets on each pawl. Small circular neodymium magnets pull the 6 pawls upwards into the drive ring, a design that Stan's says provides better engagement with less drag. And yes, it's based on Project 321's design – the Oregon-based company manufactures the freehubs for Stan's. Personally, I'm a huge fan of the fact there aren't any miniature springs underneath each pawl, since those seem to pop off and bounce into the darkest recesses of my shop exactly when I don't want them to.
The 6 pawls are oriented so that two at a time engage with the 72 tooth drive ring, which equates to 216 points of engagement, or 1.7-degrees of rotation between engagment. In other words, there's minimal crank rotation to engage the hub. It's not as quick as I9's Hydra hubs, which only have .52-degrees between engagement points, but it's not far off, and is up there as one of the quickest engaging hubs on the market.
SETUPThis wheelset saw action in the wettest and the driest parts of the year here in Washington, so it's been exposed to the full gamut of mud puddles and moon dust. For the majority of the test period is was on a Stumpjumper EVO alloy, with a Maxxis DHR II DoubleDown rear tire and an EXO+ Assegai front and no inserts. My typical pressures were around 21 psi in the front and 23 in the rear, changing slightly depending on conditions. Tire installation was a breeze, and everything popped into place without any fuss.
ON THE TRAILI've reviewed several different iterations of the Flow wheels over the years, and every time 'neutral' is the word that I end up using to describe the ride feel. They're not crazy soft or crazy stiff, which makes them one of those wheelsets that doesn't dramatically the ride feel of a bike. Now, 'middle-of-the-road' may not be a marketer's dream product description, but when it comes to wheels that's a good place to be.
Suspension and meaty tires do a lot to disguise wheel attributes, and it takes something dramatically different to deliver a tangible difference. Still, I could notice the slightly softer ride quality of these wheels compared to the carbon WTB CZR wheels I'd had on previously. Aluminum wheels tend to have a slightly more damped quality than stiffer (and more expensive) carbon options, and that was certainly the case here. There wasn't any harshness, and they were nice and comfortable on chunky, brake-bump filled trails.
This time around, it's really the hubs that are the main talking point. The fast engagement is most noticeable in slow speed, technical sections of trail, the type where you take a half pedal stroke here, and a half pedal stroke there. Whether ultra-fast engaging hubs are better than hubs with more moderate numbers is up for debate, but riders who are looking for a nearly instant response when stepping on the pedals will find a lot to like about the M-Pulse hubs.
Even with that high engagement the sound the rear hub makes when freewheeling isn't obnoxiously loud – it's audible, but not distracting at all. Riders that prefer super loud hubs could probably run a lighter grease or oil on the pawls, but for me and my sensitive ears the decibel level was ideal.
A rubber gasket on the non-driveside end cap would help improve the hub's water resistance.
DURABILITYThe rims themselves have held up well, with only one small dent in the rear wheel after plenty of rough miles.As for the overall build quality, I did need to add more spoke tension after a couple days in the Whistler bike park. That's not uncommon, since those brake bumps seem to rattle pretty much anything apart, although I will say that historically I've had more Stan's wheels need attention than, say, DT Swiss wheels. The Flow MK4's don't have crazy high tension to begin with, so it's important to keep an eye on them, especially if you're doing a bunch of shuttle or bike park laps.
Most of the bearings are rolling smoothly, with the exception of the non-drive side bearing on the rear wheel. That one has developed rust around the perimeter, and is feeling a little gritty. Again, these wheels have seen some very wet rides, but I do think a rubber seal on that side of the axle could help improve the hubs water resistance.
Pros
+ Quick engaging, easy to service hubs.
+ Very neutral ride feel – not too stiff or too soft
Cons
- Spoke tension dropped dramatically part way through testing
- Hub sealing could be a little better for really wet conditions
Pinkbike's Take | The latest version of Stan's Flow wheelset is the best one yet, but these days there’s no shortage of options in this category, and for riders who aren’t as concerned about quick engaging hubs it’s easy to find a less pricey option.
That said, the M-Pulse hubs are easily serviceable, and the ultra-quick engaging magnetic freehub is a truly innovative feature. The rims themselves are suitable for a wide range of riding styles, and can handle a decent amount of abuse – just remember to keep an eye on the spoke tension.— Mike Kazimer |
You can custom-build a wheelset just as good for half the price and even choose colors etc., or buy a better dt swiss wheelset for 600$. I dont get it
Why would anyone want to buy this?
Hope hubs -360.00 for the set, DT rims 150.00 each. Spokes are 120.00 (box of 100) should you be lucky enough to have the length the same for front and rear and drive and disc. Providing that you build them yourself you are still over your 700.00 budget? I keep hearing this argument about prebuilt wheels being overpriced and while some can build wheels on their own, most can not (or should not). A DT Swiss rear 1700 series wheel alone is 700.00 as well, just FYI.
If you are buying the same rim, you don't need new spokes, fyi.
But yeah, if you take a bad line choice or an accident and you ruin your own wheel that's on you. As with every other part of your bike, you have to pay to play. I like that Stan's will help take the edge off. Here in Canada their MK4 hoops are nearly $200 at retail, and you a little over $100 after tax by taking advantage of their crash replacement program. That's not nothing.
The ones from smack dab during the brunt of COVID in 2021 were worse... Hope Pro4 MS hubs, DT Comp spokes, DT brass nipples, DT EX511 32h 29er rims... $680 (but also these were white spokes that were $3 a piece instead of less than $1 a piece cause I was an a*shole this time).
So yea... way cheaper the last time, this one even with COVID and money wasting to not have to wait as long, is still cheaper after paying the LBS to lace em'. Price hunting is annoying, but it pays off. Same reason you can get Magura MT7 or Hayes Dominion brakes right now for $260 for both sets if you look around and people are still over here paying $500 for them.
The EX 511's are quite good, but they can certainly be dinged and dented. I actually think the MK4 hoops are pretty nice as well, for the record. The crash replacement is a nice bonus, and in my past experience Stan's will even cover the shipping to Canada. We should step back for a moment and agree this is something they don't have to do, and almost no other company does. I know a few people who have used it and appreciated being able to do so.
Used them loads over the years, I wouldn’t buy an off-the-peg set from a manufacturer again
How do they work?
Stans: What if I told you you could have the same thing, but no carbon, infinitely more magnets, and an entire $35 cheaper!!!!!!!
I’m not sure who these Stan’s wheels are for.
Dennis: "Whats your favorite hobby?"
Charlie: "Magnets"
Whats tour favorite food?
Milksteak
Now with Mk4 rims for $864 with Hydra hubs, $649 for 1/1 hubs, $625 for DT Swiss 350, $630 for Hope Pro 4.
260 lb guy here. I haven't had to true my 471s I hand laced to hopes in over 2000 miles. Only maintenance I've done is cleaning and regreasing the rear hub. If you're using anything else, you're wasting your time and money.
No component has ever skipped a beat in 1.5 years. Had to retension the spokes once, i dont even have a trueing stand.
ANY issue with seals or bearings in a wheelset of this pricepoint is inacceptable when dozens of wheelsets for much less money exist that have proven to be reliable over years and years
I ordered some last week so I'm hoping I don't have the same experience as your friend. It's much flatter here than Kicking Horse, though.
Good luck with your set... just add a few more PSI so you don't have to walk home
The car that made these two, equal-length tire marks had positraction. You can't make those marks without positraction, which was not available on the '64 Buick Skylark!
- Dwight Schrute
-Michael Scott
They are both great though
Did you reach out to Stan's? I bet they will warranty it with zero hassle. That sounds odd! The MK4s build up really well, so I would think that sort of failure is probably about of an anomaly.
The are one of very few rim makers who actually have a 50% off crash replacement policy on their alloy rims as well.
The MK3 were cheap and easy to replace, so I just kept running them.
I’d love to see a longer term test though. Every pair of Stan’s rims I’ve seen the past several years has developed stress cracks at the spoke holes, usually within one season.
Older Stan’s rims didn’t have that issue, and their rim shape does make for easy tire installation.
It’d be great to have an alternative to DT rims.
The old freehubs and axles were a joke. Pawls migrating into the freehub body, freehub body cracking, axles snapping.
Wouldn't dare put them on an eeeb, wouldn't make it up the first climb
Isn't checking spoke tension on a new wheel pretty standard after a few rides?
Prices are just so insane for such negligible returns I always just settle into building up Stans rims w/ Bitex hubs and can keep a build around $500. Engagement is at that sweet spot to not be annoying, Bitex offers a steel axle to solve the one issue of hard riders breaking the alloy axle, and these things are just impossible to beat even when I have money to throw around.
Sorry money in my wallet, you will get throw at something that actually gets me some return for my $.
Can't say nothing about those hubs tho.
a) impacts to magnets cause them to loose their magnetism
b) neodynium magnets are very very brittle, and have a tendencey to smash (assuming neodynium, i appreciate)
c) magnets attract swarf metal wearings from things like bearings, pawls and drive rings.
Its a no from me.
Source: Bilt Nyge the science guy.
the owner said "everybody has a bike and no money now"
So that tells me its time for brands to start competing for cheapest products again. im seeing more and more People wanting "value"
F*cking magnets, how do they work?
And I don't wanna talk to a scientist
Y'all motherf*ckers lying, and getting me pissed."
Is there a adamantium upgrade available?
If I was going to spend 1K on a pair of aluminum rims, I'd be looking at Rolf for a much better value.
"one of those wheelsets that doesn't dramatically the ride feel of a bike."
Proofreading!! How does it work?!?!
Though I do agree the time limits are pretty weak.
Cons: Your nice hubs have a STANS logo on them.