- In stock, ready to ship
- Free shipping on all orders $59+
Do more and go further with the new Flow MK4 wheels from Stan’s No Tubes!
With Stan’s patented, BST-Asymmetric shape you can expect a top-of-the-line, reliable tubeless seal. While the durable 6069 alloy construction and reinforced spoke bed, combine to create an incredibly durable wheelset that builds confidence with every ride. Built with strength and easy serviceability in mind, the asymmetric rim allows for a single spoke length on both the front and rear wheels. Using traditional J-bend spokes and lacing for proven strength, ride quality, and serviceability for the life of each wheel.
What really set’s Stan’s Flow MK4 wheelset apart from the crowd is the rear wheel's new, magnetic engaged M-Pulse hubs. Featuring an innovative and bombproof magnetic locking engagement system that provides an unbeatable smooth-rolling, no-drag ride. Unlike weaker pawl and spring designs, the M-pulse features six pawls with Neodymium magnets that offer virtually no resistance when coasting, and reliably lock into place quicker than standard spring-based pawls.
Carefully engineered to eliminate weaknesses found in other hub designs, the 17mm, 7075 aluminum axles roll on Enduro-brand bearings, including a double-row freehub bearing that’s been tested to be more durable than two separate bearings. The hub is also fully shielded, with no visible bearing seals, giving your hubs superior protection when riding in any conditions. With just 1.66° of rotation needed to engage the M-Pulse hub, power is always there right when you need it!
Tubeless-ready with rim tape and presta valve installed.
Stan’s original Flow redefined what you could expect a mountain bike rim to do. And now, the Flow MK4 gives you the power to do even more!
- Flow MK4 wheels include pre-installed tape for tubeless use and Presta valves.
- Low-profile 30mm internal width. Offering optimal tire shape, traction, and control for 2.3-2.6” tires
- Durable 6069 aluminum with welded joint and reinforced spoke bed
- Enduro bearings
- BST-Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build
- Matched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceability
- Connection program includes 5-year hub warranty, 3-year rim warranty, 1-year crash replacement, and $10 donation to trail maintenance or advocacy group of your choice
Matching rear wheel: Stan's No Tubes Flow MK4 rear wheel
DETAILS:
Front Hub: Stans/Project 321 M-Pulse hub
- Rotor: 6-bolt
- Hub spacing: Boost (15 x 110mm)
Rim: Stan's Flow MK4
- Rim Size: 27.5", 29"
- Material: 6069 Aluminum Alloy
- Hole: 32h
- Internal width: 30.0mm
- External width: 33.6mm
- Tire width: 2.3 - 2.6"
Spoke:
- Sapim D-Light, 2.0/1.65/2.0
- # of spokes: 32
- Sapim double square alloy nipples
Weight:
- Wheelset: 1792g (27.5"), 1882g (29")
- Front wheel: 820g (27.5") / 865g (29")
Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right items the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!
Shipping
We currently offer both economy and expedited shipping options though FedEX and USPS.
Orders totaling over $59 are eligible to ship for free via an economy ground option of our choice.
Most bikes ship free within the continental US. Bike shipping to AK, HI, or PR is $250.
If you're in need of something super-quick, please contact us directly. We may be able to overnight your order with an additional fee and depending on your location.
RETURNS
Should there be an issue with the item you bought, or you no longer need your purchase, we will be happy to set up a return.
Component & Gear Returns
Returns may be requested within sixty (60) days of the delivery date. All returned items must be received in new, unused, and uninstalled condition, with the original tags and labels attached and in the original packaging. We cannot accept returns on any items installed or show wear of any kind.
Bike Returns
Returns or exchange requests for bikes must be requested by emailing us at sedona@thundermountainbikes.com within fifteen (15) days from the date of delivery. Bikes must be in un-ridden condition. Custom-built bikes may not be returned. Returned bikes have a $200 restocking fee and the customer pays for return shipping.
Return Shipping
Customers may choose to use our provided flat-rate return shipping label at $9, or choose a carrier of their choice to handle their product return.
The $9 flat rate label will be deducted from the refund issued for the return. You can either print this label after requesting a return from the Order History in your Account profile, or you can request that we email you the label.
For all other return shipping methods, please email us at sedona@thundermountainbikes.com after submitting your return request so that we can confirm the shipping information you should use to return your item(s).
REFUNDS
We will process your return after we receive your returned item(s) and inspect the condition. Please allow at least seven (7) days from the receipt of your item to process your refund. We will notify you by email when your return has been processed.
EXCEPTIONS
If you receive defective or damaged products or if we sent you the wrong products, please contact us using the phone number or email below.
RETURN PROCESS
To request a return, please log in to your customer account by clicking the 
Profile icon in the top right of any page or visit account.thundermountainbikes.com.
1. In the Email field, enter your email address and click Continue.
2. In your email account, open the email sent from our store and copy the six-digit verification code included in the email.
3. Go back to the online store and enter a six-digit verification code to log in.
4. Find and click on the order that you want to submit a return for.
5. If your order has more than one item, select only the items you want to return.
6. Select a return reason and add a note for the store if needed.
7. Click Request Return.
Once your return request is approved, you will receive an email with shipping instructions and a return shipping label.
QUESTIONS ABOUT RETURNS?
If you have any questions concerning our return policy, please contact us at:
