The Flow EX3 is the most reliable tubeless rim made for handling faster speeds on the most demanding trails. If you’re looking for the ultimate rim for enduro and DH racing, or just the most durable rim possible, this is the one. The Flow EX3 combines the 29mm internal width and durable 6069 aluminum construction of the Flow MK3 with the incredibly strong triple cavity design of the classic Flow EX rim. The result is a new rim shape that perfectly balances radial compliance with lateral stiffness and sets an entirely new benchmark for durability and impact resistance.
The Flow EX3 rear wheel includes the Neo OS rear hub and Sapim’s high-quality D-Light spokes and Secure Lock alloy nipples. D-Light spokes help keep rotating mass to a minimum while still offering exceptional strength, and Secure Lock nipples use a mechanical lock to resist loosening. The Neo OS rear hub rolls on a chromoly axle for increased durability and includes a Durasync freehub with simultaneous 6-pawl engagement.
The Flow EX3 rim’s Tiebeam inner bridge lets it withstand impacts that would deform most rims to the point of air loss and structural failure. Even if you use a tire insert, huge impacts can cause the sidewall of most rims to fold, causing air loss and eventual failure. But the Tiebeam brace and patented low sidewalls of the Flow EX3 resist this folding, maintaining air pressure and structural integrity better than any other rim. Combined with the added durability of 6069 aluminum and WideRight 29mm inner width optimized for 2.35” to 2.8” tires, the Flow EX3 is the evolution of the Flow line for aggressive riding. Every World Cup DH and Enduro World Series win, every hour of testing, riding, and improving, it’s all here in the Flow EX3.
- Patented low-profile tubeless rim design balances lateral stiffness with radial compliance
- Designed, tested, and raced to victories on the World Cup DH and Enduro World Series circuits
- Tiebeam triple-cavity rim design resists damage and prevents air loss under impacts
- 29mm internal width optimized for 2.35” to 2.8” Trail, All-mountain, and DH tires
- Most trusted tubeless system for easy setup and low maintenance
- Neo OS hubs designed to handle the added loads and durability needs of Enduro and DH racing
- Sapim D-Light spokes in easily replaced, standard J-bend lengths and Secure Lock alloy nipples
- 6069 aluminum alloy is stronger than conventional 6061 alloys
- Bead Blasted “BBQ” finish for added durability
- Tubeless ready! Includes rim tape and valves installed
Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right part the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!
We currently offer both economy and expedited shipping options though FedEX and USPS.
Orders totaling over $49 are eligible to ship for free via an economy ground option of our choice.
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.
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.
All returns must be requested within sixty (60) days of the fulfillment date (i.e. the date we printed the shipping label and boxed up your order.) All returned items must be received in new and unused condition, with the original tags and labels attached, and in the original packaging. We cannot accept returns on any items that have been installed or show wear of any kind.
To request a return, please visit: returns.thundermountainbikes.com and follow the steps to return eligible items from your order.
After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. We will notify you by email when your return has been processed.
For all Special Order items, there is a 25% restocking fee. Special Order items are those that we do not currently stock.
For defective, damaged, or if we sent you the wrong products, please contact us using the phone number or email below.
If you have any questions concerning our return policy, please contact us at: