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Borealis Flume Eagle GX

Borealis Flume Eagle GX
  • Color: Metallic Bronze & Blue
  • Color: Metallic Bronze & Blue
  • Color: Seafoam Green & White
  • Color: Seafoam Green & White
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With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready fatty mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy fat bikes on the market, but none with the Flume’s purebred heritage and durability.


-Traditional fat bike geometry is both responsive and nimble for variable conditions in snow or sand.
-Tire clearance up to 26x5” and 27.5x4.5”.
Compatibility for 100-120mm of suspension travel for increased comfort and control.
-Lightweight, 6000-series aluminum frame comes with 3 bottle cage mounts, rear rack mounts on seat stays and Lizard Skin protectors on both the down tube and drive-side chain stay.

Fat Bike Wheels That are as B.A.D. as it Gets

Make no mistake, HED’s aluminum variations of Big Deal fat bike wheels are as adventure and race-worthy as it gets. Inspired by the technology of HED’s Big Deal fat bike wheels, HED experts have crafted a set of fat bike wheels made for everyone.

At 80mm wide, Big Aluminum Deal wheels offer superb fit with all common fat bike tire sizes. They have the same patented Inflatobam tubeless technology as their carbon counterparts, which means you don’t even need rim tape to set these wheels up tubeless? That means you can save up to a pound of weight per wheel compared to other aluminum fat bike wheels on the market, just in tubes and rim tape!

Available in both 26? and 27.5? wheel diameter options, no other aluminum fat bike wheels offer the same combination of easy tubeless setup, stiffness, and jaw-dropping weight savings. Fast-rolling aluminum fat bike wheels are ready for your next adventure, dirt, gravel, snow and beyond, with HED’s Big Aluminum Deal wheels.


Frame Borealis Flume Alloy
Fork Borealis Rigid Carbon
Headset Borealis
Rims/Wheels MuleFut 26" x 80mm
Hubs Velocity Fat Disc
Tires 45NRTH Flowbeist/Dunderbeist
Crankset SRAM GX Eagle Alloy 175 30T
Bottom Bracket SRAM DUB
Chain KMC X12
Rear Derailleur SRAM EGX Eagle
Rear Cogs SRAM XG-1275 10-50
Shifters SRAM EGX Eagle
Handlebars Borealis Carbon 35mm
Tape/Grips Borealis
Stem Borealis
Brakes SRAM Level T
Saddle Borealis
Seat Post Borealis Carbon

* Subject to change without notice.


Borealis Fat Bikes

In 2013, Steve Kaczmarek started what is now the world leader in fat bikes: Borealis Fat Bikes. From the beginning, the goal was pretty simple: build the lightest, fastest, most technologically advanced fat bikes on the planet. We're still doing that today. This is who we are!

Part Numbers

Option MPN Store SKU
Metallic Bronze & Blue / Small 210000025100 210000025100
Metallic Bronze & Blue / Medium 210000025089 210000025089
Metallic Bronze & Blue / Large 210000025101 210000025101
Metallic Bronze & Blue / X-Large 210000025090 210000025090
Seafoam Green & White / Small 210000025095 210000025095
Seafoam Green & White / Medium 210000025096 210000025096
Seafoam Green & White / Large 210000025097 210000025097
Seafoam Green & White / X-Large 210000027169 210000027169