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Borealis Flume Eagle GX

Borealis Flume Eagle GX
  • Color: Seafoam Green & White
  • Color: Seafoam Green & White
$1,870.00 - $2,825.00
Color: Seafoam Green & White
Size: Select size
Please select options Unavailable


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.


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
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