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Borealis Bikes Echo XX1 Complete Fat Bike - 2016


Item # BOR000B

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  • Black/Blue, M ($5,999.00)
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Item # BOR000B

Next level fat.

It seems counterintuitive, but the Borealis Echo XX1 Complete Fat Bike has us thinking that fat bikes and suspension aren’t such a strange combination. The Echo was built as a perfect partner to the RockShox Bluto suspension fork, and saying it adds even more fun to the equation doesn’t really do it justice. So why not add to the party SRAM’s proven XX1 one-by-eleven groupset? The result is a setup that’s race-light, and ready to tear up the trails.

Borealis built the Echo frame by pairing cutting-edge carbon fiber construction methods with geometry that’s been optimized for the RockShox Bluto — the world’s first dedicated fat bike suspension fork. Beyond shedding grams, the composite construction has enabled Borealis to finely tune the ride quality, resulting in a strong frame that will hold up to heavy use. That’s particularly important, since the addition of the 80mm travel Bluto invites even more aggressive riding than the already surprisingly capable Yampa.

The profiling of the seatstays enables a degree of vertical compliance, while the oversized chainstays keep the pedaling responsive when you stomp on the gas. Like the Yampa, the Echo clears massive 4.8 inch tires on a 100mm wide rim. To achieve that degree of clearance, Borealis has relied on another industry first, namely a 197mm-spaced rear hub, which is secured by a Maxle quick release thru-axle. The result is a dishless rear wheel, a surprisingly stiff rear end, and perfect drivetrain alignment with the 100mm threaded bottom bracket shell. Additionally, it provides enough clearance for a one- or two-by drivetrain, regardless of your tire choice. Naturally, there's plenty of extra clearance for mud, snow, or anything else you're likely to find yourself riding through. The head tube is tapered, which takes advantage of the incredible stiffness provided by the Bluto. It's equipped with three bottle cage mounts, to keep you hydrated for long hours in the saddle. And at 1370 grams for a medium frame, it’s far lighter than it appears.

Of course, the Echo frame is mated to a RockShox Bluto suspension fork. SRAM's XX1 one-by-eleven drivetrain got the nod for the XX1 build. The crankset is a featherweight Race Face Next SL setup. These Canadian-built beauties are by far the lightest fat bike-ready crankset on the market, and they’re paired with a 32t narrow-wide chainring for flawless chain retention without the need for a chainguide. SRAM XX brakes handle stopping duties, and the cockpit is primarily Race Face Next hardware with a WTB saddle. The wheels are Borealis's own hubset, featuring a 197mm quick-release thru-axle out back, and a 150mm 15mm quick-release thru-axle front hub. They're laced with stainless spokes to Turnagain FR80 rims, wrapped in 4 inch wide 45 North Husker Du tires, for a versatile, reliable setup.

The Borealis Echo XX1 Complete Fat Bike is available in four sizes, from Small to X-Large, and in the colors Black and Black/blue.

  • Full carbon fiber frame paired with RockShox Bluto suspension fork
  • Three water bottle mounts
  • 197mm rear spacing and 150mm front spacing allow for super-strong, dishless wheels

Tech Specs

Frame Material:
carbon fiber
RockShox Bluto
Front Travel:
80 mm
SRAM XX1 11-speed
Front Derailleur:
Rear Derailleur:
SRAM XX1 11-speed
32 t Race Face Next SL
Bottom Bracket:
Race Face
SRAM XX1 XG-1199
160 mm SRAM
Race Face Next 35
Handlebar Width:
760 mm
Lizard Skin Peaty lock on
Race Face Atlas 35
Stem Length:
65 mm
WTB Pure V Race
Race Face Next SL
Seat Collar:
Borealis FH150
45N Husker Du
Tire Size:
26 in x 4 in
not included
Claimed Weight:
[frame, medium] 1370 g
Recommended Use:
sand, snow

sizing chart

Echo size by rider height


Geometry chart


Geometry Chart



Seat Tube


Effective Top Tube


Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop




S 15in 23.2in 4.1in 69.8o 73o 2.4in 18.1in
M 17in 24in 4.7in 69.8o 73o 2.4in 18.1in
L 19.1in 24.7in 5.3in 69.8o 73o 2.4in 18.1in
XL 21in 25.6in 5.9in 69.8o 73o 2.4in 18.1in

Reviews & Community


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So Much Fun!

    I recently had the opportunity of riding this bike in Moab and had an absolute blast! Ive been on fatbikes in the past and found them to be heavy and sluggish-but not this bike. The bike comes in around 28.5 lbs and was extremely agile on the trail and the more traditional mtn bike geometry made the bike feel very balanced and at times I forgot i was on a fatbike. The frame is just stiff enough to allow impressive handling in spite of the big tires. The nicest feature of the bike is the Rockshox Bluto fork. its lightweight, simple to use and really expands the abilities of the bike allowing you to take it places you have only dreamed about on a fatbike. It actually feels like it has 5-6 inches of travel allowing you to maneuver over the trickest terrain with ease. Probably the coolest feature of the bike is its ability to run a 29+ wheelset (available through Borealis). it makes the bike very versatile allowing you to swap out the wheels for a skinnier version for the hot,dry summer months and swap back to the fat wheels for the mud and snow season. It like having 2 bikes! so to sum it up this bike is an absolute blast to ride and highly recommended. It sure kept a smile on my face :)

    If you have any questions about the bike feel free to contact me direct. My email address is or 801-736-6396 x 4074.
    I can order the 29+ wheels as well.

    So Much Fun!

    Amazing Bike bad wheels

    • Familiarity: I've put it through the wringer

    The bike is just amazing, light, stiff, handles well, great shock absorption from the carbon frame. The only beef I have with Borealis is their use of their in house branded wheels as you will see online from other professional reviewers. The Turnagain wheels are heavy, outdated technology and will not run tubeless no matter what I have tried. I do like the hubs. I had built up a set of 29+ wheels and ride that set most of the time due to the fear of pinch flatting the Fat Tires out in the desert where I mostly ride. I guess if you mainly ride snow the Turnagain wheels would be fine since tubes in the snow wont matter. Other than that I think this is one of the best mountain bikes I have owned. I am in the process of buying a carbon set of 26 Fat rims for tubeless set up. Seriously consider your terrain and whether you want to use tubeless or not because the factory wheels just plain suck. The bike with Velocity Dually 29+ mid fat tires just screams and eats everything. The ride feels exactly like my Santa Cruz 5010 cc. Very expensive bike and worth it but for god sake figure out the tubeless issues or contract with HED for the carbon tubeless Fat Bike rims.

    Avg. ride time: 8m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    True one bike quiver...Seriously

    • Familiarity: I've put it through the wringer

    I sold a Nomad Carbon to get a fatty and it was the best decision I've made. Long story short, yes you can do anything that your friends can do... Except when their tires sink in, you can keep on going. I've ridden places in Southern Utah randomly following washes that I'm certain no human as ever been before. And I owe it all to this little gem. If you have any questions or want to hear me go off on the best bike ever, email me at

    Just in: Fat is Fast!

    • Familiarity: I've used it several times

    Wow, that was New and unexpected. Just slayed a night ride on our demo rig, umm wow. I am blessed to be able to try and ride the best of the best. I currently rock a Pivot Mach 6 27.5 and am pretty enthusiastic about it. However this brought back that first feeling of aww I had when I first started working in shops. It was New, different , and inspiring. Who needs suspension , it takes a lot of maintenance. This feels like that, has better traction, is laterally responsive for the climbs, and you just point and shoot and it delivers.

    Crazy fun, totally want one, with some minor additions. A dropper post is a must, and it would be nice having larger rotors, 180 would do the trick. As mentioned already it is worth getting the 29+ wheels for faster rides. But the enjoyment of the super cushy big fat tires is just rad, so depends on your riding style.

    Feel free to contact me directly should you want to make any of these changes and get one on order! 801.736.6396 x 4769 Or

    See ya out there!

    Just in: Fat is Fast!