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Borealis Bikes Yampa XX1 Complete Bike

$5,549.00

Item # BOR0002

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Item # BOR0002

Northern heavy.

While Borealis Bikes aren't exactly what we'd call light, the manufacturer's suggestive name is impossible to resist playing on. So we'll call the Yampa XX1 Complete Bike a northern heavy and call it good on the pun front. The inclusion of SRAM's flagship XX1 drivetrain means "heavy" doesn't translate to "slow" — just "fat." And in this case, "fat" means "ride virtually anywhere, on any surface, at any time of year."

The Yampa's frame is carbon fiber, which will only seem like an unnecessary luxury until you're stomping through boggy mud or snow-covered trails and every watt spent fighting frame weight and flex is one fewer directed into the trail. With an XC-worthy 1,270g of claimed weight, the frame itself isn't exactly a Clydesdale. The oversized chainstays certainly live up to the fat designation, though, with their girth contributing to efficient power transfer. The anorexic seatstays are decidedly not fat, which adds a bit of mechanical compliance to complement the Yampa's plush Surly tires and carbon's natural damping tendencies.

The Yampa's almost-comical 4.8in tire clearance warrants some pretty big hubs (190mm in the rear), so Borealis took matters into its own hands by building them itself. The fork is also Borealis, combining carbon fiber and a 15x135mm thru axle to take advantage of the frame's tapered head tube for stiff efficiency and confident tracking through muck. Despite its enthusiasm to apparently dabble in every aspect of its bikes, Borealis does finally yield the stage for rims (Surly), the cockpit (TruVativ and WTB), and the drivetrain (SRAM's revolutionary XX1).

  • Carbon fiber fat bike frame tips the scales at an XC-friendly 1,270 claimed grams
  • SRAM's XX1 makes for pro-tier, bombproof shifting for all your four-season adventures
  • Surly rims and tires make for a cushy, debris-clearing ride
  • Comically large maximum tire clearance of 4.8in

Tech Specs

Frame Material:
carbon fiber
Fork:
Borealis FF1
Headset:
Borealis
Shifters:
SRAM XX1 11-speed
Rear Derailleur:
SRAM XX1 11-speed
Crankset:
Race Face Turbine
Bottom Bracket:
Truvativ (100mm)
Cassette:
SRAM XX1 11-speed
Chain:
SRAM PC XX1
Rotors:
160 mm SRAM XX
Handlebar:
TruVativ Stylo Carbon T40
Grips:
Ergon GX-1
Stem:
TruVativ Stylo T20
Saddle:
WTB Rocket V
Seatpost:
TruVativ Stylo Carbon T40
Seat Collar:
Borealis
Hubs:
Borealis
Tires:
Surly Knard
Tire Size:
26 in / 3.8 in
Recommended Use:
sand, snow

Geometry chart

Borealis

Geometry Chart

 

Yampa
 

Seat Tube

(c-t)

Effective Top Tube

(eTT)

Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay

(CS)

S 15.0in 23.0in 4.3in 69.8o 73.0o 2.4in 18.2in
M 17.0in 23.8in 5.1in 69.8o 73.0o 2.4in 18.2in
L 19.1in 24.6in 5.9in 69.8o 73.0o 2.4in 18.2in
XL 21.0in 25.3in 6.5in 69.8o 73.0o 2.4in 18.2in

Reviews & Community

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Borealis Bikes Yampa XX1 Complete Bike

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Here's what others have to say...

5 5

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 gmcbride@backcountry.com

See ya out there!

Just in: Fat is Fast!
5 5

Fat Tire Fun!


had the opportunity to ride this bike at Outerbike in Moab this year and had an absolute blast on it. The bike was so light weight and agile i totally forgot i was riding a rigid fatbike. I was actually hammering alongside guys with regular mtn bikes.The XX1 is a nice addition to this bike. It shaves weight on the bike and you dont throw chains! According to Borealis this bike weighs in at 25 lbs without pedals-crazy for a fatbike. If you are in the market for something to ride over the winter months in the snow or in the sand this is definitely the fatbike to get!

Borealis does make an X01 version of this bike as well..hit me up for details


wbranham@competitivecyclist.com or 801-736-6396 x 4074 for questions

Wes


Fat Tire Fun!

What is the stand over height of the small and medium sized bike?

Responded on

Hello,

Thanks for the online question. Borealis doesn?t actually publish standover because this bike can be built with 3? tires, 4? tires, 5? tires or 29+ wheels so the standover will vary greatly. What?s your height and inseam and I would be happy to see what size should fit you best. It is a compact frame so standover shouldn?t be an issue for anyone.




5 5

Rowdy the Clown

  • Familiarity: I've used it several times

Rowdy the Clown rides a Borealis Yampa Fat Bike on the trails around Salt Lake City, UT. Who doesn't like a like a little clowning around on fatbikes?

5 5

amazingly fun!

  • Gender: Male
  • Familiarity: I've used it once or twice and have initial impressions

had the opportunity to ride this bike at Outerbike in Moab this year and had an absolute blast on it. The bike was so light weight and agile i totally forgot i was riding a rigid fatbike. I was actually hammering alongside guys with regular mtn bikes.The XX1 is a nice addition to this bike. It shaves weight on the bike and you dont throw chains! According to Borealis this bike weighs in at 25 lbs without pedals-crazy for a fatbike. If you are in the market for something to ride over the winter months in the snow or in the sand this is definitely the fatbike to get!

Borealis does make an X01 version of this bike as well..hit me up for details


*** e-mail me if you have questions wbranham@competitivecyclist.com


amazingly fun!

Wondering how hydro brakes will work in...

Wondering how hydro brakes will work in -20*?

Best Answer Responded on

About the same as the brakes in your car. DOT5 fluid works perfectly fine at -20F.

5 5

Expands What a Fatbike can Be.

  • Gender: Male
  • Familiarity: I've used it once or twice and have initial impressions

I rode the XX1 Yampa last weekend in Moab, and the combination of light weight and unreal traction made for fun times on steep slickrock. Deep sand was no problem either. Those huge tires may be as good in the desert as they are on the snow. A full-suspension trailbike with conventional 27.5 or 29 inch wheels will always be my primary dirt machine. But a quiver is good, and I had always thought a fatbike would make a good third or fourth mountain bike, with a light hardtail and a long-travel playbike ahead of it. After riding the Yampa, I would consider it a strong contender for the 2nd spot. For a lot of riders it could be a good year-round primary bike. I have customers riding fatbikes on Florida beaches, Mississippi river floodplains, Louisiana levees and tidal flats, as well as the expected Northern snowmobile trails. If you can think of somewhere where you ride where regular mountain bike tires tend to spin out or sink in, a fatbike is going to do better. And Borealis has addressed the weight and handling deficiencies of the tanklike steel fatbikes that came before.

Borealis Yampa

Responded on

Seems like it would be a great training bike building up your condition while having fun. then jump on your regular trail bike and enjoy it more then before with your new improved conditioning. Living in Az this would be a fun bike even without snow but could take it to Sedona in the winter for some winter fun as well.