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  • Bikes
    CUSTOMIZE YOUR FAT BIKE, from $2,099
    Keystone ⚡ Class I Electric Fat Bike, from $6,199
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Assembled in CO Colorado

Making the Best Fat Bikes Since 2013

 (320) FAT-BIKE | (320) 328-2453
 SALE! 25% OFF NEW BIKES

Assembled in CO Colorado

Making the Best Fat Bikes Since 2013

HOME News

News

18
August

Keystone Review by Elevation Every Weekend

Elevation Every Weekend Keystone Electric Fat Bike Review
Borealis Fat Bikes Marketing
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Read More

 

18
August

Engearment Review: Borealis Keystone Fatbike E ...

Engearment Review: Borealis Keystone Fatbike E Bike - The Most Capable Lightweight Fatbike Ebike
Borealis Fat Bikes Marketing
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Read More

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★ Reviews

Let customers speak for us

118 reviews
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86%
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115
J
Keystone - Electric Fat Bike⚡
John Clark
Back on the trails

The Keystone is my first e-bike having been a fat tire mtb enthusiast this was a no brainer, it is the most fun I’ve had on a fat tire bike. Love it !! thanks Borealis.

User picture
R
Flume Custom - Aluminum Fat Bike
Rico Sanchez
Great bike

What a great bike, love how light weight it is and soooo smooth!

D
Crestone (Carbon) - NEW Frame Only Size XL Midnight Blue & Bronze
David Johnston
Beautiful frame and paint

Bought this xl frame to replace my 5 year old crestone. There was nothing wrong with my old one (had 13,000 + miles on it) but the blowout price on the xl was so good i had to buy it. paint is incredible.

J
Keystone - Electric Fat Bike⚡
Jim
Best eFat ever!

This is my third eFat and although I liked other two - the Keystone is just beyond. I set mine up with a Redshift ShockStop seatpost (hardtail with benefits!), Ergotec 45 degree by 50 stem, carbon riser bar, and Schwalbe Al Mighty 4.8 tires (328 Billy Flamingo studs per baby!) The T-type drivetrain blew me away so much I converted my other bikes.

I also received unbelievable service from the Borealis sales rep during purchase.

Simply heaven!

M
Borealis Flat Pedals (Alloy)
Mike Fagerness
Great!!

They are great for Mountain Biking!!

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