The echo is the first carbon fat bike frame ever to be designed specifically around the BLUTO fork. Fully guided internal dropper post routing. Fully guided internal cable routing. Clearance for 4.8” tires on 100mm rims.
Named after Echo Canyon in Dinosaur National Monument up in the northwestern boonies of Colorado, the echo is the first performance-oriented, full carbon frame designed around the brand new RockShox BLUTO fat bike suspension fork. The extreme lateral stiffness combined with geometry optimized for the BLUTO's 100mm of travel truly revolutionized fat biking. We also spec 35mm clamp stems and handlebars on our top two build kit models; this new oversized standard is a perfect match for the extra-wide tires of fat bikes. Internal dropper seatpost routing is the cherry on top of the echo's design features that make it stand out as a do anything, ride anywhere, year round adventure shredding machine. See the full specs for each build kit below.
The echo is the first carbon fat bike frame ever to be designed specifically around the BLUTO fork.
Photos may not reflect actual builds, please refer to specifications located on our website.
|Fork||Borealis Carbon Rigid Fork|
|Hubs||Borealis: Front 15x150 Rear 12x197|
|Rims||Borealis FTD80 Rims 80mm tubeless ready|
|Nipples||Wheelsmith Silver Brass|
|Rim Strips||Your choice of color|
|Tires||26x4.0" Schwalbe Jumbo Jim|
|Bar||Borealis Carbon 35 740mm|
|Post||Borealis Carbon 31.6mm|
|Crankset||Race Face Turbine or Aeffect with 30T chainring|
|Rear Derailleur||SRAM Eagle GX 12 Speed|
|Cassette||SRAM Eagle XG-1275 10-50T|
|Shifters||SRAM Eagle GX 12 Speed|
SRAM Level T or DB5 w Centerline 160/160
|DT/CS Protector||Lizard Skins|
Borealis offers four frame designs with unique fit and geometry to suit your every Fat Bike need. Begin by taking a rough size approximation on the chart below that is based on height, then select the corresponding bike with your fit needs by using the geometry chart further below. We recommend a similar fit to you mountain bike, so grab a measuring tape and dial it in.
Based on our research, riders at the heights below will usually take the corresponding frame size. If you’re at a transitional height that spans two sizes, look at the geometry chart to get the Stack and Reach you like based on other bikes you are comfortable on.
Stack and Reach are the fundamental fit elements, they are both measured relative to the bottom bracket. When choosing the Borealis that is right for you, it’s important to find a balance in these measurements to ensure the best performance.
|Effective Top Tube||23.23 in||24.02 in||24.72 in||25.55 in||590 mm||610 mm||628 mm||649 mm|
|Seat Tube Center to Top||15.00 in||17.01 in||19.06 in||20.98 in||381 mm||432 mm||484mm||533 mm|
|Head Tube||4.13 in||4.72 in||5.31 in||5.91 in||105 mm||120 mm||135 mm||150 mm|
|Seat Tube Angle||73 deg||73 deg||73 deg||73 deg||73 deg||73 deg||73 deg||73 deg|
|Head Tube Angle||69.8 deg||69.8 deg||69.8 deg||69.8 deg||69.8 deg||69.8 deg||69.8 deg||69.8 deg|
|Standover Height||Due to various rim and tire options stand over is not identified.|
|Chainstay||18.11 in||18.11 in||18.11 in||18.11 in||460 mm||460 mm||460 mm||460 mm|
|BB Drop||2.36 in||2.36 in||2.36 in||2.36 in||60 mm||60 mm||60 mm||60 mm|
|Reach||16.14 in||16.54 in||16.93 in||17.52 in||410 mm||420 mm||430 mm||445 mm|
|Stack||23.50 in||24.06 in||24.61 in||25.20 in||597 mm||611 mm||625 mm||640 mm|
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