Borealis Fat Bikes works with dealers across the country, find a dealer near you for the best pricing in your area!
The long fabled Echo model is an impressively equipped bike. The Echo carbon fiber frame has been combined with the stout 2×10 SRAM GX drive train. We then matched up the tubeless ready 65mm Turnagin rims to continue delivering an epic, comfortable ride, no matter what the conditions may be.
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.
- 100mm Bottom Bracket shell
- 42mm upper headset ID, 52mm lower headset ID
- New 197mm rear spacing with 12mm RockShox MAXLE thru axle.
- 3 water bottle cage mounts for those Epic Adventures
- Available in Stealth Black
- 1370 gram frame weight
- Ultra-stiff, fat, and rally-ready carbon frame
Bike comes with black hubs and black rim tape. Photos may not reflect actual builds, please refer to specifications located on our website.
|Frame||Borealis Echo (Black)|
|Fork||Borealis Rigid Carbon Fork or Bluto RL|
|Hubs||Borealis. Front 15×150 Rear 12×197|
|Rims||Borealis FTD 65|
|Spokes||Wheelsmith Black Straight|
|Nipples||Wheelsmith Silver Brass|
|Tires||Surly Knard 3.8|
|Bar||Truvativ T20 Alloy|
|Post||Truvativ T20 Alloy Post|
|Crankset||Race Face Turbine 2X|
|Rear Derailleur||SRAM GX 10 speed|
|Chain||KMC 10 SP|
|Shifters||SRAM GX 10 Speed|
|Brakes||SRAM Level T w/160mm rotors|
|DT/CS Protector||Lizard Skins|
|Weight||~29lbs 10oz +2lbs for Bluto|
GEOMETRY & SIZING
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.
RIDER HEIGHT RECOMMENDATIONS
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|