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2016 21" SKU: BMT22659

Borealis Flume Fat Bike - 2016, 21"

Recommended Rider Height: 6'2" - 6'5" Size Guide
Regular price

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shipping icon $94.99 RideFast Shipping

- New bottom bracket for smooth pedaling.
- New X-Fusion Manic dropper w/ 150mm of travel.
- New rear shifter cable/housing for crisp shifting.

Master Mechanic's Notes:
- Moderate scratches on the fork lowers & stanchions.
- Light scratches on the brake levers.
- Moderate scratches on the front & rear triangle.
- Moderate scratches on the crank arms & rear derailleur.
- Light dings on the rear rim.

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TPC Guarantee

This bike passed a 141-point inspection and received a full pro-tune by our Master Mechanics in our Certified Pre-Owned process. CPO bikes are pristine and ready to ride!

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30-Day Hassle-Free Returns

Shop with confidence. Every bike is covered by our 30-day satisfaction guarantee. If this bike isn’t perfect for you, get in touch and we’ll help you find the right bike.

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RideFast Shipping

Bikes ship in our custom RideFast box, and assembly is incredibly simple. Most novice riders can assemble their bike in 5 minutes or less. The tools you need to assemble are also included.

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Year 2016
Brand Borealis
Model Flume
Size 21"
Frame Material Aluminum
Drivetrain SRAM, 1x12 spd
Weight 31 lbs 13 oz
Fork RockShox Bluto RL
Fork Travel 100mm
Brakes SRAM Guide R, Disc - Hydraulic
Shifters SRAM GX Eagle, Mechanical
Rear Derailleur SAM GX Eagle
Bottom Bracket Shell Threaded
Crankset SRAM GX Eagle Alloy, 32t, 175mm
Cassette SRAM XG-1275 Eagle , 10-50t
Chain SRAM
Handlebar Borealis Carbon, 700mm
Headset FSA Integrated
Stem Promax S-35 Alloy, 35.0mm x 40mm, 0°
Seatpost X-Fusion Manic, 30.9mm
Seatpost Travel 150mm
Saddle Ergon
Front Axle Spacing 15x150mm (Thru-Axle)
Rear Axle Spacing 10x190mm
Wheelset HED Big Deal Disc Aluminum Tubeless Compatible, HED
Front Tire Terrene Cake Eater Light, 26" x 4.6"
Rear Tire Terrene Cake Eater Light, 26" x 4.6"
Tire Type Tubeless
Tubeless Compatibility Bike ships tubeless


Recommended Rider Height 6'2" - 6'5"
a. Effective Top Tube 650 mm
b. Seat Tube 534 mm
c. Seat Tube Angle 73°
d. Head Tube Angle 70°
e. Head Tube 150 mm
f. Stack 639.1 mm
g. Reach 451.2 mm
h. Standover Height 808 mm
i. Saddle Height Range N/A

“I love this company! My beautiful bike arrived promptly, was packed brilliantly, and tuned perfectly. It was exactly as described.”

— Kari K.


“In the past month, I purchased a road bike and MTB from TPC. Very happy with the price and condition of both bikes! I was riding the bikes 10 minutes after I received them.”

— David H.

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