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2024 Borealis

Flume Select

A 26″ aluminum frame rigid fat bike with upper mid-range components.
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Manufacturer Price

$1,699
Weight30.0 lbs  
FrameAluminum
SuspensionRigid
ForkCarbon
Wheels26″ Aluminum
Drivetrain1 × 12
GroupsetNX
BrakesSRAM Level T Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Flume Select
Other Fat bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

21 mph

Flume Select

23 mph

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Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full Flume model range

View Comparison
Sizing
SM

5'2" – 5'6"

MD

5'5" – 5'10"

LG

5'9" – 6'3"

XL

6'0" – 6'6"

🐐 Estimated

Rider Fit Notes

None yet.

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Geometry
Specs
Build
Frame

Flume (Aluminum)

BB StandardBSA, 100mm, Threaded

ColorsMatte Black with Gloss Yellow Graphics; Gloss Crimson Red with Gold Graphics

Fork

Borealis Rigid Carbon 51mm Offset

Bottom Bracket

SRAM DUB Threaded 100mm

Headset

FSA

Stem

Borealis 50mm x 35mm

Handlebar

RaceFace NEXT SL 740x10mm OR Borealis Carbon (based on supply)

Saddle

Borealis

Seatpost

Borealis Carbon 31.6x400

TypeRigid

Grips

Borealis

Groupset
Rear Derailleur

SRAM Eagle NX 12-Speed

Crank

SRAM Eagle NX Alloy 175mm w/ SRAM X-SYNC 30T

Shifters

SRAM Eagle NX 12-Speed

Cassette

SRAM PG-1230 11-50T

Chain

SRAM EAGLE GX

Brakes

SRAM Level T 2-Piston Hydraulic with SRAM Centerline 160mm Rotors

TypeSRAM Level T Hydraulic Disc

Wheels
Rims

Sun Ringle Mulefut V2 27.5x65

Spokes

Borealis Straight Gauge

Front Hub

Borealis GEN 4 Black 15x150 Front / 12x197 Rear

Rear Hub

Borealis GEN 4 Black 15x150 Front / 12x197 Rear

Tires

Maxxis Minion FBF/FBR 27.5x3.8

Rider Notes
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First added July 16

Last updated August 31

Not listed for 636 days