Borealis Flume Aluminum Fat Tire Bicycle
Borealis Flume Aluminum Fat Tire Bicycle
The Borealis Flume is an expedition-ready fat bike that is built to handle any adventure. With a lightweight 6000-series aluminum frame, it features a SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, and carbon handlebars and seat post. The durable Sun Ringle Mulefüt rims and your choice of tires provide maximum control and responsiveness, even in the toughest conditions. With clearance for tires up to 26x5” and 27.5x4.5”, and compatibility with 100-120mm of suspension travel, this fat bike is perfect for tackling mountains, glaciers, and deserts. With 2-3 bottle cage mounts, rear rack mounts, and Lizard Skin protectors, it's also equipped with all the extras you need for your next adventure. Contact us today to build your custom Flume!
Eagle 12 speed Flume Specs (1×12)
|Eagle NX||Eagle GX|
|Crankset||SRAM Eagle NX||SRAM Eagle GX|
|Crank Arms||175mm Alloy||175 Alloy|
|Rear Derailleur||RD ENX 1 x 12||RD EGX 1 x 12|
|Chain||KMC X12||KMC X12|
|Cassette||PG 1230 11-50||XG 1275 10-50|
|Shifters||SRAM Eagle NX||SRAM Eagle GX|
|Brakes||SRAM - Select||SRAM - Select|
|Chain Ring||SRAM 30T X-Sync|
|Frame||Borealis Crestone Carbon|
|Fork||Borealis Carbon Rigid Fork|
|Hubs||Borealis: Front 15×150 Rear 12×197|
|Rims||26" or 27.5" Sun Ringle Mulefut V2
|Spokes||Borealis Straight Gauge|
|Nipples||Borealis Silver Brass|
|Bar||Borealis Carbon Bar (35mm)|
|Stem||Borealis 50mm or 70mm|
|Post||Borealis Carbon Seatpost (31.6mm)|
|Bottom Bracket||SRAM DUB 100mm|
|DT/CS Protector||Lizard Skins|
|Weight||See weight calculator for exact weight.|
|EFFECTIVE TOP TUBE||23.02 in||24.02 in||24.8 in||25.59 in||585 mm||610 mm||630 mm||650 mm|
|SEAT TUBE CENTER TO TOP||15 in||17.01 in||19.06 in||21.02 in||381 mm||432 mm||484 mm||534 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||70 deg||70 deg||70 deg||70 deg||70 deg||70 deg||70 deg||70 deg|
|STANDOVER HEIGHT||Due to various rim and tire options stand over is not identified.|
|CHAINSTAY||17.91 in||17.91 in||17.91 in||17.91 in||455 mm||455 mm||455 mm||455 mm|
|BB DROP||2.36 in||2.36 in||2.36 in||2.36 in||60 mm||60 mm||60 mm||60 mm|
|REACH||16.04 in||16.65 in||17.22 in||17.76 in||407.3 mm||423 mm||437.5 mm||451.2 mm|
|STACK||23.50 in||24.05 in||24.61 in||25.16 in||597 mm||610.9 mm||625 mm||639.1 mm|
Finding the right size bicycle is important for a comfortable and enjoyable ride. There are various frame sizes available that are designed to fit riders of different heights, as well as different wheel sizes and frame styles. To choose the best fit, you can look at the sizing and geometry chart provided by the manufacturer. This will show you the seat tube length and top tube length, which can affect the stand-over clearance and comfort of the bike. You want to aim for a comfortable position that isn't too cramped or stretched out. If you have any questions about finding the right size bike for you, our team of experts is always happy to help.
| Child height (Inch)
Child height (cm)
||85-90 cm cm||10/12 inches|
|3’1”-3’3″||90-100 cm||12/14 inches|
|3’3”-3’7″||100-110 cm||14/16 inches|
|3'7"-3'8"||110-115 cm||16/18 inches|
|3’8”-4’0″||115-120 cm||18/20 inches|
|4'0”-4’5″||120-135 cm||20/24 inches|
|4'5"-4'9"||135-145 cm||24/26 inches|
|5 inches+||145 cm +||26 inches|
Adult height (Inch)
||Frame Size (Inches)||Frame size|
|4'10-5'2"||13 - 14"||X-Small|
|5'2-5'6"||15 - 16"||Small|
|5'6-5'10"||17 - 18"||Medium|
|5'10-6'1"||19 - 20"||Large|
|6'1-6'4"||21 - 22"||X-Large|
|6'4-6'6"||22 - 24"||XX-Large|
Adult height (Inch)
||Frame Size (Inches)||Frame size|
|5'2-5'6"||49 - 50 cm||X-Small|
|5'3-5'6"||51 - 53 cm||Small|
|5'6-5'9"||54 - 55 cm||Medium|
|5'9-6'0"||56 - 58 cm||Large|
|6'0-6'3"||58 - 60 cm||X-Large|
|6'3-6'6"||61 - 63 cm||XX-Large|
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