HIGHLIGHTS
- Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, rigid carbon fork, carbon handlebars, carbon seat post, durable Sun Ringle Mulefüt rims and your choice of tires.
- Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
- Tire clearance up to 26x5” and 27.5x4.5”.
- Compatibility for 100-120mm of suspension travel for more technical riding.
- Lightweight, durable carbon fiber frame comes with internally routed cables, 2-3 bottle cage mounts and lizard skin protectors on both the down tube and drive-side chain stay.
WHEELS & TIRES
- All bikes come standard with tubes.
- If you order rim tape with your Mulefut rims, we will tape the rims and install the tires with tubes.
- HED Alloy and HED Carbon rims do not require rim tape for tubeless set up.
- Tubes must be removed and tubeless valves installed for tubeless set up. We recommended to have this completed by a professional bicycle mechanic.
BUILD SPECS
Frame | Flume (Aluminum) | |||
Fork | Borealis Carbon Rigid Fork Standard Option | |||
Bottom Bracket | SRAM DUB 100mm | |||
Crankset | SRAM Eagle NX Alloy 175mm w/ SRAM X-SYNC 30T | SRAM Eagle GX Alloy 175mm w/ SRAM X-SYNC 30T | SRAM Eagle X0 Carbon 175mm w/ SRAM X-SYNC 30T | SRAM Eagle XX Carbon 175mm w/ SRAM X-SYNC 30T |
Rear Derailleur | SRAM Eagle NX 12 Speed | SRAM Eagle GX 12 Speed | SRAM Eagle X0 12 Speed | SRAM Eagle XX 12 Speed |
Chain | Eagle GX | Eagle GX | Eagle GX | Eagle XX Gold |
Cassette | PG 1230 11-50 | XG 1275 10-52 | XG 1295 10-52 | XG 1299 10-52 Gold |
Shifter | SRAM Eagle NX | SRAM Eagle GX | SRAM Eagle GX | SRAM Eagle GX |
Brakes | SRAM Level T 2-piston OR SRAM G2 RS 4-Piston Hydraulic | |||
Rotors | SRAM Centerline 160mm | |||
Headset | FSA | |||
Hubs | Borealis GEN 4 Black 15x150 Front / 12x197 Rear | |||
Rims | Sun Ringle Mulefut V2 26x80 or 27.5x65 | |||
Spokes | Borealis Straight Gauge | |||
Nipples | Borealis Silver Brass | |||
Tires | Your Choice | |||
Bar | Borealis Carbon 35x760mm | |||
Stem | Borealis 50mm | |||
Post | Borealis Carbon 31.6x400mm | |||
Saddle | Borealis | |||
Grips | Ergon GP10 | |||
DT/CS Protector | Lizard Skins | |||
Weight | See weight calculator for estimated weight. |
GEOMETRY CHART
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.
S | M | L | XL | |
EFFECTIVE TOP TUBE | 585 mm | 610 mm | 630 mm | 650 mm |
SEAT TUBE CENTER TO TOP | 381 mm | 432 mm | 484 mm | 534 mm |
HEAD TUBE | 105 mm | 120 mm | 135 mm | 150 mm |
SEAT TUBE ANGLE | 73 deg | 73 deg | 73 deg | 73 deg |
HEAD TUBE ANGLE | 70 deg | 70 deg | 70 deg | 70 deg |
STANDOVER HEIGHT | Varies based on wheel and tire size | |||
CHAINSTAY | 459 mm | 459 mm | 459 mm | 459 mm |
BB DROP | 60 mm | 60 mm | 60 mm | 60 mm |
REACH | 407 mm | 423 mm | 438 mm | 451 mm |
STACK | 597 mm | 611 mm | 625 mm | 639 mm |
ASSEMBLY
There is some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. A multi-tool will be included with your order that has all tools necessary to assemble the bike, with the exception of a torque wrench. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly. Below is a video showing the remaining assembly once you receive the bike. Tires will be set up with tubes. Tubeless rim tape and valves are included on the side.
OWNER'S MANUAL
COMPATIBILITY
- Rockshox Bluto Fork tire size limitations: 26x5” or 27.5x4”
- Mastodon Pro EXT Fork tire size limitations: 26x5” or 27.5x4.5”
- Borealis Rigid Carbon Fork tire size limitations: 26x5” or 27.5x4.5”
- Dually 29x45 and 27.5x45 Rims – Max tire width: 3”
- All rims 65mm to 85mm wide are compatible with tire widths of 3.8” to 5”
- HED Carbon 100mm Rims – Max tire width of 4.6”
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Customer Reviews
This bike is so much fun! There are so many ways you can ride it, I can’t wait to try them all! The color looked even better in person(green). As soon as I got everything together it was so well tuned that the gears shifted flawlessly first try. it was a bit more work to put together than I anticipated but I think that’s mostly because I ordered the Manitou Fork and they installed the front brake stuff on the borealis fork that it also came with and the instruction video didn’t cover anything about installing the manitou fork and subsequently swapping the brakes over to it. I was able to get it done but it definitely added a good chunk of time to the job. like I said though once it was all together the bike performed amazingly and I can’t wait for the first snow! Also their shipping was super fast they’re super on top of getting it shipped out. I’ll be back to get a full wheelset for my summer wheels/tires in the spring! Thank you!
I recently bought a fully loaded Crestone and it is by far my favorite bike yet. I have rode it in many different conditions and it’s a blast to ride. Not the fastest bike I own but the most fun.
I have only ridden my Crestone a couple of times, to date. The rides have been on dirt. So far, I am very impressed with the bike. I am looking forward to riding on the snow. The quality of the bike is very apparent. I also have a Yampa, so I expected the bike to be top notch. Thank you for taking care of me!
Went to a local bike shop where I was able to test ride a fat bike (been on the fence about getting one). Salesman was super informative. Advised me to go to the website and build what I wanted. Easy process. Quick delivery. Nice looking bike. Smooth ride.
I received my new Borealis bike, it came in 2 boxes and was easy to assemble with the tool that came with the bike. I have been riding the trails every day! It is so light weight and handles beautifully around the turns. Plus its gorgeous!!