borealis Flume Ultimate 2023
2023 Mountain
Estimate price |
2,419$
Weight | 14.97 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 26" -
Travel Front 100mm -
Fork RockShox Bluto RL
-
Groupset GX -
Suspension Hardtail -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
157cm - 167cm
MD
165cm - 177cm
LG
175cm - 188cm
XL
185cm - 195cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Flume (Aluminum)
Suspension Fork
RockShox Bluto RL 100mm
Drivetrain
Rear Derailleur
SRAM Eagle GX 12-Speed
Shift Levers
SRAM Eagle GX 12-Speed
Cassette
SRAM XG-1275 10-52T
Crank
SRAM Eagle GX Alloy 175mm w/ SRAM X-SYNC 30T
Bottom Bracket
SRAM DUB Threaded 100mm
Chain
SRAM EAGLE GX
Wheels
Front Hub
Borealis GEN 4 Black 15x150 Front / 12x197 Rear
Rear Hub
Borealis GEN 4 Black 15x150 Front / 12x197 Rear
Rims
Sun Ringle Mulefut V2 27.5x65
Spokes
Borealis Straight Gauge
Tires
Maxxis Minion FBF/FBR 27.5x3.8
Brakes
Brakes
SRAM G2 RS 4-Piston Hyrdraulic with SRAM Centerline 180/160mm Rotors
Cockpit
Stem
Borealis 50mm x 35mm
Handlebar
RaceFace NEXT SL 740x10mm OR Borealis Carbon (based on supply)
Grips
Borealis
Headset
FSA
Seat
Saddle
Borealis
Seatpost
KS Lev Integra w/ Southpaw Lever 125mm (SM, MD) or 150mm (LG, XL) travel
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.47 mm | 1.45 mm | 1.43 mm | 1.42 mm |
| Bottom Bracket Height | 283 mm | 283 mm | 283 mm | 283 mm |
| Stack | 595 mm | 609 mm | 623 mm | 637 mm |
| Reach | 405 mm | 421 mm | 436 mm | 449 mm |
| Top Tube Length | 583 mm | 608 mm | 628 mm | 648 mm |
| Seat Tube Angle | 73 ° | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 381 mm | 432 mm | 484 mm | 534 mm |
| Head Tube Angle | 70 ° | 70 ° | 70 ° | 70 ° |
| Head Tube Length | 105 mm | 120 mm | 135 mm | 150 mm |
| Chainstay Length | 453 mm | 453 mm | 453 mm | 453 mm |
| Bottom Bracket Drop | 60 mm | 60 mm | 60 mm | 60 mm |
| Wheels | 26" | 26" | 26" | 26" |
| Rider Min Height | 157 cm | 165 cm | 175 cm | 185 cm |
| Rider Max Height | 167 cm | 177 cm | 188 cm | 195 cm |
Model Overview
Flume Ultimate is part of the Borealis Flume model. Borealis released 8 bikes variations of this model so far. Take a sneak peek at all Borealis Flume bikes models from 2023, by clicking here.
Model range prices
The most economical model, the Borealis FLUME EAGLE CUSTOM BUILD 2023 has a starting price of 1499$. Borealis Flume Elite 2023 on the other hand is the most expensive at 2949$.
Safety
Your safety should be the top priority when you go for a ride. In short, make sure that you always use a helmet, high visibility clothing, and proper lights when riding at night-time.
Fatbike bikes average price
According to our math, the average price for a trustworthy Fatbike bike is 1743$. However, this doesn’t mean that if you spend less money on a Fatbike bike, you couldn’t get a decent one. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
Furthermore, if we have a quick look at this model’s cost, we can see that at its release date the price was 2419$. If we compare this with the average Fatbike bike cost we notice that the price is 38.78% more expensive.
Average weight for Fatbike bikes
Fatbike bikes have an average weight of 14.42 kg (31.79 lbs). Having an easier bike than average will give you a great advantage on climbs. However, a heavier bike will gain more speed on descends.
Weighing 14.97 kg (33 lbs), the Flume Ultimate model is slightly heavier than average. To sum up, it’s 3.81% heavier than the average weight of Fatbike bikes.
Flume Ultimate components
Fork
The Flume Ultimate comes factory-installed with the RockShox Bluto RL fork. This has a travel range of 100mm. Bike forks absorb the shocks and give you a smooth and pleasant ride. In short, you should always ensure you have a good fork when purchasing a bike.
Wheels size
The Flume Ultimate 2023 bike is equipped with 26″ aluminum wheels when leaving the factory. The 26″ wheels are lighter than the 27.5 or 29″ wheels. However, they are less forgiving when riding over obstacles such as bumps and roots.
Brakes
When you want to stop the bike in time, the brakes are vital. The Flume Ultimate has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, you can ride your bike with confidence.
Sizes
Borealis Flume Ultimate bike has 4 sizes, in the range of 157 cm – 195 cm (5.15 ft – 6.4 ft). In conclusion, it won’t take much to find one that’s right for you.
Dropper post
Every bike should have a dropper post, and this one does. A dropper post is a must-have these days if you’re riding anything remotely technical. The main benefit of a dropper post is increased safety while riding. As mentioned above, the lever system allows you to quickly move the saddle out of the way when approaching descents or trail obstacles.