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 |
About this model
Flume Ultimate is part of the Borealis Flume model. Borealis launched 8 bikes of this model so far. Check out the entire range from 2023 of this model, by clicking this link.
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 is a top priority so always wear a helmet when you ride your bike. Moreover, wear the right clothing. You want to be visible to other drivers, so avoid wearing dark clothing.
Average price for Fatbike bikes
If you want to purchase a solid Fatbike bike, it is important to know that the average cost is 1743$. However, this doesn’t mean that if you spend less money on a Fatbike bike, you couldn’t get a decent one. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
This bike was released in 2023 and its price was 2419$. If we compare this with the average Fatbike bike cost we notice that the price is 38.78% higher.
Average weight for Fatbike bikes
The average weight for Fatbike bikes is 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.
slightly heavier than average, Flume Ultimate has a weight of 14.97 kg (33 lbs). In other words, this model is 3.81% heavier than the average Fatbike bike.
Overview of components
Fork
The fork installed on this bike is the RockShox Bluto RL model. The travel on this model is 100mm. Bike forks are good shock absorbers and provide a smooth ride and a great experience. To sum it all, when buying a bike, ensure that you look for a fork capable of decent travel.
Wheels size
The wheels on Flume Ultimate are the 26″ aluminum type. Being a little smaller, these wheels will fit both small and tall riders. However, you will need increased suspension than in the case of 29″ wheels.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, your safety is in good hands.
Sizes
There are 4 sizes available for this model. Rider height can be anywhere between 157 cm – 195 cm (5.15 ft – 6.4 ft). In short, you can easily find one that suits you.
Dropper post
Borealis Flume Ultimate includes a dropper post. 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.