Niner SIR 9 – 4-Star X01 Eagle – 27.5+ 2019
2019 Mountain
Estimate price |
5,200$
Weight | 11.6 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Steel -
Wheels 27.5" / 29" -
Travel Front 120mm -
Fork Fox Factory Float 34
-
Groupset X01 Eagle, X1 -
Suspension Hardtail -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
158cm - 171cm
SM
158cm - 171cm
MD
168cm - 180cm
MD
168cm - 180cm
LG
178cm - 189cm
LG
178cm - 189cm
XL
186cm - 199cm
XL
186cm - 199cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Reynolds 853 air hardened steel, welded
Suspension Fork
FOX 34 SC FLOAT FACTORY FIT4 EVOL, 3 POSITION W/ ADJ, KASHIMA COAT, 120MM, 110X15MM, 51MM OFFSET
Rear Shock
N/A
Drivetrain
Rear Derailleur
SRAM X01 EAGLE 12SP
Front Derailleur
N/A
Shift Levers
SRAM X01 EAGLE 12SP
Cassette
SRAM EAGLE XG 1295, 10-50T
Crank
SRAM X1 EAGLE CARBON DUB 32T CNC RING
Bottom Bracket
73mm PF30 BB Shell (Adapters Required For BSA Type BBs); compatible with Biocentric 30 BB
Chain
SRAM X01 EAGLE 12SP
Wheels
Rims
Boost 12x148mm
Tires
MAXXIS MINION DHF 3C/EXO/TR 29x2.5 or REKON+ DC/EXO/TR 27.5x2.8
Brakes
Brakes
SRAM GUIDE RSC
Brake Levers
SRAM GUIDE RSC
Disk Rotors
180/160 SRAM CENTERLINE ROTORS
Cockpit
Stem
RACE FACE TURBINE R 40MM, 35MM CLAMP
Handlebar
RACE FACE NEXT R 800MM WIDE, 20MM RISE, 35MM CLAMP
Grips
NINER GRRRIPS L/O FLANGED
Headset
NINER INTERNAL ZS SHIS DESCRIPTION ZS44/28.6|ZS56/40
Seat
Saddle
NINER CUSTOM TR WITH CRN-TI RAILS, PRINTED NINER GRAPHIC
Seatpost
KS LEV INTEGRA
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | SM | MD | MD | LG | LG | XL | XL |
|---|---|---|---|---|---|---|---|---|
| Wheels | 27" | 29" | 27" | 29" | 27" | 29" | 27" | 29" |
| Rider Min Height | 158 cm | 158 cm | 168 cm | 168 cm | 178 cm | 178 cm | 186 cm | 186 cm |
| Rider Max Height | 171 cm | 171 cm | 180 cm | 180 cm | 189 cm | 189 cm | 199 cm | 199 cm |
Model Overview
SIR 9 – 4-Star X01 Eagle – 27.5+ belongs to the Niner Sir model. Niner launched 44 bikes of this model so far. You can get a glimpse at all models from 2019, by clicking on this link.
Model range prices
Niner SIR 9 – 2-Star NX Eagle – 27.5+ 2019 is the cheapest bike model and costs 2600$. Niner SIR 9 – 5-Star X01 Eagle – 29 2019 is the most expensive one and costs 6500$.
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.
Average price for Trail bikes
If you want to purchase a solid Trail bike, it is important to know that the average cost is 2762$. However, you could also get a good Trail bike even if you pay a lower amount than the average price. As a general rule of thumb, you should always read reviews about the bike and its components before buying it to ensure you don’t pay too much.
Furthermore, if we have a quick look at this model’s cost, we can see that at its release date the price was 5200$. Doing a quick comparison, we notice that SIR 9 – 4-Star X01 Eagle – 27.5+ price is 88.27% higher than the average cost of a Trail bike.
Average weight for Trail bikes
On a deeper look, we notice that the average weight of a Trail bike is 12.98 kg (28.62 lbs). It is a good advantage to have a lighter bike than the average. However, a heavier bike is more efficient on descents.
Niner SIR 9 – 4-Star X01 Eagle – 27.5+ it’s weighing 11.6 kg (25.57 lbs). At this weight, is considerably lighter than average. In short, the average Trail bike weight is 11.9% higher than this one.
Overview of components
Fork
The SIR 9 – 4-Star X01 Eagle – 27.5+ comes factory-installed with the Fox Factory Float 34 fork. This has a travel range of 120mm. Bike forks are good shock absorbers and provide a smooth ride and a great experience. To sum up, when buying a bicycle, make sure you get a fork that is capable of delivering decent travel.
Wheels size
When leaving the production line, the SIR 9 – 4-Star X01 Eagle – 27.5+ model has 27.5″ aluminum wheels. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, the overall traction of 27.5″ wheels is lower than 29″ wheels.
Brakes
When you want to stop the bike in time, the brakes are vital. The SIR 9 – 4-Star X01 Eagle – 27.5+ has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, these are ideal for anyone.
Sizes
This bike is available in 8 sizes. They vary from 158 cm – 199 cm (5.18 ft – 6.53 ft). In conclusion, it won’t take much to find one that’s right for you.
Dropper post
Niner SIR 9 – 4-Star X01 Eagle – 27.5+ 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.