Niner SIR 9 – 3-Star GX Eagle – 27.5+ 2019
2019 Mountain
Estimate price |
4,050$
Weight | 12 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 GX Eagle, Truvativ Descendant -
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 GX EAGLE 12SP
Front Derailleur
N/A
Shift Levers
SRAM GX EAGLE 12SP
Cassette
SRAM EAGLE XG 1275, 10-50T
Crank
SRAM DESCENDANT 7K EAGLE DUB 32T
Bottom Bracket
73mm PF30 BB Shell (Adapters Required For BSA Type BBs); compatible with Biocentric 30 BB
Chain
SRAM GX 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 R
Brake Levers
SRAM GUIDE R
Disk Rotors
180/160MM SRAM G2CS ROTORS
Cockpit
Stem
RACE FACE AEFFECT R 40MM, 35MM CLAMP
Handlebar
RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP
Grips
NINER GRRRIPS L/O NYLON FLANGED
Headset
NINER INTERNAL ZS SHIS DESCRIPTION ZS44/28.6|ZS56/40
Seat
Saddle
NINER CUSTOM TR WITH CR-MO RAILS, PRINTED NINER GRAPHIC
Seatpost
KS LEV SI
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 |
About this model
SIR 9 – 3-Star GX Eagle – 27.5+ belongs to the Niner Sir model. 44 bikes variations carry this model name so far. You can easily view all of the Niner Sir bikes models from 2019, here.
Model range prices
Niner SIR 9 – 2-Star NX Eagle – 27.5+ 2019 is the most affordable bike of this model and has a price of 2600$. On the other hand, Niner SIR 9 – 5-Star X01 Eagle – 29 2019, is the most expensive and costs 6500$.
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 Trail bikes
If you want to purchase a solid Trail bike, it is important to know that the average cost is 2762$. However, even if your budget is less than the average, you might still be able to get a top-quality Trail bike. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
This bike was released in 2019 and its price was 4050$. Comparing the average cost of a Trail bike to this one, you will see that SIR 9 – 3-Star GX Eagle – 27.5+ price is 46.63% more expensive.
Trail bikes average weight
Trail bikes weigh an average of 12.98 kg (28.62 lbs). An easier bike will give you a big advantage in climbs. However, a heavier bike can gain speed when you descend.
a bit lighter than average, SIR 9 – 3-Star GX Eagle – 27.5+ has a weight of 12 kg (26.46 lbs). In other words, this model is 8.17% lighter than the average Trail bike.
SIR 9 – 3-Star GX Eagle – 27.5+ components
Fork
This bike has the Fox Factory Float 34 fork installed. The fork’s travel is 120mm. Bike forks absorb the shocks and give you a smooth and pleasant ride. To sum it all, when buying a bike, ensure that you look for a fork capable of decent travel.
Wheels
As for the wheels, Niner SIR 9 – 3-Star GX Eagle – 27.5+ 2019, has a 27.5″ aluminum model. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, these wheels have a slower top speed if you compare them to 29″ wheels.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. With Hydraulic Disc brakes, you’ll be able to stop on a dime, even in wet or icy conditions. To sum up, your safety is in good hands.
Sizes
There are 8 sizes available for this model. Rider height can be anywhere between 158 cm – 199 cm (5.18 ft – 6.53 ft). In conclusion, finding one for you shouldn’t be a problem.
Dropper post
Niner SIR 9 – 3-Star GX Eagle – 27.5+ comes with 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.