Niner SIR 9 27.5+ 4-Star 2018
2018 Mountain
Estimate price |
4,950$
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Steel -
Wheels 27.5" -
Travel Front 120mm -
Fork Fox Factory Float 34
-
Groupset X01, X1 -
Suspension Hardtail -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
158cm - 171cm
MD
168cm - 180cm
LG
178cm - 189cm
XL
186cm - 199cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Chromoly
Suspension Fork
FOX 34 Factory Float FIT4, Kashima coating, EVOL air canister, 3-position compression adjustment
Rear Shock
N/A
Drivetrain
Rear Derailleur
SRAM Eagle X01, 12-speed
Front Derailleur
N/A
Shift Levers
SRAM Eagle X01, 12-speed
Cassette
SRAM XG-1295, 10-50 tooth
Crank
SRAM X1 Carbon
Bottom Bracket
Pressfit
Chain
SRAM X01 Eagle, 12-speed
Chain Guide
N/A
Pedals
N/A
Wheels
Front Hub
Stan's NoTubes Neo/ZTR Arch Baron, 15mm x 110mm, 12mm x 148mm
Rear Hub
Stan's NoTubes Neo/ZTR Arch Baron, 15mm x 110mm, 12mm x 148mm
Rims
Stan's NoTubes Neo/ZTR Arch Baron
Tires
Maxxis Rekon+ 2.8" EXO, dual compound, tubeless ready
Cockpit
Headset
Niner headset, zero-stack SHIS, ZS44/28.6, ZS56/40
Seat
Saddle
Niner Custom TR, carbon-titanium rails, custom Niner graphic
Seatpost
KS Lev Integra
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.5 mm | 1.46 mm | 1.43 mm | 1.41 mm |
| Bottom Bracket Height | 303 mm | 303 mm | 303 mm | 303 mm |
| Front Center | 696 mm | 714 mm | 740 mm | 767 mm |
| Rake | 54 mm | 53 mm | 54 mm | 54 mm |
| Trail | 85 mm | 86 mm | 85 mm | 85 mm |
| Stack | 607 mm | 616 mm | 630 mm | 648 mm |
| Reach | 406 mm | 421 mm | 441 mm | 461 mm |
| Top Tube Length | 591 mm | 599 mm | 623 mm | 648 mm |
| Seat Tube Angle | 74 ° | 74 ° | 74 ° | 74 ° |
| Seat Tube Length | 396 mm | 421 mm | 485 mm | 533 mm |
| Head Tube Angle | 68 ° | 68 ° | 68 ° | 68 ° |
| Head Tube Length | 100 mm | 110 mm | 125 mm | 145 mm |
| Chainstay Length | 423 mm | 423 mm | 423 mm | 423 mm |
| Wheelbase | 1114 mm | 1132 mm | 1158 mm | 1185 mm |
| Bottom Bracket Drop | 52 mm | 52 mm | 52 mm | 52 mm |
| Standover Height | 717 mm | 735 mm | 787 mm | 826 mm |
| Wheels | 27" | 27" | 27" | 27" |
| Rider Min Height | 158 cm | 168 cm | 178 cm | 186 cm |
| Rider Max Height | 171 cm | 180 cm | 189 cm | 199 cm |
Model Overview
SIR 9 27.5+ 4-Star belongs to the Niner Sir model. There are 44 bikes that carry this model name. Check out the entire range from 2018 of this model, by clicking this link.
Model range prices
The most economical model, the Niner SIR 9 27.5+ 1-Star 2018 has a starting price of 2300$. Niner SIR 9 5-STAR 2018 on the other hand is the most expensive at 5950$.
Safety
When cycling always take safety very seriously. Wear a helmet, obey the traffic rules and wear hi-vis clothes. In short, take care of yourself so others can take care of you.
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$. However, even if your budget is less than the average, you might still be able to get a top-quality Trail bike. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
When Niner released this model in 2018, its price was 4950$. Comparing the average cost of a Trail bike to this one, you will see that SIR 9 27.5+ 4-Star price is 79.22% more expensive.
Overview of components
Fork
The fork installed on this bike is the Fox Factory Float 34 model. The travel on this model is 120mm. Bike forks are good shock absorbers and provide a smooth ride and a great experience. In conclusion, always look for a fork with decent travel when you buy a bike.
Wheels
When leaving the production line, the SIR 9 27.5+ 4-Star model has 27.5″ aluminum wheels. 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
For your safety, it is important to have quality breaks on your bike. Niner SIR 9 27.5+ 4-Star has Hydraulic Disc brakes installed. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, these are ideal for anyone.
Sizes
This bike is available in 4 sizes. They vary from 158 cm – 199 cm (5.18 ft – 6.53 ft). In short, it won’t be difficult to find the right one for you.
Dropper post
A dropper post is included with the SIR 9 27.5+ 4-Star. Therefore, climbing or descending will be a breeze.