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Niner SIR 9 4-Star X01 Bike

ITEM NUMBER: 018 NINS44
PRICE POINT:
$0.00

NINER TECHNOLOGY

For every model, whether it's their lightest cross country hardtail or the burliest full suspension bike, Niner considers how each angle or length will interact with big wheels to affect the finished build.

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The basic concept of the larger diameter is simple: it will keep your wheels on top of oncoming obstacles. Rather than riding IN the terrain, you'll be riding ABOVE it, gaining more control and stability on even the roughest trails.

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PRODUCT DESCRIPTION

Niner SIR 9 4-Star X01 Bike

At a time when carbon super bikes (including Niner's flagship models) dominate the stage, why would Niner shine a spotlight on the SIR 9? Perhaps it’s better to ask “just what is it about steel bikes?” Why is it, when you get on a steel frame, your'e instantly transported back to that first bike you had as a kid? Why is steel just as relevant today as it was 50 years ago while other materials have come and gone?

There wasn’t anything wrong with the SIR 9 – like other Ninerds we ride it and love it. But something about Steel being equated with Retro seemed almost unfair to such a great bike. There is simply no reason frames built with one of the best metals on the planet shouldn’t benefit from and take full advantage of cool technologies like updated headsets standards, tapered forks and through axles.

Introducing the new S.I.R. 9 – all the fun, all the advantages, all the steel. All steel is not created equal. The S.I.R. tubing is a custom-selected set that utilizes the best tube options for each application within the frame. For the front triangle, Niner used the new Reynolds 853 DZB (Double Zone Butting) tubing. Developed for mountain bikes, and specifically 29ers. For the stays, they incorporate steel custom bent in 3 dimensions – with investment cast bridges and dropouts – for ride quality and tire clearance. This shaping is proprietary to Niner and is not found on other steel mountain bikes. When combined with the new dropout system, it provides superior power transfer while preserving the compliant ride quality you want in a steel frame.

  • Custom engineered steel tubeset
  • Custom bent double-butted Reynolds 853 DZB
  • 44mm Reynolds 631 head tube
  • Niner BioCentric II Bottom Bracket
  • 142x12 rear Maxle
  • Post Mount tabs

FREE $200 value Pro Build Service

Every Niner Complete bike sold by Price Point includes professional assembly by our trained mechanics prior to shipment. With Price Point ProBuild, you'll receive the most thorough, highest-level service available. We will inspect your new frame, install, and tune all components, then partially disassemble it so that it is ready to ship directly to you. Upon arrival, you'll only need to unpack it and perform some basic re-assembly tasks in order to get your new Niner ready to ride.

Pro Build 30 Point Check List

  1. Inspect frame for any blemishes/defects, check frame alignment
  2. Frame prep: headtube and bottom bracket shell, face/clean surfaces as needed
  3. Install headset: apply light grease to frame and press cups
  4. Install bottom bracket: apply assembly compounds as spec'd (grease or carbon assembly compound)
  5. Install front derailleur: align with manufacturer's specs and torque to spec (direct mount Loctite mounting screws)
  6. Install cranks: grease spindle/bearing contact areas, torque crank bolts & spider bolts to manufacturer's specifications
  7. Check rear derailleur hanger alignment
  8. Install rear derailleur: grease threads and torque to spec
  9. Install fork: Press headset race, lightly grease all bearing contact points for headset
  10. Install stem: torque to spec
  11. Cut steer tube to proper length and install headset tensioner
  12. Install handlebar: torque to spec
  13. Install shifters
  14. Install brake levers
  15. Measure and cut shifter housing
  16. Attach derailleur cables
  17. Measure and cut brake housing
  18. Bleed brakes/attach brake cables
  19. True wheels and check spoke tension
  20. Install cassette, brake rotors and tires
  21. Align brakes: torque bolts to spec
  22. Install chain: check crossover gear and cut to length
  23. Tune rear derailleur: set limits and stretch cable
  24. Tune front derailleur: set limits and stretch cable
  25. Check torque values for all bolts
  26. Install grips/tape
  27. Install saddle
  28. Partially disassemble bike for shipping, remove front wheel, remove stem, remove seat/post and deflate tires
  29. Cover all critical areas with protective material
  30. Box bike for shipping

PRODUCT SPECIFICATIONS

Model

SIR 9 4-Star X01

Fork

Rock Shox SID XX 100mm 15mm Maxle Red

Headset

ZS44 top EC44 bottom

Brakes

SRAM Elixir 9 Trail, 180/160mm G2 Rotors

Wheels

Stan's Notubes 3.30/ZTR Arch EX , 15mm Fnt, 12x142mm R

Tires

Schwalbe Rapid Rob EVO 2.4/ Racing Ralph EVO 2.25

Handlebar

Niner Flat Top 780mm Red Graphic

Stem

Niner Alloy, Red Graphic

Seat Post

Niner Carbon, Red Graphic

Grips

Niner

Saddle

WTB Volt Race

Shifters

SRAM X01 11spd

Front Derailleur

N/A

Rear Derailleur

SRAM X01 11spd

Chain

SRAM PC1170 11spd

Cassette

SRAM XG- 1195 11spd 10-42t

Crankset

SRAM X01 32t

Bottom Bracket Design

SRAM PF30

GEOMETRY

Geometry

Size

Small

Medium

Large

X-Large

A

Top Tube Length (mm)

592

609

628

647

B

Seat Tube (mm)

394

419

483

546

C

Chain Stay (mm)

440

440

440

440

D

Front Center (mm)

651

664

684

701

E

Wheelbase (mm)

1085

1096

1115

1135

F

Bottom Bracket Drop (mm)

49

49

49

49

G

Head Tube Length (mm)

100

110

125

145

H

Head Tube Angle

70

70

70

70

I

Seat Tube Angle

72

72

72

72

J

Standover (mm)

716

736

790

842

K

Reach (mm)

395

409

423

436

L

Stack (mm)

620

637

652

671


Geometry based on 100mm fork

Rider Height Bike Fit Chart

Height

Frame Size

5'3" - 5'9"

Small

5'8" - 6'

Medium

5'11" - 6'3"

Large

6'3" - 6'7"

X-Large

Please Note: These are only recommendations. Fit is also affected by inseam, torso length, reach, component selection and riding style.

Compatibility

73mm BB width (with BioCentric installed)

BioCentric is compatible with external bearing cranksets only

27.2mm seatpost size, 400mm length recommended

28.6mm front derailleur, high mount, bottom pull

29.6mm seat collar size

Tapered headset with internal (ZS) top cup and 1.5" external bottom cup. Cane Creek standard description: ZS44/28.6|EC44/40

Small has one bottle mount in the front triangle. Medium, large, and XL have two bottle mounts inside the front triangle

Replaceable derailleur hanger or SS insert

142 x 12mm Maxle rear spacing

Can fit up to a 2.4" tire (tire sizes vary by brand, some tires may not fit)

Compatible with standard 3x chainring systems

SRAM recommends 2x chainrings; 26/39T or lower

SRAM XX1 recommended max chainring: 36T with BioCentric forward Q-Factor: 168mm

Shimano XT recommended 2x chainrings: 28/40T or lower

Shimano XTR 2x is not recommended. Both versions (40t/48.8mm chain line and 38t/46.6mm chain line) position the large chainring in a way that in may contact the frame

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