Niner SIR 9 - 3 Star SRAM GX Eagle - 2022

Niner SIR 9 - 3 Star SRAM GX Eagle - 2022

Niner SIR 9 - 3 Star SRAM GX Eagle - 2022

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$4,299.00 Regular price
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STEEL IS REAL

SIR 9: rugged, reliable, comfortable Reynolds 853 steel
There's a new bike in town. It's built to last and not let you down. When you're spinning up the steeps, bombing down the backcountry and grinding out the final miles as the sun sinks into the horizon, you need a bike you can trust. A comfortable, capable, hand-built bike made from proven, air-hardened, heat-treated steel. That's right, steel. Because Steel Is Real and it's fully optimized in the SIR 9.

Expect the best from Niner's popular 3-Star SRAM GX Eagle build kit. Mated to the SIR 9 frame and FOX 34 Float Factory suspension, every feature of this adventure-seeking singletrack slayer is fully optimized. 

MADE FROM METAL

RIDER TYPE: Singletrack, Bikepacking
MAX WHEEL SIZE: 29"
SIZE RANGE: S, M, L, XL

COLORS: Cement Gray/Black

  • DT Swiss X1900 SPLINE wheels
  • FOX 34 SC Float Factory EVOL FIT4, 3 position, 120mm, 110x15mm, 44mm offset
  • KS LEV SI dropper post

"Niner has just released the latest drool-worthy steel hardtail with a bikepacking predisposition." - BIKEPACKING.com

- FEATURES -

Yes, SIR

So what's the story with Niner's steel heardtail? For starters, it's STEEL. This classic metal alloy from materials icon Reynolds gives them the comfortable, durable, capable, versatile, "ride it hard and put it away wet" frame that they have always wanted.

To make it even more tasty, the SIR 9 is strapped with a 120mm travel FOX suspension fork, perforated with no fewer than 18 threaded, reinforced mounting points, clears 29x2.4" (or 27.5x3.0") tires, and offers easy options for geared or singlespeed drivetrains. No excuses - pack and extra jacket and a PBR, go farther, and stay out longer.

The SIR 9 is perfect for just about any type of riding, no matter how long or short. It's a butt-kicking, grin-inducing launch ride when you only have 30 minutes to burn in the back lot. It's also made for multi-day missions in the backcountry. And it's made to make you happy the minute you throw a leg over it.

Get real with Reynolds 853 steel

This modern metal alloy is well known for its unique properties. It actually strengthens in the tube junctions when it air-cools after welding. So, Niner can do more with it, yet they actually can use less material. For instance, they can design intricate chainstay and seat-stay yokes to accommodate either 29" or 27.5-Plus wheels and tires, with plenty of mud clearance to spare. They also don't need to add heavy gussets and tube reinforcements - it's plenty strong as-is.

“Trail country” geometry

Blurring the lines between modern trail bike geometry and traditional cross-country geometry, the SIR 9 occupies a niche we lovingly call “trail country.” If you’re doing a combination of long pedaling rides, stiff climbs, extended descents, and spicy technical sections, you’ll love what Niner's done here. “Trail country” geometry translates to modern trail manners when you need them most, with no sacrifice of efficiency or agility

The roomy cockpit has a comfortable reach for short stem lengths, giving you quick handling and plenty of maneuverability to blast through rock gardens and cut hard corners. The steep 74-degree seat angle gets you centered over the BB for climbing and pairs nicely with the short 430mm chainstay length for supreme pedaling efficiency. And of course, the slack, 68-degree head tube angle and long wheelbase contribute stability and self-confidence when you’re dropping into the steepest lines.

Pack it up, pack it in, let me begin...

The versatility of steel gives Niner the option to add accessory mounting points, and boy did they ever. There are rack and fender mounts, bottle cage mounts, frame bag mounts, and even a top-tube bento box mount. The rear rack mounts are strong enough to hold 55lbs. 

- NINER TECHNOLOGY -

  • Tire clearance
    Need room to roam? Niner has it. The SIR 9 has clearance to run your choice of 29er or 27.5+ wheels and tires.

  • Multiple mounting options
    No fewer than 18 mounting points give you the freedom to run racks, fenders, bottles, frame bags, a bento box, and more.

  • Integrated dropper post routing
    Clean and concealed, SIR 9 is ready with ports on the seat tube for internal dropper post cable routing.

  • Biocentric 30
    Do you yearn for simplicity? Our patented BioCentric bottom bracket system gives you the freedom to easily go single-speed or geared.

  • Trail ready geometry
    With a longer top tube and slacker head tube angle, the SIR 9 is stable, trail-specced and ready to get shreddy in all circumstances.

  • Lifetime Warranty
    Ride, race, rally. Niner has you covered with warranty service, small parts, and a support team that actually answers the phone.

- TECHNICAL SPECIFICATIONS -

Frame

HAND WELDED REYNOLDS 853 STEEL; EXTERNAL CABLE ROUTING; INTEGRATED BOTTLE, BAG, RACK AND FENDER MOUNTS; 12X148 THRU AXLE

Frame fittings and mounts

2 INNER TRIANGLE BOTTLE MOUNTS, 1 MOUNT UNDER DOWN TUBE, RACK AND FENDER MOUNTS

Fork

FOX 34 SC FLOAT FACTORY EVOL FIT4 3 POSITION W/ADJ, KASHIMA COAT, 120MM, 110X15MM, 44MM OFFSET

Rear suspension travel

N/A

Shock

N/A

Maximum front suspension

120MM 

Tubes/Sealant

STANS NO TUBES SEALANT (2 X 2OZ BOTTLES)

Fork offset

44MM

Front wheel

DT SWISS M 1900 SPLINE 30, CENTERLOCK, 110X15MM*

Shock size

N/A

Rear wheel

DT SWISS M 1900 SPLINE 30, CENTERLOCK, 148X12MM*

Shock Mounting Hardware

N/A

Front Tire

SCHWALBE NOBBY NIC EVO SUPER TRAIL TLE ADDIX SPEEDGRIP 2.6

Suggested Shock Sag

N/A

Rear Tire

SCHWALBE NOBBY NIC EVO SUPER TRAIL TLE ADDIX SPEEDGRIP 2.35

Seatpost Size

30.9MM

Brakes

SRAM G2 R

Seat Collar Size

34.9MM

Brake Levers

SRAM G2 R

Cable Routing

EXTERNAL

Brake rotors

180/160MM SRAM CENTERLINE X

Front derailleur

34.9 SIDE SWING, FRONT PULL

Chain

SRAM GX EAGLE 12 SP

Headset size

1.125" X 1.5" TAPERED ZERO STACK HEAD TUBE, 44MM UPPER, 56MM LOWER, CANE CREEK DESCRIPTION: ZS44/28.6|ZS56/40

Front shifter

N/A

Pivot bearing specs

N/A

Rear shifter

SRAM GX EAGLE 12 SP

Chainring compatibility

COMPATIBLE WITH STANDARD 1X, 2X AND 3X SYSTEMS

Front derailleur

N/A

Maximum chainring size

1X MAX CHAIN RING SIZE = 36T - BOOST CHAINRING RECOMMENDED

Rear derailleur

SRAM GX EAGLE 12 SP

Q-factor

168MM

Cassette

SRAM EAGLE XG 1275, 10-52T

ISCQ compatibility

NO

Crankset

SRAM DESCENDANT 7K EAGLE DUB, 32T (S/M/L - 170MM, XL - 175MM)

Bottom bracket type

73MM PF30 BB SHELL (ADAPTERS REQUIRED FOR BSA TYPE BBS)

Bottom bracket

SRAM DUB PF30

Biocentric compatible?

COMPATIBLE WITH BIOCENTRIC 30 BB

Saddle

NINER CUSTOM WITH CR-MO RAILS, EMBOSSED NINER GRAPHIC

Brake mount type

POST MOUNT

Seatpost

KS LEV SI (S-100MM, M/L/XL-150MM)

Maximum rear rotor size

180MM

Handlebar

RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP

Rear wheel spacing

BOOST 12X148MM

Stem

RACE FACE AEFFECT R 40MM, 35MM CLAMP

Rear wheel through axle spec

M12X1.75PX182L

Headset

NINER INTERNAL ZS SHIS DESCRIPTION IS42/28.6|IS52/40

Front wheel axle spacing

BOOST 15X110MM

Grips

NINER GRRRIPS L/O NYLON SOFT COMPOUND

Front wheel through axle spec


Approximate weight


Max tire size

29X2.4 OR 27.5X3.0 TIRE (TIRE SIZES VARY BY BRAND, SOME MAY NOT FIT)

- NINER GEOMETRY -

SM MD LG XL
Top Tube Length 595
603
627
652
Head Tube Angle 68° 68° 68° 68°
Head Tube Length 100 110 125 145
Seat Tube Angle 74.0° 74.0° 74.0° 74.0°
Seat Tube Length 396
421
485
533
Bottom Bracket Drop 52.0
52.0 52.0 52.0
Chainstay Length Actual 430 430 430 430
Horizontal Chainstay 427 427 427 427
Front Center 693 711 737 764
Wheelbase 1118
1136 1162 1189
Standover Height 721 739 791 830
Reach 410 425 445 465
Stack 611
620 634 652

- BIKE SIZING -

Looking for the perfect size? Check out our handy quick reference chart below (NOTE: The chart assumes average limb and torso proportions). Not sure about your size? Just send us your measurements using our Bike Sizing form and one of our experts will help you out!

Niner recommends sizing down for a more maneuverable ride or sizing up for more stability for riders who fall between sizes.

Rider Height Frame Size
5'3" to 5'9" S
5'8" to 6'0" M
5'11" to 6'3" L
6'3" to 6'7" XL

- WARRANTY -

We're an authorized Niner dealer, which means that every bike we sell is backed by Niner's warranty, including a one-year complete bike warranty and a lifetime frame warranty.  For full details, click here.

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