Niner has just released the latest drool-worthy steel hardtail with a bikepacking predisposition. The all new Niner Sir 9 was reengineered from the ground up with a mount-laden Reynolds 853 steel frame that fits 27.5+ or 29er wheels and tires…

Posted by Logan Watts

Today Niner joined the list of bike companies offering a 27.5+/29er steel ‘do-it-all’ hardtail. So how different can it be, really? Well, the all new Niner Sir 9 has a few unique tricks up its sleeve. For one it’s fabricated with the upper echelon of steel cycling tubesets, Reynolds 853 — like one of our other favorite bikes, the RLT 9 Steel. Reynolds claims that the “strength to weight ratio of 853 is close to that of quality titanium”. In addition, the Niner Sir 9 is studded with a plethora of mounts, including two pairs of inner triangle bottle bosses, one pair under the down tube, rack and fender mounts on the rear stays, and a pair of bosses topside for a bolt on top tube bag. There are also two bosses on the underside of the top tube enabling a fully strapless bolt-on frame pack (as shown in a few of these press time photos).

Niner SIR 9, 2017-2018, Bikepacking, 27.5+

  • Niner SIR 9, 2017-2018, Bikepacking, 27.5+
  • Niner SIR 9, 2017-2018, Bikepacking, 27.5+

Other changes to note include a completely new chainstay yoke. To increase strength and stiffness, and to meet international ISO mountain biking standards, Niner created a nearly unified yoke which, according to Niner, “… allowed us to create longer and stronger welds to the bottom bracket.” Hidden inside is a plate that adds to the bike’s overall stiffness.

Niner SIR 9, 2017-2018, Bikepacking, 27.5+

  • Niner SIR 9, 2017-2018, Bikepacking, 27.5+
  • Niner SIR 9, 2017-2018, Bikepacking, 27.5+

KEY FEATURES

  • Reynolds 853 steel provides the supple, comfortable ride this legendary material is known for.
  • Compatible with 29 X 2.4, or 27.5 X 3.0 tires to offer the choice of maximum roll over or ultra traction and stability.
  • Revised geometry is optimized for modern trail riding, long days in the saddle and all around good times.
  • Integrated (bolt-on) bag mounts inside front triangle.
  • Bento box mounts on top tube offer additional storage options within reach.
  • 73mm PF 30 BB shell is geared or singlespeed compatible with the Niner Biocentric 30.
  • 148 X 12 Boost rear spacing.
  • Compatible with 1x (max ring 36t) and 2x (26/36 or bigger) drivetrain systems.
  • Compatible with 2x (26/36 or bigger) drivetrain systems, 34.9 Sideswing front pull front derailleur.

TECH SPECS

  • 73mm PF30 BB shell (adaptors required for BSA type bbs).
  • Compatible with Biocentric 30 for singlespeed use.
  • 30.9 seat post.
  • 31.8 seat collar.
  • 34.9 front derailleur clamp.
  • 1.125” X 1.5” Tapered zero stack head tube, 44mm upper, 56mm lower, cane creek description: ZS44/28.6 ZS56/40.
  • 34.9 Side swing, front pull front derailleur.
  • Post mount disc brake – 180mm max rotor size.
  • All sizes have 2 inner triangle bottle mounts, 1 mount under down tube.
  • Can fit up to a 29×2.4O, or 27.5×3.0 Tire (tire sizes vary by brand, some tires may not fit).
  • Compatible with standard 1x (36t max), 2x and 3x systems.

Niner SIR 9, 2017-2018, Bikepacking, 27.5+

The new Niner SIR 9 was designed around Niner’s [r]evolution Trail Geometry and has a 68° head tube angle, 74° seat tube angle, a 427mm chainstay, and a 55mm BB drop. The Niner SIR 9 is available as a frame only for $1200 or one of nine build kits — five 29er options ranging from 2-Star SLX at $3,000 to 5-Star Eagle X01 Carbon for a cool $6k. As a 27.5+ you can get one of four different builds ranging from 2-Star SLX with Stan’s ZTR Baron wheels and a Reba fork for $3,300, to the 5-Star Eagle build with the same wheels, an Eagle X01 drivetrain and a 120mm Fox Float Factory fork for $5k. We like the looks of the 27.5+ Eagle X01 build and the slightly more affordable 4-Star XT:

Niner SIR 9 27.5+ XT

Niner SIR 9 4-STAR XT STANS – 27.5+ $4,400

  • FORK FOX 34 FLOAT FACTORY FIT4, 3 POSITION W/ ADJ, KASHIMA COAT, 120MM, 110X15MM
  • WHEELS STAN’S NOTUBES NEO/ZTR BARON S1, 110X15MM FRONT, 148 X 12MM REAR
  • TIRES MAXXIS REKON+ DC/EXO/TR 2.8 FRONT & REAR
  • BRAKES & ROTORS SHIMANO XT M8000 ICE TECH PADS, 180/160MM RT86 ICE TECH ROTORS
  • R/ SHIFTER SHIMANO XT M8000 11SP I-SPEC II
  • R / DERAILLEUR SHIMANO XT M8000 GS 11SP SHADOW PLUS
  • CASSETTE SHIMANO XT M8000 11-46T
  • CHAIN SHIMANO XT HG-701 11SP
  • CRANK SET RACE FACE TURBINE 32T
  • BOTTOM BRACKET RACE FACE PF30
  • SADDLE NINER CUSTOM WITH CR-MO RAILS, NINER GRAPHIC
  • SEAT POST KS LEV INTEGRA
  • HANDLEBAR RACE FACE NEXT 760MM WIDE, 20MM RISE, 35MM CLAMP
  • STEM RACE FACE AEFFECT 35MM CLAMP
  • GRIPS NINER GRRRIPS L/O

Niner SIR 9, 2017-2018, Bikepacking, 27.5+

  • TBGR_LOL

    Thanks for the article. I’ve been waiting for news about this bike and figured they would try to make it bikepacker friendly. This looks like a great bike … apart from the press-fit bottom bracket. Why do that, especially on a steel frame?

  • Jake Kruse

    hot damn, this is a great looking bike. if folks were left in the cold by salsa terminating the el mar, this fits the bill and then some.

  • Tiger Funk

    True, except for the press-fit BB – Salsa El Mar for the win. Dear Niner, please thread your BB’s.

  • Jake Kruse

    rather have the threaded bb as well but not a deal breaker for me.

  • Rob Grey

    want. so much. but for those prices i can get local boutique handmades in canadian dollars. still tempted, though

  • http://www.bikepacking.com Logan Watts

    Other than manufacturing benefits, some would argue that PF30 offers weight savings, greater bearing durability, clean / narrow q-factor, plus a bigger, stronger crank spindle, and the ability to run a concentric BB for single speed conversion…

  • Warwick

    I get the hate on PF BBs but having had the previous generation of this frame and now an RLT, I can say I’ve not one issue noise or anything with PF in a steel frame (touch wood). With the Sir9 I ran the EBB with a King GXP and never had a complaint over three years, now with the RLT am running a PF30 King and so far same again.

  • http://www.bikepacking.com Logan Watts

    Good to hear. I spent a fair amount of time on the RLT 9 Steel (which I loved) and never had a problem. At this point, the only time I would take issue with a PF BB is if 1. the tolerances were out of whack and it made noise all the time; 2. if I were setting out on a big 3+ month trip overseas somewhere it wouldn’t be possible to service…

  • TBGR_LOL

    Yeah but still

  • speedius

    I have last year’s model. 6’4″ 200lbs, no issues with EBB. If you are more cross country oriented, you might be better off with it if you can find it- steeper head tube, comes with headset, $200 cheaper. Shorter chainstays might be nice though.

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