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2017 Niner Jet 9 RDO Mountain Bike Frame

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2017 Niner Jet 9 RDO Mountain Bike Frame

 

Niner’s engineers have been busy, going back to the drawing board and revamping almost every frameset for 2017. It was worth the effort though, and the 2017 Niner Jet 9 RDO Mountain Bike Frame is back with a massive facelift, 20 additional millimeters of Continuously Varying Arc (CVA) travel, compatibility with both 29er and 27.5+ wheels, and even more versatility than its predecessor. It’s slacker up front, steeper out back, longer across the top, and flat out better at all the things that made us love the original Jet 9.

As with most bikes in the current trail generation, the key element underwriting the new Jet 9’s versatile geometry is its Boost rear axle. Bumping the spacing up to 148mm lets Niner chop 21mm off of chainstays by slamming the rear wheel up into the seat tube. The seat tube contributes to that versatility, too. Despite the fact that the 2017 Jet 9 comes with a recommended front travel pairing of 130mm for 29in wheels and 140mm with 27.5+, it’s got a similar seat tube angle as the 2016 Jet 9 with a 100mm fork. Adding that much travel up front would typically force you out of the bike’s center; however, the new Jet 9’s geometry keeps you on top of the pedals for stable handling and efficient power transfer.

The bike’s updates shine at the front end, too. In 2016, the Jet 9 was limited to a 71 or 70.5-degree head tube, depending on whether you were running a 100 or 110mm fork. For 2017 it drops to 67.5 degrees when paired with a 130mm fork and 29in wheels and down to 67 degrees with a 140mm fork and 27.5+ wheels. This puts the Jet 9 right on the cusp of moderate stability and enduro abandon. When paired with the new iteration’s longer reach and shorter stem, that angle means the bike can ride roughshod across all manner of trail furniture without sacrificing responsive steering.

Despite the geometry changes, Niner’s Race Day Optimized (RDO) construction process remains relatively unchanged. This is a good thing, as Niner’s compaction method presses out any excess resin and compacts the carbon down to a uniform wall thickness. This gives Niner precise control over where material is and where it isn’t, letting the engineers actually engineer the frame by reducing weight where it’s not needed while ensuring stiffness and durability at key areas of power transfer and abuse.

The CVA suspension model is also virtually unchanged. CVA is designed specifically around 29in wheels to keep the big-rim platform balanced between taut and supple, and is an ideal pairing platform for 27.5+ wheels with their similarly-sized profile. CVA’s low compression ratio means there’s less need for suspension preload, so the mechanism can float more freely and react more readily to the terrain without being loose or sloppy. CVA’s lower linkage placement beneath the bottom bracket isolates pedal input from suspension action to prevent the system from bobbing or back-kicking, resulting in a smooth but efficient bike that’s responsive to both your power and the trail’s trickery.

The frame’s finishing details are everything you’d expect from the obsessive designers at Niner, and our favorite new addition is the inclusion of a BSA threaded bottom bracket. PressFit shells may be lighter and more convenient, but the exact tolerances of a CNC-machined thread are virtually unsurpassable by today’s composite technology. The threading means bearing cups install perfectly, reducing wear over time and eliminating the creaks, groans, and pops that so often accompany PressFit models. Vulnerable bits are girded with titanium protection plates. The frame also includes integrated batter storage in case you get the urge for electro shifting and the revised axle spacing and geometry dimensions accommodate 29er tires up to 2.4in and 27.5+ tires up to 3in.

Niner’s classic trail bike gets boosted versatility

5 inches of CVA suspension designed for big wheels and ambitions

Revised geometry climbs faster and descends harder

RDO carbon construction minimizes weight to gain speed

Compatible with electronic drivetrain routing and battery storage

Compatible with 29in and 27.5+ wheels

 

2017 Niner Jet 9 RDO Mountain Bike Frame

Frame Material:

RDO carbon fiber

Suspension:

CVA

Wheel Size:

29 in, 27.5+

Rear Shock:

Fox Float Factory Evol

Rear Travel:

120 mm

Fork Travel:

[recommended with 29in wheels] 130 mm, [recommended with 27.5+ wheels] 140 mm

Head Tube Diameter:

1-1/8 – 1-1/2in tapered

Headset Included:

yes

Bottom Bracket Type:

73mm BSA threaded

ISCG Tabs:

yes, ISCG 05

Cable Routing:

internal

Front Derailleur Mount:

low direct-mount

Derailleur Pull:

side swing

Brake Type:

post-mount disc

Seatpost Diameter:

30.9 mm

Rear Axle:

12 x 148mm Boost

Recommended Use:

trail

Manufacturer Warranty:

5 years

Actual Weight:

Carbon/Red, L: 2650g

 

2017 Niner Jet 9 RDO Mountain Bike Frame

GEOMETRY CHART

Jet 9 RDO
130mm Travel Fork
  Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay

(CS)

Wheelbase
XS 14in 22in 23.3in 15.5in 26.4in 3.7in 67.5o 74.5o 1.2in 17.1in 43.9in
S 15in 22.7in 23.7in 16.1in 27in 4.1in 67.5o 74.5o 1.2in 17.1in 44.7in
M 17in 23.5in 24.2in 16.8in 28.7in 4.7in 67.5o 74.5o 1.2in 17.1in 45.5in
L 19in 24.4in 24.6in 17.5in 29.8in 5.1in 67.5o 74.5o 1.2in 17.1in 46.4in
XL 21in 25.3in 25.1in 18.3in 31.1in 5.7in 67.5o 74.5o 1.2in 17.1in 47.4in
140mm Travel Fork
  Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay

(CS)

Wheelbase
XS 14in 22.1in 23.4in 15.3in 26.5in 3.7in 67o 74o 1.1in 17.1in 44.1in
S 15in 22.8in 23.8in 15.9in 27.2in 4.1in 67o 74o 1.1in 17.1in 44.8in
M 17in 23.6in 24.4in 16.6in 28.8in 4.7in 67o 74o 1.1in 17.1in 45.7in
L 19in 24.5in 24.7in 17.4in 30in 5.1in 67o 74o 1.1in 17.1in 46.6in
XL 21in 25.4in 25.3in 18.1in 31.3in 5.7in 67o 74o 1.1in 17.1in 47.5in

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