Niner
Niner

Niner Ros 9 Plus Frameset

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Item #: FR201A04
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Niner Ros 9 Plus frameset

What do you get when you cross a 29er with a fat bike? The answer is the Niner ROS 9 Plus! By using the insanely popular ROS 9 long travel hardtail geometry to draft up the blueprint for the ROS 9 Plus, Niner has introduced the first trail-esque rigid 29+ shredding machine.

Many of the 29+ Bikes on the market are designed around a short-travel cross country geometry, whereas the ROS 9 Plus takes it in a different direction. Niner slackened the headtube and shortens the chainstays to make this a true fun factory of a bike. The frame is built for 29x3.0" tires which take traction and plushness to previously unknown levels. If you've never ridden 29+, you're destined to have a big grin on your face the moment to unleash this beast on the trail.

Niner built the ROS 9 Plus from 4130 ChroMoly steel, a bombproof material that will absorb the abuse inflicted by the most unforgiving of trails, offering the resilience and ride quality you want for unruly riding. Its razor sharp handling is augmented with a custom forged 142x12 Maxle compatible dropouts in the rear, the frame is further equipped to resist twist under heavy pedal loads and when cornering and descending. Up front, the matching tapered chromoly steel fork features a unique 15mm thru-axle and a 470mm axle to crown length to keep the front low so that you can get the best climbing position. Additionally, the ROS 9 Plus frame also features clever details that are a little less noticeable, such as internal and external dropper routing, removable downtube cable guides, Biocentric II Bottom Bracket and custom forged seat and chainstay bridges. With the included BioCentric II eccentric bottom bracket, the frame is easy to run as a single-speed if you so wish. If you're going to keep running this as a multi-speed, the BB height can be adjusted when using a BioCentric II bottom bracket to fit this bike to your specific needs.

Although the short chainstays and 3.0 tires limit the ROS 9 Plus to a 1X only set up, Niner has kept the removable High Direct Mount on the seat tube for use with chain guides available for this standard. Additionally, Niner worked with MRP, to design unique mounts for a custom XCG Bash Guard to protect the precious chainrings from rocks, logs and other trail impacts.

The bottom line is, when a rowdy steel frame with a slackened headtube and chiseled chainstays meets the 29+ wheel, you get a bombproof bike that's jonesin' to be shown a good time.

Features

  • Rowdy steel radness from the 29er-only mountain bike company
  • Zero mm of suspension is efficient in every way
  • 44mm Oversized headtube is compatible with 120-140mm forks
  • Aggressive geo is slack and low with extra-short chainstays for playful ripping
  • BioCentric II enables perfect singlespeed setup and allows geometry fine-tuning
  • Forged frame details and internal dropper post routing
  • 142mm x 12mm rear spacing for excellent stiffness and strength
SPECIFICATIONS
Frame Niner ROS 9 Plus, 4130 Cro-Mo tube set, 142x12 Maxle, external or stealth dropper routing
Wheel Size 29" Plus
Fork Niner 4130 Cr-Mo Fork, 15MM, tapered
Headset Included Yes
Headtube Diameter Tapered 44/56mm
Front Derailleur Direct mount
Bottom Bracket 73mm external threaded with included Niner BioCentric BB
Seatpost 31.6mm
Seat Clamp 35.0mm (included)
Dropout Style 12 x 142mm (Axle included)
Accessory Mounts Water bottle cage
Cable routing External with removable guides
Intended Use Trail, All-mountain
Weight
-
GeometryChart
GEOMETRY (mm / inch)
Size Small Medium Large Extra Large
A: Seat Tube Length 378
14.9 		411
16.2 		467
18.4 		530
20.9
B: Effective Top Tube 578
22.8 		595
23.4 		614
24.2 		633
24.9
C: Stack 598
23.5 		607
23.9 		621
24.4 		621
24.4
D: Reach 404
15.9 		418
16.5 		434
17.1 		453
17.8
E: BB Height - - - -
F: BB Drop 56
2.2 		56
2.2 		56
2.2 		56
2.2
G: Head Tube Length 100
3.9 		110
4.3 		125
4.9 		125
4.9
H: Head Tube Angle 69.0 ° 69.0 ° 69.0 ° 69.0 °
I: Seat Tube Angle 74.0 ° 74.0 ° 74.0 ° 74.0 °
J: Standover Height 684
26.9 		711
28.0 		756
29.8 		803
31.6
K: Chainstay Length 445
17.5 		445
17.5 		445
17.5 		445
17.5
L: Wheelbase 1094
43.1 		1112
43.8 		132
5.2 		1151
45.3
Suggested Rider Height 161-175cm
5'3"-5'9" 		173-183cm
5'8"-6'0" 		181-191cm
5'11"-6'3" 		191-201cm
6'3"-6'7"

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CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

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