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Niner WFO 9 Frame 2012

Item #: FR230I00
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Niner WFO 9 Frame

The WFO 9 boldly goes where no 29er has gone before. This All-Mountain masher is ready to shed some light on what 29” wheels can do with 5.5” of travel. The progressive “confidence inspiring” geometry provides slack enough angles to get you comfortably down steep and rocky terrain, yet not so slack that you’d find it hard cornering tight turns or having to climb. The WFO was constructed with hydroformed tubing which allows for careful shaping and control or wall thickness, optimizing strength and stiffness in key areas. These hydroformed tubes paired with the tapered headtube and 12x142mm rear axle ensure the WFO remains stiff and strong from head to toe.

The WFO will not handle like any other long-travel bike you’ve ridden before. The 29” wheel platform provides a lower rolling resistance and the ability to get down the most rutted sections with ease while the tapered headtube reduced fork deflection, keeping your line straight and true. The long-travel and big wheels will eat up just about anything that gets in your way of having a good time. You’ll find yourself getting down some seriously sketchy sections quicker and easier than before.

The WFO 9 features Niner’s patented CVA suspension. This is the only suspension created for the sole purpose to be used on 29” bikes. In other words, they did not modify suspension that was created for a 26” wheel. The CVA suspension was created with the goal of efficiency. Due to the location of the lower pivot bolt, chain torque effectively isolates and cancels out the forces acting to create inefficiency in pedal stroke. The rider will be able to use all three chainrings. CVA has excellent small bump compliance, to ensure that your ride is smooth as well as fast.

Independent Review

"I found myself carrying unprecedented speed through sections of trail that I know well. More impressive, cornering grip in the loose, sandy turns was very predictable. By the end of my first ride out , I was carrying more speed on almost every part of what is a very challenging trail than any other bike I’ve taken down it to date. To say I was impressed is an understatement."

- Toni W., Read Toni's full review over at

Niner WFO 9 Frame Features

  • 140mm of patented CVA suspension is controlled and sensitive
  • Compatible with 140-160mm forks
  • Tapered headtube technology
  • Hydroformed tube construction
  • RockShox Monarch Plus rear shock
  • Coil or piggyback shock compatible
  • ISCG 03 (ISCG old) compatible

Niner WFO 9 Frame Specifications

  • 73mm English threaded BB width
  • "D" mount direct high mount front derailleur, bottom pull
  • 30.9mm seatpost size
  • 34.9mm seat collar size (included)
  • 142 x 12mm Maxle rear spacing
  • TT cable guides for dropper posts
  • Can fit up to a 2.5" tire (tire size varies by brand, some tires may not fit)
  • Small, Medium, Large and XL have one inner triangle bottle mount
  • 1.125" - 1.5" tapered head tube, 44mm upper 56mm lower (headset NOT included)
  • Shock size: 7.875" x 2.25" (200mm x 57mm) - 5.5" (140mm) travel
  • Shock mounting hardware width and drilling: 21.86mm x M6
  • Shock SAG: 25% (which will move the o-ring 14.5mm down the shaft)
  • Enduro Max sealed bearings - (6) 28 x 15 x 7mm, (2) 24 x 12 x 6mm
  • SRAM recommended 2x chainring configs: 26/39T or lower
  • SRAM XX1 recommended max chainring: 36T, Q-Factor: 168mm
  • Shimano XT recommended 2x chainrings: 28/40T or lower
  • Shimano XTR recommended 2x chainrings: 26/38T. Niner does not recommend the use of 40T (48.8mm chainline) cranks because the large chainring may contact the frame
  • Claimed weight: Large - 8lbs 10oz, X Large - 8lbs 15oz
Size Small Medium Large Extra Large
Seat Tube Length 16" (406mm) 18" (457mm) 20" (508mm) 22" (559mm)
Effective Top Tube Length (140) 587mm 603mm 622mm 641mm
Effective Top Tube Length (160) 590mm 606mm 626mm 644mm
Head Tube Length 120mm 120mm 130mm 145mm
Seat Angle (140) 74° 74° 74° 74°
Seat Angle (160) 73° 73° 73° 73°
Head Angle (140) 69° 69° 69° 69°
Head Angle (160) 68° 68° 68° 68°
Wheelbase (140) 1141mm 1158mm 1178mm 1198mm
Wheelbase (160) 1149mm 1167mm 1186mm 1206mm
Chain Stay Length 455mm 455mm 455mm 455mm
BB Drop (140) 22mm 22mm 22mm 22mm
BB Drop (160) 14mm 14mm 14mm 14mm
Standover Height (140) 718mm
Standover Height (160) 727mm
Stack (140) 623mm 623mm 632mm 647mm
Stack (160) 630mm 630mm 640mm 654mm
Reach (140) 408mm 425mm 442mm 456mm
Reach (160) 397mm 414mm 430mm 445mm
Sizing 5'3" - 5'9"
5'8" - 6'0"
5'11" - 6'3"
6'3" - 6'7"

Note: Geometry measurements are given for 140mm and 160mm travel fork options.


by PowerReviews
Niner Wfo 9 Frame 2012

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Best bang for the buck!

By Cy

from Boulder

Verified Buyer


  • Great price
  • Handles Any Trail
  • Long travel
  • Sturdy


    Best Uses

    • all mountain

    Comments about Niner Wfo 9 Frame 2012:

    This frame is literally the best option I came across for building my own AM bike. Not only does it handle anything thrown at it, it is a steal. On top of that, as always, Jenson has proved to provide a satisfactory customer service. The frame comes with a Maxle Lite rear axle which got damaged after riding the bike for a few hundred miles. However, Jenson quickly replaced the defective part under warranty.

    • Was this a gift?:
    • No

    Great frame

    By E

    from Northeast

    Verified Buyer


    • Balanced
    • Efficient Pedaling
    • Great handling
    • Rugged


    • Heavy

    Best Uses

    • Trail And Am

    Comments about Niner Wfo 9 Frame 2012:

    Great bike for technical single track, good climber, awesome descender.

    • Was this a gift?:
    • No

    Displaying reviews 1-2

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