WFO 9 RDO 2-Star 29er Mountain Bike

Wide, Full Open: A decade later
Loyal Ninerds feared that it was extinct forever. But the WFO 9 RDO was only dormant, lying in wait, evolving and mutating to reemerge as the apex predator of long-travel 29ers
Genetically engineered for “just right” geometry
All the descending capability of a 170mm travel 29er is fully expressed in this new WFO 9 RDO. Yet any detectable trace of the dreaded “climbing compromises” chromosome is edited out.
We all know that modern enduro bikes have to manage descents into madness on the scale of World Cup DH tracks. Yet they also need to get you efficiently back up to the top when pedaling is your only option. Which, let’s be honest, is usually the case.
With this schizophrenic spectrum of duties in mind, we dialed in a “just right” geometry chart for the WFO 9 RDO. It’s low and slack by nature, but not so slouchy as to kick you out of contention on the steepest climbs.
The native low mode geometry is optimized for all-out, top to bottom, brake-rotor-bluing descents. A 64-degree head tube angle combined with the low BB and long top tube scream “stability” even at eye-watering speeds.
Yet the wheelbase isn’t so rangy as to prevent tight, uphill transitions when the need arises. And a 77-degree seat tube angle keeps your weight centered over the bottom bracket for composed climbing.
If your daily dose of dirt includes more pedaling, tighter corners, and sneaky sniper rocks, you might want a higher bottom bracket and steeper head tube angle. Not to worry – the built-in flip-chip seatstay pivots allow riders to raise the BB by a full 9mm and steepen the geometry by 0.7 degrees.
CVA suspension: the core DNA code
At the heart of our WFO 9 RDO is the Constantly Varying Arc (CVA) suspension system. The first suspension layout made specifically for 29ers, CVA debuted in 2008 and has been the core of Niner’s DNA ever since.
Our CVA fundamentals are rock solid: it’s stable yet supple while climbing and pedaling; going downhill, it’s sensitive and supportive; it’s consistent and controlled in every phase of travel.
On the WFO, a trunnion mount shock adds width (and therefore stiffness) to the frame and linkage. The shock bolts directly to the rocker link with bearings at the interface. This allows for extra-smooth articulation through the entire rocker sweep of 40-degrees during suspension travel. Furthermore, trunnion shocks occupy less space, allowing a compact form factor.
In consideration of the dueling demands riders expect from the WFO 9 RDO, subtle refinements to the kinematics give it superior pedaling behavior despite 170mm of travel on tap. The leverage ratio curve starts at 3.0, hits 2.4 at 67% travel, then hits 2.6 at full travel. It’s also tuned for a slightly falling rate (about 6% in the last 33% of travel). If you’re running an air shock as the bike is spec’d, the overall rate in every phase of travel feels consistent and natural in every phase of travel. Even with a coil you won’t feel as though the bike is bottoming out.
Confidence to drop into the biggest lines, knowing you’ll get consistency and control from top to bottom: that’s CVA suspension.
The brawny big brother in Niner’s family tree
From a distance, the new WFO 9 RDO looks like a fraternal twin to the trail bike in our line, the popular and handsome RIP 9 RDO. However, Niner’s characteristic full-suspension frame cosmetics deceive your eyes. A closer look reveals that the new WFO 9 RDO is clearly the bigger, brawnier sibling that got its square-jawed genes from cousin Vinnie’s side of the family.
With our signature Rib Cage struts across the front triangle, flattening of the top and down tubes, widening the main rocker link pivot, and beefing up the rear triangle, the entire bike is stiff from front to back. The struts reduce bottom bracket deflection while keeping the upper portion of the front triangle supple and compliant. And the wide, flat surfaces on the top and downtube help to absorb frontal impacts and vibrations while resisting deflection and twisting under torsional load. Finally, crossmembers in the rocker link and swingarm keep the rear of the bike on lockdown.
In order to get the best possible shifting performance, we designed the smoothest, straightest cable routing possible. Cable housing slides easily through full-sleeve guide tubes in gentle arcs from front to back. And an integrated “cable cage” above the bottom bracket area keeps the housing free to move as the suspension cycles, yet far from harm.
CVA Suspension
Supple yet stable, and the confidence to drop into gnarly lines, knowing you’ll get consistency and control from top to bottom: that’s CVA suspension.
RDO Carbon Fibre
Niner’s premium Race Day Optimized carbon fiber means more strength, higher stiffness, and less weight.
Full Sleeve Cable Guards
No more fishin’. We built in end-to-end cable guides through the frame for easy installation and maintenance.
Enduro Max Black Oxide Pivot Bearings
Niner uses the smoothest, most durable pivot bearings in the industry. Made by Enduro, they’re built for life.
Protection Where You Need It
Factory installed, integrated frame protection to keep your ride safe from harm, even when you’re in over your head.
Lifetime Warranty
Ride, race, rally. We have you covered with warranty service, small parts, and a support team that actually answers the phone.
Specifications
Available frame sizes
SM, MD, LG
Available colors
Hot Tamale and Fade to Black
FRAME
NINER RDO CARBON FIBER, 170MM TRAVEL, GEO FLIP CHIP, RIB CAGE CONSTRUCTION, FULL SLEEVE CABLE ROUTING, ENDURO MAX BLACK OXIDE PIVOT BEARINGS
FORK
FOX 38 FLOAT PERFORMANCE GRIP EVOL, 3 POSITION, 180MM, 110X15MM, 44MM OFFSET
SHOCK
FOX FLOAT X2 PERFORMANCE EVOL, HSC, LSC, LSR, 2 POSITION
TUBES / SEALANT
STANS NO TUBES SEALANT (2 X 2OZ BOTTLES)
FRONT WHEEL
NINER ALLOY 30MM, 110X15MM FRONT
REAR WHEEL
NINER ALLOY 30MM, 148X12MM REAR
FRONT TIRE
SCHWALBE MAGIC MARY EVO SUPER TRAIL TLE ADDIX SOFT 2.6
REAR TIRE
SCHWALBE HANS DAMPF EVO SUPER TRAIL TLE ADDIX SOFT 2.6
BRAKES
SRAM G2 R
BRAKE LEVERS
SRAM G2 R
BRAKE ROTORS
200/200 CENTERLINE ROTORS
CHAIN
SRAM SX EAGLE 12SP
FRONT SHIFTER
N/A
REAR SHIFTER
SRAM SX EAGLE 12SP
FRONT DERAILLEUR
N/A
REAR DERAILLEUR
SRAM SX EAGLE 12SP
CASSETTE
SRAM PG 1210 11-50T
CRANKSET
SRAM X1 1K EAGLE DUB, 32T (ALL SIZES -170MM)
BOTTOM BRACKET
SRAM DUB BSA THREADED
SADDLE
NINER CUSTOM TR WITH CR-MO RAILS, PRINTED NINER GRAPHIC
SEATPOST
KS LEV SI (XS/S-100MM, M/L/XL-150MM)
HANDLEBAR
RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP
STEM
RACE FACE AEFFECT R 40MM, 35MM CLAMP
HEADSET
NINER INTERNAL ZS SHIS DESCRIPTION ZS44/28.6|ZS56/40
GRIPS
NINER GRRRIPS L/O NYLON FLANGED SOFT COMPOUND
APPROX. WEIGHT