A legend reborn

More than a decade after Niner's first W.F.O. 9 defined the category and set a benchmark for what a long-travel 29er could do, they've brought it back. The 2021 WFO 9 RDO draws on our years of 29er evolution to establish a new paradigm of unbridled, big-wheel domination. Reborn with 170mm of stable CVA suspension, a 180mm-travel fork, adjustable geometry, increased frame stiffness, and our signature RDO carbon fiber, the new generation of WFO 9 RDO is an enduro-ready brawler with the pedaling prowess to get you to the top in style.

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

That first W.F.O. cut fresh 29er tracks in too many ways to count. Technologies that we take for granted today were pioneered in that legendary frame.

What a difference a decade can make. The strongest remaining genetic link between our original and this new WFO 9 RDO is simply an unquenchable appetite for wide, full open, edge of control, “honey, I can’t feel my face” SPEED.

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.

Giant Yukon 1 Mountain Bike

Kennedy Mark

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