2021 Niner Bikes Jet 9 RDO 4 Star XT Large

When mountain bikers tell us they want one bike that does everything well, we steer them toward the JET 9 RDO. It’s our most popular mountain bike and it consistently earns accolades from media reviewers, everyday riders, and Niner athletes. By blending the best attributes of a dedicated cross-country bike with the suspension and geometry characteristics of a trail bike, we’ve made the most versatile bike we could imagine.

The JET 9 RDO is made to accept your choice of 29-er and 27.5-Plus wheels and tires. The frame geometry is made to manage both technical downhills and challenging climbs. And the suspension system is designed for a blend of efficiency and performance.
Niner’s [R]Evolution geometry translates to modern trail manners when you need them most. The roomy cockpit has a comfortable reach for short stem lengths, giving you quick handling and plenty of maneuverability to blast through chunder and slash corners. And of course, the slack, 67-degree front end and long wheelbase contribute stability and self-confidence when you’re dropping into the steepest lines.

On the other hand, a steep 74-degree seat angle gets you centered over the BB for climbing. It’s paired nicely with the short 434mm chainstay length for better pedaling efficiency when you’re crawling up the steepest sections of trail.