The Niner RKT 9 RDO is a dedicated cross-country race bike that balances pedaling efficiency with modern trail capability. Redesigned for the 2023 model year, this generation moves away from traditional, steep-angled XC geometry in favor of a longer and slacker footprint. Niner increased the rear suspension to 100mm of travel, utilizing a trunnion-mounted shock driven by their dual-link CVA system. The frame is optimized for a 100mm fork but is explicitly approved for 120mm setups, allowing riders to push the bike into light trail territory.
Beyond suspension updates, the current RKT 9 RDO modernizes its frame standards. It adopts a threaded bottom bracket, full-sleeve internal cable routing, and a SRAM UDH rear derailleur hanger. With clearance for high-volume tires and a dramatically lowered standover height, it is built for racers and aggressive riders who need a chassis that handles technical courses without sacrificing forward momentum.
| Stack | 602mm |
| Reach | 426mm |
| Top tube | 599mm |
| Headtube length | 100mm |
| Standover height | 681mm |
| Seat tube length | 406mm |
The RKT 9 RDO utilizes a geometry flip-chip at the lower shock mount, allowing riders to toggle between high and low settings. With a 100mm fork in the high position, the head tube sits at 67.6 degrees. Dropping the chip or installing a 120mm fork slackens the front end significantly, pushing the head angle down to 66.6 degrees for increased descending stability.
Fit is heavily influenced by the frame's exceptionally low top tube. This design maximizes standover clearance but requires a substantial amount of exposed seatpost. Because the effective seat tube angle hovers around 74.6 degrees, running a high saddle pushes the rider's weight further back over the rear axle. Riders with long legs or those between sizes may need to size up or use a zero-offset post to maintain an optimal pedaling position.
The cockpit is built around a short stem and wide 780mm handlebars, a setup that quickens steering response to offset the slacker head angle. This combination keeps the rider centered and aggressive, providing leverage for out-of-the-saddle sprints and tight cornering.
Frameset
Frame
Niner RDO carbon fiber frame, 100mm CVA suspension, aluminum rocker links, Enduro Max pivot bearings
Fork
FOX 34 SC FLOAT Factory EVOL FIT4, 2-position remote lockout, Kashima coat, 120mm, 110x15mm, 44mm offset
Rear shock
FOX Float DPS Factory EVOL, 2-position remote lockout, Kashima coat
Groupset
Shift levers
SRAM GX Eagle 12-speed (rear shifter)
Rear derailleur
SRAM GX Eagle 12-speed
Cassette
SRAM Eagle XG-1275, 12-speed, 10-52T
Chain
SRAM GX Eagle 12-speed
Crankset
SRAM Descendant 7K Eagle DUB, 32T (XS/S: 170mm; M/L/XL: 175mm)
Bottom bracket
SRAM DUB PF30
Front brake
SRAM G2 R
Rear brake
SRAM G2 R
Front rotor
180mm SRAM CenterLine (Centerlock)
Rear rotor
160mm SRAM CenterLine (Centerlock)
Wheelset
Front wheel
DT Swiss X 1900 Spline wheel, aluminum clincher, 25mm internal, 110x15mm, Centerlock
Rear wheel
DT Swiss X 1900 Spline wheel, aluminum clincher, 25mm internal, 148x12mm, Centerlock, Ratchet System 36 LN
Front tire
Schwalbe Racing Ray EVO Super Terrain, TLE, Addix Speedgrip, 2.35
Rear tire
Schwalbe Racing Ralph EVO Super Terrain, TLE, Addix Speed, 2.35
Cockpit
Stem
Niner RDO stem (XS/S/M: 80mm; L/XL: 90mm), Niner graphic
Handlebars
Niner Flat Top RDO, 780mm, Niner graphic
Saddle
Niner custom saddle with Cr-Mo rails, embossed Niner graphic
Seatpost
Niner carbon seatpost, 370mm, Niner graphic
Grips
Niner GRRRips L/O, nylon soft compound
Niner offers the RKT 9 RDO in a focused range of builds, with the provided options spanning from an entry-level 2-Star package to a mid-tier 3-Star specification. Both builds utilize the same carbon fiber frame, Enduro Max pivot bearings, and 12-speed SRAM Eagle drivetrains, but they diverge significantly in suspension and component quality.
The 3-Star SRAM GX Eagle build represents the performance sweet spot. It upgrades to Fox Factory suspension with Kashima coating, including a Step-Cast 34 fork and a remote lockout for the rear shock. This tier also features DT Swiss X 1900 Spline alloy wheels and SRAM G2 R brakes, making it ready for competitive racing out of the box.
The more accessible 2-Star SRAM SX Eagle build shifts to heavier, non-remote Fox Performance and Rhythm suspension components. It relies on Niner's house-brand alloy wheels and standard SRAM Level brakes. Notably, the 2-Star build is the only option in this pairing to omit the remote shock lockout, which some riders actually prefer as it frees up handlebar space for a dropper post remote. Both builds roll on a fast-rolling Schwalbe Racing Ray and Racing Ralph tire combination.
2-Star SRAM SX Eagle
$4,399
3-Star SRAM GX Eagle
$5,699
Reviewers consistently characterize the RKT 9 RDO as a highly efficient pedaler that handles technical terrain better than its travel numbers suggest. The defining trait of this generation is its "incredibly low center of gravity" (Bike Rumor), which testers credit for the bike's exceptional cornering grip and planted feel. Under power, the CVA suspension provides a firm pedaling platform that resists bobbing. One tester noted that the bike feels "crisp, efficient, and responsive" (Bicycling) when accelerating, behaving almost like a hardtail on smooth climbs while remaining active enough to maintain traction over rough patches.
While the suspension is praised for its efficiency, reviewers point out that the mid-stroke is tuned firmly for racing rather than plush comfort. This setup allows riders to "chew through rows of roots and small rock gardens under power" (Bike Rumor) without losing momentum, though it requires an active riding style. The lowered bottom bracket does result in occasional pedal strikes in rocky sections, a tradeoff most testers accepted for the handling benefits.
The frame's lateral stiffness is frequently highlighted as a major asset in tight singletrack. Testers found that the bike "pops in and out of the corners" (YouTube) with immediate directional changes. Overall, the consensus points to a machine that excels on modern, demanding cross-country courses, rewarding riders who prioritize speed and precise handling.
