RIP 9 RDO

The Niner RIP 9 RDO is an aggressive mid-travel trail bike built for riders who want downhill composure without sacrificing pedaling efficiency. Redesigned from the ground up, this generation steps down slightly in rear travel to 140mm, paired with a 150mm fork, shifting its focus from pure enduro to versatile trail riding. Niner offers the frame in dedicated 29-inch and 27.5-inch platforms rather than compromising with a single adaptable chassis.

The defining visual and structural update is the Rib Cage strut design surrounding the shock, which significantly increases torsional stiffness at the bottom bracket while allowing the upper frame to absorb trail chatter. With its refined Constantly Varying Arc (CVA) suspension and modern trail standards like a threaded bottom bracket and fully sleeved internal routing, the RIP 9 RDO is positioned as a highly capable daily driver for technical, demanding terrain.

Build

Size

Stack	619mm
Reach	465mm
Top tube	622mm
Headtube length	100mm
Standover height	744mm
Seat tube length	446mm

Fit and geometry

The RIP 9 RDO features a modern, adjustable geometry that balances high-speed stability with everyday trail agility. A flip chip in the seatstay pivot allows riders to toggle between a High and Low setting, altering the head tube angle by a full degree and dropping the bottom bracket by seven millimeters. In the High setting, the 66-degree head angle and 75.8-degree seat tube angle create a centered, upright pedaling posture that keeps the front wheel tracking cleanly on steep climbs.

Dropping into the Low setting slackens the front end to 65 degrees, pushing the bike’s handling toward aggressive downhill stability. Across all sizes, the reach is roomy but restrained—measuring 440mm on a medium and 465mm on a large—which prevents the bike from feeling overly stretched out in tight corners. Niner also shortened the seat tubes and increased insertion depth, allowing most riders to run long-travel dropper posts. Combined with a reduced-offset fork, the geometry yields a low-slung, maneuverable feel that responds well to active rider input.

Builds

The RIP 9 RDO lineup is built entirely around Niner’s premium carbon frame, with complete builds structured to prioritize suspension quality across the board. The range starts with the 2-Star SRAM SX Eagle build, which delivers strong value by pairing a Fox 36 Rhythm fork and Float X Performance shock with a reliable, entry-level 12-speed drivetrain and Niner’s alloy wheelset. This setup provides the core CVA suspension experience but uses basic SRAM Level brakes, which heavier or more aggressive riders may find underpowered for the bike's descending capabilities.

Stepping up to the 3-Star SRAM GX Eagle build introduces significant performance upgrades. This tier moves to top-tier Fox Factory suspension, featuring a GRIP2-equipped Fox 36 fork and a Float X Factory rear shock with Kashima coating. The drivetrain upgrades to the crisper SRAM GX Eagle, while braking power increases slightly with SRAM G2 R four-piston calipers. The 3-Star build also upgrades the rolling stock to Stan's Crest S2 wheels. Both builds feature a Race Face cockpit, KS LEV dropper posts, and aggressive Schwalbe 2.6-inch tires, ensuring the bike is ready for demanding trails right off the showroom floor.

2-Star SRAM SX Eagle

$4,999

3-Star SRAM GX Eagle

$6,500

Reviews

Reviewers consistently praise the RIP 9 RDO for its balanced suspension and structural stiffness, noting that it descends with the composure of a much larger bike. The updated CVA linkage provides excellent mid-stroke support, allowing riders to push hard into corners and compressions. On rough descents, the suspension "feels like it has more than 140mm of rear suspension" (Outdoorgearlab), absorbing heavy impacts while maintaining a predictable, grounded feel.

The frame’s Rib Cage struts deliver noticeable power transfer benefits, though multiple testers pointed out that the design makes attaching a shock pump difficult, requiring an included adapter. Despite this setup quirk, the resulting chassis stiffness translates directly to trail performance. The bike is highly efficient on climbs, with a pedaling platform that "minimizes feedback while pedaling" (Freehub) even when the shock is left fully open.

Handling feedback highlights a slight tradeoff depending on the trail. While the bike is "very stable with predictable handling" (Bike Rumor) at high speeds, some riders found the slack front end and long wheelbase could feel slightly sluggish in tight, uphill switchbacks. However, by avoiding the extreme length of some contemporary enduro bikes, Niner preserved enough agility to keep the RIP 9 RDO responsive and engaging on rolling, technical singletrack.