RIP RDO 27.5 2-Star Complete Mountain Bike
For nearly 15 years, Niner has fittingly only offered 29-inch wheel bikes, or until just recently with the Jet and RIP, 29/27.5+ mountain bikes, so we were just as surprised as you when we heard the all-new RIP 9 was going to be offered in separate 29 and 27.5-specific frames. This makes sense though as it allows the brand the ability to completely optimize the frame for each wheel size, eliminating any compromises and, try as they might, even the current crop of 29ers can't hold a candle to the nimble handling and playfulness of running 27.5-inch wheels. With that out of the way, the RIP RDO 27.5 2-Star Complete Mountain Bike gives all-mountain riders the choice of running smaller diameter wheels with Niner's mastery of carbon construction and its much-lauded CVA suspension platform. Like its 29-inch brother, this frame receives the same refinements including its Rib Cage construction for added stiffness, increased standover height and room for longer dropper posts, a high/low flip chip adjustable geometry, and a retune of its famous CVA suspension platform. This 2-Star build packs both value and performance with its FOX suspension front and rear and SRAM's wonderful NX Eagle 12-speed drivetrain offering the same wide gearing range as its top-tier groups.
While the old RIP had a dual wheel size persona, the new RIPs are frames dedicated to each wheel size. This allows Niner to optimize the frame for each wheel size by dialing in the suspension kinematics and geometry specifically for each size eliminating compromises. Either way, you're getting 140mm of CVA rear travel that’s sensitive off the top and supportive in the mid-stroke paired with 150mm of fork travel and clearance for 2.8-inch tires with room for mud. This is the longest, lowest, and slackest Niner ever created, however, with the inclusion of its adjustable geometry via flip chips at the seatstay pivots, a Niner first, you can make adjustments as needed for your terrain and riding style.
The high mode geometry is perfect for tamer trails and daily riding. You'll quickly appreciate the climbing and pedaling efficiency of its steeper 75.8-degree seat tube angle and reworked CVA suspension platform. On the way down, you can shred in confidence with its longer reach, slack 66-degree head tube angle, and a 37mm, reduced offset fork. If you have some shuttling or bike park laps on the docket, its low mode brings out even more aggression by slacking out the head angle by a full degree (65-degree) and lowering the bottom bracket by 7mm. Niner further gives its sendy blessings by shortening the seat tube by 20mm to accommodate longer, 170mm dropper posts as well as increasing the standover height. Furthermore, a lower stack height and shortened head tube accommodate a wider range of fit and varying rise of handlebars. Lastly, the short, 430mm chainstays on this 27.5-inch version ensure the bike can handle tight singletrack trails as well.
Visually, one feature that's immediately apparent is the new frame design with a wide and stiff Rib Cage struts on the main triangle. This, in conjunction with a flattened top and down tube, wider main rocker link pivot, and an oversized rear triangle boosts the frame's responsiveness for precise handling. Things that might not be so noticeable are the durable and long-lasting Enduro MAX Black Oxide bearings at the pivots and Niner's wonderful end-to-end, full sleeve internal cable guides making any maintenance down the road a breeze. Other frame niceties include a sag indicator on the rocker link pivot, factory installed scuff guards and frame protection at vulnerable locations (the plastic "skid plate" on the lower link is awesome), FOX Live-valve ready, water bottle compatibility inside the frame, and a creak-free threaded bottom bracket with ISCG-05 chain guide mounts.
On the trail, you'll notice the struts reduce bottom bracket deflection down below for efficient pedaling while allowing the upper portion of the front triangle to remain compliant and better able to track across rough rock gardens, while the wide, flat surfaces found on the top and downtube help to absorb frontal impacts and vibrations from repeated waterbar bashings while resisting deflection under a torsional load. And since the rear triangle received beefier tubing, it allows Niner to remove the seatstay bridge at the rocker link opening up extra room for wider rim and tire combinations.
As we mentioned above, the RIP receives an updated CVA platform that's designed to increase pedaling efficiency by riding more in the mid-stroke of the travel. We experienced gobs of traction when scaling technical climbs while remaining sensitive and fully active, even under braking, while descending. It basically takes Niner’s proven patented CVA linkage layout and axle path and refines the leverage ratio curve for supple travel early on with more support in the middle, before progressively ramping up at end stroke.
The new, higher leverage ratio off the top makes it easier to set the shock in motion and overcome static friction. At the mid-stroke, the leverage ratio decreases toward the sag point, meaning less rear wheel force is transmitted to the shock allowing it to better support you in the travel. And at the end stroke, the leverage ratio increases just slightly to overcome the natural progressivity of an air spring, giving a bottomless, smooth response under the biggest hits.
- Niner's first 27.5-specific machine to dominate the trails
- 140mm of CVA suspension smooths out big hits and pedals efficiently
- RDO carbon layup drops grams and provides responsiveness
- Reinforced frame details and large tubing improves stiffness
- Accepts 27.5in tires up to 2.8in wide
- Longer, slacker, and lower for improved confidence and stability
- Shimano NX 1x12 drivetrain provides a wide range of gears
- FOX fork and shock eat up technical trail features with ease