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Niner MCR 9 RDO 4-Star GRX800 2X Bike: Ride faster, go farther, stay longer. 50mm of CVA suspension gives you confidence, comfort, and control on off-road excursions.
By adding our CVA full suspension to a dedicated gravel bike platform, we’re blending the confidence and control of a cross-country race bike with the efficiency, fit, and responsive handling of a gravel bike. The result is a drop bar bike with superior comfort, power delivery, and pure, unadulterated fun.
The suspension question asked and answered
Why forge the first drop-bar full-suspension bike? Because Niner Bikes was founded in 2005 with a simple goal. Making riding on dirt a better experience, period. We’ve been pioneers in off road technology. First, it was the 29er wheel size. In 2008, it was our Constantly Varying Arc full suspension design. In 2013, it was the first RLT gravel bikes, purpose built for the demands of long days pedaling on rough surfaces.
Fourteen years later, the MCR 9 RDO is a natural extension of our original effort. When you ride one, you’ll see. More comfort, more confidence, more control, and more fun and freedom. By adapting high performance suspension for gravel, we believe the MCR 9 will allow gravel riders to pedal comfortably, powerfully, with more control and confidence over once-unthinkable surfaces. We’re proud to be the pioneers bringing full suspension to gravel bikes.
Gravel-tuned CVA suspension
At the heart of the MCR is Niner’s patented, proven, Constantly Varying Arc (CVA) suspension system. It debuted in 2008 and has been incrementally refined ever since. But the fundamentals have not changed: CVA is stable yet supple while climbing and pedaling; sensitive and supportive going downhill; consistent and controlled in every situation.
For the MCR 9 RDO, we changed the suspension curve to emphasize performance for a seated, pedaling rider. It’s tuned to be especially sensitive to high frequency, low amplitude bumps, and more linear with less end-stroke progression. Configured as a short-travel system, we want riders to easily achieve full travel with less emphasis on big hits and bottom out resistance like you’d find on our mountain bikes.
In the MCR 9 RDO, we made the most sophisticated, tunable suspension system possible, with minimum unsprung weight. By suspending as much of the bike and rider mass as possible, we achieve the most sensitive, compliant ride possible. For the suspension to be effective for riders who are seated and pushing on the pedals, this was a critical piece of the full suspension puzzle to nail down.
Air springs are infinitely tunable to suit a wide range of riders and their gear. And oil damping is essential, both for controlling compression energy inputs from the rider and for dissipating rebound energy as the suspension recovers from bumps of all sizes. Control and comfort, for confidence like no other
The MCR 9 is more than a gravel bike. It doesn’t skitter and skate through corners. It doesn’t buck you out of the saddle when you pedal through washboards, ruts, and cobblestoned stream
crossings. And descending rough roads at speed is not a white-knuckle fear fest.
Why? Because it doesn’t rely simply on tire pressure and undamped frame flex for suspension. Thanks to suspension, the MCR 9 encourages sitting deep in the saddle and pedaling powerfully through chop. It hugs the ground and tracks corners like a slot car. It’s planted and confident on high speed descents. It leaves you fresher, with more energy and less wasted effort, by isolating you from intrusive bump inputs.
If light weight, endless uphills, and ruthless efficiency is your thing, our RLT 9 gravel bike series is your jam. If steep, rough descents and straight up singletrack figures prominently in your plans, consider the RKT 9 RDO mountain bike.
But if you want an entirely new outlook on gravel,one that marries the confidence and comfort of a mountain bike with the efficiency and fit of a gravel bike, hop on this Magic Carpet for the ride of your life.
Nine things you need to know
1. 50mm of stable yet supple CVA suspension with a refined curve for small bump performance and full travel.
2. Rear shock lockout with handlebar remote; fork lockout.
3. RDO carbon fiber main frame and rear triangle with forged, 1-piece linkages.
4. Integrated rear fender protects suspension components.
5. 11 fixed mounting points for frame bags, bottles, and more.
6. Removable front derailleur mount, for 2x and 1x chainring options.
7. Durable, long-lasting Enduro Max “Black Oxide” pivot bearings.
8. Clearance for 700x50c and 650b x 2.0 tires.
9. End-to-end, Full Sleeve internal cable guides including
dropper post routing and integrated frame protection.
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Specs & Information
- Build specifications for: MCR 9 RDO 4-STAR GRX800 2X
- FRAME MCR 9 RDO - OLIVE GREEN/ORANGE OR BLACK/MAGNETIC GREY
- FORK FOX 32 SC FLOAT AX PERFORMANCE ELITE EVOL FIT4, 40MM, 100X15MM, 44MM OFFSET
- SHOCK X-FUSION MICROLITE RL W/ REMOTE L/O
- FRONT WHEEL DT SWISS G 1800 SPLINE, 25MM, CENTERLOCK, 100X15MM FRONT
- REAR WHEEL DT SWISS G 1800 SPLINE, 25MM, CENTERLOCK, 142X12MM REAR
- FRONT TIRE SCHWALBE G-ONE ALLROUND EVO SUPER TERRAIN, TLE, ADDIX SPEEDGRIP, 700 X 45
- REAR TIRE SCHWALBE G-ONE ALLROUND EVO SUPER TERRAIN, TLE, ADDIX SPEEDGRIP, 700 X 45
- TUBES / SEALANT STANS NO TUBES SEALANT (2 X 2oz BOTTLES)
- BRAKES SHIMANO GRX800
- BRAKE LEVERS SHIMANO GRX800
- BRAKE ROTORS SHIMANO RT800 160/160MM CL ROTORS
- R/ SHIFTER SHIMANO GRX800 11SP
- F/ SHIFTER SHIMANO GRX800 2SP
- R / DERAILLEUR SHIMANO GRX800 GS 11SP SHADOW PLUS
- F / DERAILLEUR SHIMANO ULTEGRA R8000
- CASSETTE SHIMANO ULTEGRA HG800 11SP 11-34T
- CHAIN SHIMANO HG 601 11SP
- CRANK SET EASTON EC90 CARBON 47X32T (53/56 - 172.5MM, 59 - 175MM)
- BOTTOM BRACKET EASTON PF30
- SADDLE NINER CUSTOM WITH CRN-TI RAILS, EMBOSSED NINER GRAPHIC
- SEAT POST NINER RDO SEAT POST, 400MM, NINER GRAPHIC
- HANDLEBAR EASTON EA50 AX (53/56- 440MM, 59- 460MM)
- STEM NINER RDO STEM, NINER GRAPHIC (53/56- 80MM, 59- 90MM)
- HEADSET NINER INTEGRATED SHIS DESCRIPTION IS42/28.6|IS52/40
- GRIPS NINER BAR TAPE
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