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NinerRLT 9
RLT e9 RDO 4-Star GRX e-Bike


Item # NNR99AE

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  • Electric Moss, 50cm ($5,995.00)
  • Electric Moss, 53cm ($5,995.00)
  • Electric Moss, 56cm ($5,995.00)
  • Electric Moss, 59cm ($5,995.00)
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Item # NNR99AE

Why We Like The RLT e9 RDO 4-Star GRX e-Bike

At the end of a 60-mile day on long stretches of gravel with the wind in our face, the last thing we're looking forward to is 15 miles of punchy hills. But, that's what's between us and the car, so it's a good thing we've got the power of Niner's first e-gravel bike behind us. The RLT e9 RDO 4-Star GRX e-Bike is at home on everything from smooth tarmac to choppy gravel, and it's uber-fast with speeds up to 28 miles per hour thanks to the Bosch Performance Line Speed drive system. It gives us a push up those hills and speed over the flats, and that's just what we're looking for on long rides.

  • Niner claims their first e-gravel bike that's fit for all our adventures
  • Bosch Performance offers speeds up to 28mph and a 500wh battery
  • Shimano GRX drivetrain and brakes offer constant reliability
  • RDO carbon fiber frame and fork are tested to mountain bike standards
  • MTB flat bar component interchangeability for added versatility
  • Interchangeable wheel sizes are designed to fit both 700c and 650b

Tech Specs
Frame MaterialNiner RDO Carbon
ForkNiner RDO Carbon
HeadsetNiner Integrated SHIS Description IS42/286
ShiftersShimano GRX
Rear DerailleurShimano GRX 800
ComputerBosch Purion
Drive SystemBosch Gen4 Performance Line CX
Motor Power350W
Battery TypeBosch Powertube 500Wh
Battery Energy500Wh
Max Speed28pmh
CranksetPraxis Bosch G4 ISIS
Chainring Sizes42t
Crank Arm Length170mm, 172.5mm, 175mm
CassetteShimano SLX M7000
Cassette Range11-42t
ChainShimano CN-E8000
BrakesetShimano GRX 400
Brake Typecenterlock disc
RotorsShimano RT-EM810 (180mm)
HandlebarEaston EA50 AX
Handlebar Drop120mm
Handlebar Width420mm, 440mm, 460mm
Bar TapeNiner bar tape
StemNiner alloy stem
Stem Length[50cm, 53cm, 56cm, 59cm] 90mm
SaddleNiner custom with CR-MO rails
SeatpostNiner carbon
WheelsetStans NoTubes Arch D Formula
Hubs[front] Formula CL-811, [rear] Formula ECT-148S
Front Axle15 x 110mm
Rear Axle12 x 142mm
Tire Clearance50mm
TiresSchwalbe G-One Speed Performance
Tire Size700 x 50c
Pedalsnot included
Manufacturer Warranty5 years

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What do you think about this product?


>Rating: 5

Go Farther. Go Faster. Grin a lot.

I've used it several times
True to size
Size Bought
5` 9"
145 lbs

After putting well over 50,000 miles on road and mountain bikes through the years, I felt I deserved an electric boost at my advanced age. I purchased the Niner RLT e9 RDO through Backcountry.com and am extremely happy with it. Living near Moab, I was heavily into mountain biking from the early days (mid-80’s). But virtually all of my riding over the past decade has been on road bikes. Nowadays, I take off from my secluded log cabin and ride up into the LaSal mountains on seldom-travelled paved roads. I was a bit hesitant to buy a bike online, but since there were no Niner dealers near me, I decided to take a chance. I wanted a Class 3 ebike that provided lots of torque and topped out at the 28-mph threshold. I have not been disappointed. The bike was securely packaged. It was simple to assemble. About all I needed to do was install the handlebars, seat post, wheels, and mount the computer. The bars were beautifully taped and all the mechanical components were adjusted perfectly and torqued to the proper specs. If you are accustomed to riding road bikes, you’ll be right at home with the drop handlebars. I’ve found the riding position to be comfortable on some fairly long excursions. When venturing onto gravel roads with this bike, the smooth tires don’t provide very good traction so you need to be on top of your game. Control might be easier in those conditions if you switched to flat handlebars and knobby tires, both of which are fairly easy to do with this bike. The 4 e-boost modes are perfect and it’s easy to switch between them, though you do need to take one hand off the handlebars to do so. The buttons are big and easy to operate even with winter gloves. Turbo mode puts a grin on my face every time I engage it. You can work just as hard as you want on this bike. You can maintain the same cadence and effort as with a non-ebike. But you end up going much, much faster and farther with the same amount of effort. I’ve had no issues with battery range. One thing I discovered on my first ride is that, because of this bike’s weight, you pick up speed quickly on downhill runs. I’m used to riding 20-lb (or lighter) bikes. Thanks to a plethora of titanium, even my ’89 Klein mountain bike weighs just 20 lbs. The ride I do several times a week has an elevation change of nearly 3000 vertical feet. Thankfully, this bike’s brakes do a fantastic job of controlling speed on the long downhill runs and I’ve had no issues with them overheating. Since I ride year-round, I added Niner’s rear rack to carry a bag with winter clothing. The rack is rather short so it was hard to find a bag that would fit it. I was able to get a bag that works and is big enough to carry everything I’ll need to stay warm on the winter downhills. And the paint job? Wowie!! I’ve named her Sparkles.


It says Mfg. warranty 5 years is that everything or just the frame? If the 5 yr warranty doesn't include the Bosch motor, battery & control unit what is the Mfg. warranty on those items? Thanks


I realize it's a very subjective question, but what's expected run time/mileage can be expected from this motor/battery combo? Thanks!

Hi Kirk, A very loaded question as you know, however according to what is listed on the Niner website "500wh integrated, externally removable downtube battery offers easy access and robust range of 50km (avg). (roughly 31 miles)