Niner RLT e9 RDO 4-Star A perfect blend of performance, versatility, and reliability, the Niner RLT e9 RDO 4-Star is built for gravel riding, adventure, and utility. With a gravel-optimized Shimano GRX drivetrain and powerful Bosch Performance Line CX motor, this e-gravel bike is ready for anything—from dirt roads to city streets.
Key Features
Shimano GRX Brakes & Drivetrain: Featuring flat-mount GRX brakes with custom Niner adapters for compatibility, plus Boost-spaced GRX drivetrain for integration with mountain bike components.
Bosch Performance Line CX Motor: Propels up to 28 mph (25 kph in the EU) with a 500Wh battery, offering smooth, reliable pedal assist over long distances.
Versatile and Durable Design: This carbon frame passes ISO mountain bike standards, thanks to Niner’s rugged RDO construction and a robust carbon backbone bonded to an alloy motor mount.
Flexible Setup Options: Designed for flat bar compatibility, with Boost hub and crankset spacing for MTB part interchangeability, plus compatibility with a FOX AX suspension fork and dropper seatpost routing.
Adventure-Ready Build: Equipped with custom Niner racks, clearance for 50c tires, and fender mounts for ultimate adaptability in any environment.
Specifications
Frame: RLT e9 RDO Carbon
Fork: Niner RDO Carbon
Headset: Niner Integrated IS42/28.6 | IS52/40
Brakes: Shimano GRX 400, RT-EM81 180mm CL rotors
Shifters: Shimano GRX 600
Crank: Praxis Bosch G4 ISIS 42T
Motor: Bosch Gen4 Performance Line CX, 28mph
Battery: Bosch Powertube 500Wh
Display: Bosch Purion
Cassette: Shimano SLX M7000
Rear Derailleur: Shimano GRX 800
Chain: Shimano CN-E8000
Wheelset: Stan’s NoTUBES Arch D
Tires: Schwalbe G-One Speed Performance 700x50c
Handlebar: Easton EA50 AX
Stem: Niner Alloy
Seatpost: Niner Carbon
Saddle: Niner Custom with Cr-Mo rails
Available Sizes
50cm, 53cm, 56cm, 59cm
Color Options
Green
Explore New Terrain
With the Niner RLT e9 RDO 4-Star, you’re not just getting an e-gravel bike; you’re gaining a powerful tool for adventure. Whether tackling gravel paths, social trails, or city commutes, this bike is engineered for riders who want to explore with speed, durability, and unparalleled versatility.
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Ratings & Reviews
Overall rating: 5.0 / 5 from 4 reviews.
AI Generated Review Summary
Summary topics
Review topics: ["bike","service"].
Review highlights
Reviews
Fantastic bike. Rides like a
"Fantastic bike. Rides like a road bike and great power assist."
— Tom P. (5/5)
Amazing bike AND customer service
"This bike is a gem! So easy to ride even with the assist off. Additionally, ordering from Cambria bike was quick and easy and the customer service was excellent."
— Lauren (5/5)
WOW
"Amazing bike! Smooth power deliver and a rock solid ride! Absolutely love this bike!!!"
— David A. (5/5)
Niner bliss
"I love it. I never had an E bike before so it was the first time that ever rode rode one more fun than you can even imagine. The Bosch engine is great. Plan on bike packing next week. CBO is the best."
— Steven W. (5/5)
Q&A
I have a Niner RLT Steel 59cm which fits me perfectly. Would you be able to compare it to the RLT e9 and say the geometry of steel is closer to 56 or 59 on e9?
Our customer service team reached out to the customer and supplied Niner spec sheets for the two bikes he asked comparison on.
Is this bike, Product ID: GM102021-34 equipped with the Bosch Performance Line CX for the European market (20 mph) or the Performance Line Speed as pictured for the International market as described (28 mph)?
Thanks for reaching out! The 2021 Niner RLT e9 RDO 4-star - Electric model - https://cambriabike.com/products/niner-rlt-e9-rdo-4-star-electric-moss-green-2021?variant=41071224225974- comes from Cambria Bike with the Bosch Gen4 Performance Line CX motor that has a pedal assist up to 28 mph.
There are small and large sizes to choose from, but specs talk about 53/56/59 inch sizes. What is large?
The 56cm would be equivalent to the large. They are available in small, medium large and X-large ( 50cm ,53cm, 56cm, 59cm)
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