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RLT 9 4-Star GRX 1x Gravel Bike

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Why We Like The Niner RLT 9 4-Star GRX 1x Gravel Bike

From our favorite paved trail to cutting across a gravel road, the Niner RLT 9 4-Star GRX 1x Gravel Bike allows us to explore the outdoors on a budget-friendly, versatile gravel machine. Its aluminum frame and welded hydroformed aluminum tubing are praised for their versatility and affordability, as well as their stiffness and long-lasting durability. To help absorb shocks on the rough roads we come across, Niner uses their RDO carbon fiber for the fork. During our longest rides, comfort won't be an issue thanks to the long chainstays, low bottom bracket height, and slacker headtube angles.

Since this is a gravel grinder, it only makes sense that Niner incorporated the gravel-specific GRX800 1x drivetrain to push us past our limits. It features a 42T chainring and an 11-42T cassette, providing us with more gearing than we could ever think we need for a long gravel adventure. The shifting is smooth and precise, while the Shimano GRX800 disc brakes ensure crisp stops at the moment we need them.


  • Lightweight gravel machine for off-road adventures of any distance
  • Niner's hydroformed 6061 aluminum frame is durable and stiff
  • RDO carbon fiber fork absorbs shocks, features internal cable routing
  • Comfortable geometry from a slack headtube angle and low bottom bracket
  • Shimano GRX800 1x drivetrain uses a 42T chainring for versatile gearing
  • Easily change wheels for different terrains with versatile tire clearance
  • Storage isn't an issue with 26 threaded mounts for bags, bottles, and more
  • Item #NNR99E7
Frame Material
Niner hydroformed 6061 aluminum
Niner RDO full carbon
Niner Integrated SHIS Description IS42/28.6|IS52/40
SHIMANO GRX800, 11-speed
Front Derailleur
Rear Derailleur
SHIMANO GRX800 GS, shadow plus, 11-speed
Easton EC90 carbon
Chainring Sizes
Crank Arm Length
[47cm, 50cm] 170mm, [53cm, 56cm] 172.5mm, [59cm, 62cm] 175mm
Bottom Bracket
Easton PF30
SHIMANO XT M8000, 11-speed
Cassette Range
Shimano HG 601, 11-speed
Shimano GRX800
Brake Type
hydraulic disc
Shimano CL800 160/160MM CL
Easton EA50 AX
Handlebar Width
[47cm, 50cm] 420mm, [53cm, 56cm] 440mm, [59cm, 62cm] 460mm
Bar Tape
Niner bar tape
Niner RDO
Stem Length
[47cm , 50cm] 80mm, [53cm, 56cm] 90mm, [59cm, 62cm] 100mm
Niner custom with TI rails, embossed Niner graphic
Niner RDO carbon, 400mm
DT Swiss G 1800 Spline 25, Centerlock
DT Swiss 370
Front Axle
12 x 100mm
Rear Axle
12 x 142mm
Tire Clearance
700 x 50 or 650b x 2.0
Schwalbe G-ONE Allround EVO Super Terrain, TLE Addix Speedgrip
Tire Size
700 x 45
not included
Claimed Weight
Manufacturer Warranty
5 years