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2021 Niner

JET 9 RDO 2-STAR SRAM SX EAGLE

A 29″ carbon frame full suspension trail bike with upper mid-range components.
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Manufacturer Price

$4,100
Weight29.6 lbs  
FrameCarbon
SuspensionFull, 120 / 130mm
ForkFox Rhythm Float 34
ShockFox Float X Performance
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetX1, SX Eagle
BrakesSRAM Level Hydraulic Disc
SeatpostDropper
Where to Buy
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

25 mph

JET 9 RDO 2-STAR SRAM SX EAGLE

26 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Niner Jet trail bike series offers a mix of modern geometry and thoughtful design, appealing to a broad range of riders with its quick steering and precision on specific terrains. While it excels in descending and has a planted feel, some models show a tendency to sink into their travel on climbs and have a slack seat angle. The bike's suspension performance is generally supportive, with a smooth stroke, though it may lack efficiency on flatter trails.

Pros
  • Modern geometry and quick steering

  • Thoughtful design with smart cable management

  • Supportive suspension with a smooth stroke

  • Appeals to a broad range of riders

  • Excellent descending capabilities

Cons
  • Slack seat angle affects climbing efficiency

  • Tendency to sink into travel on climbs

  • Lacks precision on flatter trails

  • Higher premium compared to some brands

  • Some models have a relatively narrow optimal range of sag adjustment

Key Quotes
It successfully mitigates the slight timidness shared by most short-travel 29ers.
Beta logoBeta
The latest generation of firmly cements its place among the best short travel trail bikes out there.
Bikerumor logoBikerumor
The Niner is that bike. It feels faster than it is, which might suit the more data-skeptical very well.
Pinkbike

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Pinkbike
Field Test: 2022 Niner Jet 9 RDO - The Easy Rider

Dec 2021 · Henry Quinney

The Niner Jet 9 is more focused on the down portion of 'downcountry' compared to some of the other bikes on test.

Highs
  • Sensibly specced for aggressive riding

  • Thrives on steeper trails

  • Hardtail like feeling suggests effieciency

Lows
  • Not as efficient as you would think

  • Lacks precision on flatter trails

  • Doesn't offer that much grip on the climbs

Read Review

Bikerumor
Review: 2021 Niner JET 9 RDO makes (mostly) all the right moves

Jun 2021 · Tyler Benedict

The latest generation of Niner’s JET 9 RDO firmly cements its place among the best short travel trail bikes out there. It was evident from my first ride that they’d worked their magic again, and reinforced every ride thereafter. It’s more capable. It’s stiffer. And it feels more at home in its skin as a

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Beta
First Ride: Niner JET 9 RDO 4-Star XT

May 2021 · Travis Engel

The new Niner JET 9 RDO takes natural steps forward in some elements of its design, but stands still in others.

Highs
  • All that Niner swagger

  • Smart cable management

  • Thoughtful touches like threaded BB, UDH hanger

Lows
  • Slack actual seat angle leads to inconsistent geo numbers

  • Not supportive under body input or pedaling load

Read Review

Bicycling
The New Jet 9 RDO Is the Latest Version of Niner’s Long-Running Trail Bike

May 2021

The third generation of Niner’s 120mm trail bike is fast and balanced.

Read Review

Vital MTB
2021 Niner JET 9 RDO 4-Star Shimano XT Bike

May 2021 · Jason_Schroeder

As impressive on the climbs, as it is on the downhills, Niner's new JET makes a strong first impression.

Highs
  • CVA suspension design has a planted feel

  • Balanced reach to chainstay length as tested

  • FOX Suspension is supportive and ready for aggressive riding

  • Updated, descent-focused geometry still climbs incredibly well

Lows
  • Deore XT brake pad cooling fins rattle on caliper

  • Rear axle removable handle rattles

  • 30-pound weight lessens snappy, XC bike characteristics

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Mountain Bike Action
Bike Test: Niner Jet 9 RDO

Dec 2018 · McCoy

Merry Christmas! Here's 2018's Top Story

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MTBR
New colors for Niner RIP 9, JET 9 and RLT 9

Mar 2018 · Justin Wages

Niner is offering new internal cable guides and fresh clean colors to make life easy and a little more colorful. - Mtbr.com

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BIKE Magazine
Bible Review: Niner Jet 9 RDO 3-Star

Jan 2018

Niner, a brand built on 29-inch wheels, goes plus size.

Read Review

Geometry
Specs
Build
Frame

NINER RDO CARBON FIBER, CVA SUSPENSION, 120MM TRAVEL, ALUMINUM LINKAGE, ENDURO MAX PIVOT BEARINGS, FULL SLEEVE INTERNAL CABLE ROUTING

BB StandardBSA, 73mm, Threaded

Tire Clearance2.6"

ColorsEmerald Green; Magnetic Grey

Fork

FOX 34 FLOAT RHYTHM GRIP EVOL, SWEEP ADJUST, 130MM, 110X15MM, 44MM OFFSET

Travel130mm

Spring TypeAir

Shock

FOX FLOAT X PERFORMANCE EVOL 2 POSITION W/ ADJUST

Travel120mm

Bottom Bracket

SRAM DUB BSA THREADED

Headset

NINER INTERNAL ZS SHIS DESCRIPTION ZS44/28.6|ZS56/40

Stem

RACE FACE AEFFECT R 40MM, 35MM CLAMP

Handlebar

RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP

Saddle

NINER CUSTOM TR WITH CR-MO RAILS, PRINTED NINER GRAPHIC

Seatpost

KS LEV SI (XS/S-100MM, M/L/XL-150MM)

TypeDropper

Grips

NINER GRRRIPS L/O NYLON FLANGED SOFT COMPOUND

Groupset
Rear Derailleur

SRAM SX EAGLE 12SP

Front Derailleur

N/A

Crank

SRAM X1 1K EAGLE DUB 32T

Shifters

SRAM SX EAGLE 12SP

Cassette

SRAM PG 1210 11-50T

Chain

SRAM SX EAGLE 12SP

Brakes

SRAM LEVEL

TypeSRAM Level Hydraulic Disc

Brake Levers

SRAM LEVEL

Wheels
Rims

Front: NINER ALLOY, 30MM INNER WIDTH, 110X15MM, Rear: NINER ALLOY, 30MM INNER WIDTH, 148X12MM

Tires

Front: SCHWALBE NOBBY NIC EVO SUPER TRAIL TLE ADDIX SPEEDGRIP 2.6, Rear: SCHWALBE NOBBY NIC EVO SUPER TRAIL TLE ADDIX SPEEDGRIP 2.35

Disc Rotors

180/180MM G2CS ROTORS

Rider Notes
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First added January 31

Last updated October 18

Not listed for 1,705 days