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Niner JET 9 RDO Frame

Item #: FR239I00
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Niner JET 9 RDO Carbon Frame

Though 29ers originally debuted on the cross country course, Niner has taken the big wheeled bike and made it into a versatile, high performance trail machine. Capitalizing on the rolling efficiency of the 29” wheel, Niner designed the JET 9 RDO frame to be more than just a capable climber. Through their patented CVA suspension technology and their trail proven geometry, Niner was able to create a 29” frame that is not only efficient, but is also nimble enough to handle the endless rock sections, drops, and even the occasional wooden ramp, while maintaining exceptional small bump compliance. The award winning design entails sleek carbon upper rocker links and a custom forged alloy lower linkage. Due to the location of the lower pivot bolt, chain torque effectively isolates and cancels out the forces acting to create inefficiency in pedal stroke. Combine this with the 142x12mm rear hub spacing, and the power transfer becomes so responsive you’ll forget you’re riding a full suspension bike.

The JET 9 RDO frame features Niner’s Race Day Optimized carbon fiber production process known as Carbon Compaction System. Niner’s Carbon Compaction System uses a pre-shaped Styrofoam mold encased by a bladder that the carbon is then laid around. The firm Styrofoam core provides the desired shape of the frame and a solid platform for the carbon lay. The bladder is then inflated to fully compress the carbon against the outer metal mold for accurate compaction and a smooth inside wall, producing a fruitful list of benefits. First, it sets the carbon in the exact position it should be in without any shifting from a bladder inflating after layup. Secondly, it reduces the amount of excess resin to pool inside the frame, meaning lighter weight and less wasting. Lastly, it enables the inside wall to be free of wrinkles and loose fibers, resulting in fewer potential weak spots.

Niner JET 9 RDO Frame Features

  • RDO carbon layup for no-compromise stiffness, strength and ride quality
  • 100mm of patented CVA suspension is efficient in every chainring
  • Tuned for CVA – Fox float CTD shock with Kashima coating
  • Carbon suspension linkage and unique Niner hardware
  • Compatible with 100 - 120mm tapered forks
  • 142x12mm Maxle rear spacing


  • 73mm PF30 BB width
  • PF30 BB adaptable to threaded via adapters
  • Shock size: 7.5" x 2.0" (190mm x 50mm) - 4" (100mm) travel
  • Shock mounting hardware: 21.84mm x M6
  • Shock SAG: 25% (which will move the o-ring 12.5mm down the shaft)
  • 31.6mm seat post size, 400mm length recommended
  • 34.9mm seat collar size
  • S3 (low) Direct Mount front derailleur, bottom pull
  • 1.125" - 1.5" tapered headtube with integrated (Campy style) headset (headset included). Cane Creek standard description: IS42/28.6|EC52/40
  • Enduro Max Black Ozide sealed bearings - (8x) 22 x 10 x 6mm
  • 12 x 142mm rear spacing
  • Small, Medium, Large and Extra-Large have one bottle mount inside the front triangle and one under the downtube
  • Titanium frame guards
  • Can fit up to a 2.4" tire (tire size varies by brand, some tires may not fit)
  • Compatible with standard 3x chainring systems
  • SRAM recommended 2x chainrings: 26/39T or lower
  • SRAM XX1 recommended max chainring: 38T. Q-Factor: 168mm
  • SHIMANO XT recommended 2x chainrings: 28/40T or lower
  • SHIMANO XTR recommended 2x chainrings: 26/38T. Niner does not recommmend the use of 40T (48.8mm chain line) cranks because the large chaining may contact the frame.

Niner JET 9 RDO Geometry (100mm Fork)
Size Extra Small Small Medium Large Extra Large
Effective Top Tube Length 559mm 578mm 595mm 615mm 635mm
Seat Tube Length 381mm 406mm 457mm 509mm 559mm
Head Tube Length 100mm 110mm 120mm 130mm 145mm
Head Angle 71° 71° 71.5° 71.5° 71.5°
Seat Angle 74.5° 74.5° 74.5° 74.5° 74.5°
BB Drop 35mm 35mm 35mm 35mm 35mm
Front Center 633mm 652mm 663mm 689mm 708mm
Wheel Base 1086mm 1105mm 1116mm 1141mm 1161mm
Chain Stay Length 455mm 455mm 455mm 455mm 455mm
Reach 393mm 409mm 422mm 444mm 459mm
Stack 590mm 600mm 612mm 621mm 635mm
Standover Height 672mm 690mm 715mm 738mm 766mm
Recommended Height 5'3" - 5'5" 5'3" - 5'9" 5'8" - 6' 5'11" - 6'3" 6'3" - 6'7"

Niner JET 9 RDO Frame Geometry (120mm Fork)
Size Extra Small Small Medium Large Extra Large
Effective Top Tube Length 562mm 580mm 598mm 618mm 638mm
Seat Tube Length 381mm 406mm 457mm 509mm 559mm
Head Tube Length 100mm 110mm 120mm 130mm 145mm
Head Angle 70° 70° 70.5° 70.5° 70.5°
Seat Angle 73.5° 73.5° 73.5° 73.5° 73.5°
BB Drop 27mm 27mm 27mm 27mm 27mm
Front Center 639mm 658mm 668mm 694mm 714mm
Wheel Base 1092mm 1112mm 1122mm 1148mm 1168mm
Chain Stay Length 455mm 455mm 455mm 455mm 455mm
Reach 383mm 399mm 413mm 434mm 449mm
Stack 597mm 607mm 618mm 628mm 643mm
Standover Height 679mm 696mm 721mm 745mm 773mm
Recommended Height 5'3" - 5'5" 5'3" - 5'9" 5'8" - 6' 5'11" - 6'3" 6'3" - 6'7"


by PowerReviews
Niner JET 9 RDO Frame

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

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(2 of 2 customers found this review helpful)


Better than imagined

By Commander

from Chattanooga, TN

About Me Avid Cyclist

Verified Buyer


  • Attractive Design
  • Durable
  • Easy To Install
  • Lightweight


    Best Uses

    • Mountain Biking
    • Racing
    • Upgrade

    Comments about Niner JET 9 RDO Frame:

    I am an aggressive XC rider and find the Jet 9 to have plenty of travel with no noticeable loss in efficiency. My local trail times have improved immediately getting on this bike (Coming from a 26" Titus Racer X). I oped to use a 120mm Fox after trying out a 100mm Fox too. There was no noticeable difference in steering feel but the additional 1" of travel is nice.

    • Was this a gift?:
    • No

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