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Niner Air 9 Carbon 3 Star XT Bike

Item #: BI232P03
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Niner Air 9 Carbon XT Bike

The Niner Air 9 Carbon is Niner’s lastest iteration of the well known Air 9 frame. Niner has proven year after year that they have 29er hardtail geometory down, which they are demonstrating yet again with the new Air 9 Carbon. Although it’s technically not an RDO, it borrows the mold and several other features previously only seen on the RDO.

The Air 9 Carbon features internally routed shifter cables, thinner tube profiles, smaller junctions, carbon molded headset races, a newly positioned rear disc brake post mounts, and a PF30 carbon bottom bracket shell. Niner decided to go with a PF30 bottom bracket shell for the Air 9 Carbon geared-only carbon hardtail. The PF30 bottom bracket shell allows for 24mm or 30mm spindle cranks to be installed, however this frame is not compatible with an EBB (hence ‘geared-only’). Also, repositioning the rear brake mount inside the chainstay has helped make the whole rear end much stiffer. Niner is now using tapered headtubes on all their new frames creating a stiffer front end which drastically improves the handling. On the new Air 9 Carbon, Niner also decided to go with a very sleek integrated headset that is lightweight and easy to install and maintain.

The new Air 9 Carbon is an awesome bike that anyone could enjoy. Although it’s technically not ‘Race Day Optimized’, this bike is as much at home at XC races as it is at riding your weekend loop. Providing their proven hardtail geometry on a lightweight carbon frame Niner definitely knew what they were doing when they designed the new Air 9 Carbon.

Niner Air 9 Carbon XT Bike Features

  • 73mm PF30 BB width
  • PF30 BB adaptable to threaded via adapters
  • Not compatible with aftermarket EBB systems
  • 31.6mm seat post size, 400mm length recommended
  • 34.9mm front derailleur, high mount, bottom pull
  • 34.9mm seat collar size
  • 1.125”-1.5” tapered head tube with integrated (Campy style) headset (headset included) Cane Creek standard description: IS42/28.6|IS52/40
  • Small frame has one bottle mount inside the front triangle. Medium, large and XL have two bottle mounts inside the front triangle
  • Replaceable derailleur hanger
  • Titanium chain drop and chain suck protection pieces
  • Protective 3M tape under DT
  • Integrated aluminum head badge for internal, full-housing cable routing
  • 135mm QR rear spacing
  • Can fit up to a 2.35” 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: 32T. Q-Factor: 168mm
  • SHIMANO XT recommended 2x chainrings: 28/40T or lower
  • SHIMANO XTR 2x is not recommended. Both versions (40t/48.8mm chain line and 38t/46.6mm chain line) position the large chainring in a way that it may contact the frame.

Niner Air 9 Carbon XT Bike Components

Frame Niner Air 9 Carbon, Hi Ho Silver
Fork RockShox SID XX Solo Air 100mm, Remote Lockout, 15mm
Wheelset NoTubes 3.30/ZTR Arch EX, 15mm Front, 10 x 135mm QR Rear
Tires Schwalbe Rapid Rob EVO TL 2.40/Racing Ralph EVO TL 2.25
Brakes & Rotors Shimano XT M785 Ice Tech pads with 180/160mm rotors
Brake Levers Shimano XT M785
Shifter (Rear) Shimano XT M780 10spd I-Spec
Shifter (Front) Shimano XT M780 2/3spd I-Spec
Rear Derailleur Shimano XT M786 GS Med. Cage 10spd Shadow Plus
Front Derailleur Shimano XT M786 10spd
Cassette Shimano XT M771, 11-36T 10spd
Chain Shimano HG95 10spd
Crankset Shimano XT M785 38/26T
Bottom Bracket Shimano XT BB70
Saddle WTB Volt Race with Cr-Mo rails, Niner graphics
Seatpost Niner Carbon Seat Post, 400mm, red Niner graphics
Handlebar Niner Flat Top Carbon, 710mm, red Niner graphics
Stem Niner Alloy Stem, red Niner graphics
Grips Niner grips

Components subject to change without notice.

Niner Air 9 Carbon Bike Geometry

Size (100mm fork) Small Medium Large Extra Large
Effective Top Tube Length 590mm 606mm 626mm 645mm
Seat Tube Length 394mm 419mm 483mm 533mm
Head Tube Length 106mm 110mm 126mm 145mm
Head Angle 71° 71° 71° 71°
Seat Angle 73° 73° 73° 73°
BB Drop 54mm 54mm 54mm 54mm
Front Center 644mm 660mm 680mm 700mm
Wheel Base 1077mm 1094mm 1113mm 1133mm
Chain Stay Length 439mm 439mm 439mm 439mm
Horiz. Chainstay 437mm 437mm 437mm 437mm
Reach 404mm 418mm 433mm 446mm
Stack 608mm 617mm 631mm 651mm
Standover Height 706mm 726mm 781mm 823mm

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.